Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

111 files changed, 21019 insertions, 0 deletions

diff --git a/ipc/chromium/src/base/at_exit.cc b/ipc/chromium/src/base/at_exit.cc
new file mode 100644
index 0000000000..057d8b2678
--- /dev/null
+++ b/ipc/chromium/src/base/at_exit.cc
@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/at_exit.h"
+#include "base/logging.h"
+
+namespace base {
+
+// Keep a stack of registered AtExitManagers.  We always operate on the most
+// recent, and we should never have more than one outside of testing, when we
+// use the shadow version of the constructor.  We don't protect this for
+// thread-safe access, since it will only be modified in testing.
+static AtExitManager* g_top_manager = NULL;
+
+AtExitManager::AtExitManager() : lock_("AtExitManager"), next_manager_(NULL) {
+  DCHECK(!g_top_manager);
+  g_top_manager = this;
+}
+
+AtExitManager::AtExitManager(bool shadow)
+    : lock_("AtExitManager"), next_manager_(g_top_manager) {
+  DCHECK(shadow || !g_top_manager);
+  g_top_manager = this;
+}
+
+AtExitManager::~AtExitManager() {
+  if (!g_top_manager) {
+    NOTREACHED() << "Tried to ~AtExitManager without an AtExitManager";
+    return;
+  }
+  DCHECK(g_top_manager == this);
+
+  ProcessCallbacksNow();
+  g_top_manager = next_manager_;
+}
+
+// static
+void AtExitManager::RegisterCallback(AtExitCallbackType func, void* param) {
+  if (!g_top_manager) {
+    NOTREACHED() << "Tried to RegisterCallback without an AtExitManager";
+    return;
+  }
+
+  DCHECK(func);
+
+  mozilla::MutexAutoLock lock(g_top_manager->lock_);
+  g_top_manager->stack_.push(CallbackAndParam(func, param));
+}
+
+// static
+void AtExitManager::ProcessCallbacksNow() {
+  if (!g_top_manager) {
+    NOTREACHED() << "Tried to ProcessCallbacksNow without an AtExitManager";
+    return;
+  }
+
+  mozilla::MutexAutoLock lock(g_top_manager->lock_);
+
+  while (!g_top_manager->stack_.empty()) {
+    CallbackAndParam callback_and_param = g_top_manager->stack_.top();
+    g_top_manager->stack_.pop();
+
+    callback_and_param.func_(callback_and_param.param_);
+  }
+}
+
+// static
+bool AtExitManager::AlreadyRegistered() { return !!g_top_manager; }
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/at_exit.h b/ipc/chromium/src/base/at_exit.h
new file mode 100644
index 0000000000..268d9e0fbe
--- /dev/null
+++ b/ipc/chromium/src/base/at_exit.h
@@ -0,0 +1,76 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_AT_EXIT_H_
+#define BASE_AT_EXIT_H_
+
+#include <stack>
+
+#include "base/basictypes.h"
+
+#include "mozilla/Mutex.h"
+
+namespace base {
+
+// This class provides a facility similar to the CRT atexit(), except that
+// we control when the callbacks are executed. Under Windows for a DLL they
+// happen at a really bad time and under the loader lock. This facility is
+// mostly used by base::Singleton.
+//
+// The usage is simple. Early in the main() or WinMain() scope create an
+// AtExitManager object on the stack:
+// int main(...) {
+//    base::AtExitManager exit_manager;
+//
+// }
+// When the exit_manager object goes out of scope, all the registered
+// callbacks and singleton destructors will be called.
+
+class AtExitManager {
+ protected:
+  // This constructor will allow this instance of AtExitManager to be created
+  // even if one already exists.  This should only be used for testing!
+  // AtExitManagers are kept on a global stack, and it will be removed during
+  // destruction.  This allows you to shadow another AtExitManager.
+  explicit AtExitManager(bool shadow);
+
+ public:
+  typedef void (*AtExitCallbackType)(void*);
+
+  AtExitManager();
+
+  // The dtor calls all the registered callbacks. Do not try to register more
+  // callbacks after this point.
+  ~AtExitManager();
+
+  // Registers the specified function to be called at exit. The prototype of
+  // the callback function is void func().
+  static void RegisterCallback(AtExitCallbackType func, void* param);
+
+  // Calls the functions registered with RegisterCallback in LIFO order. It
+  // is possible to register new callbacks after calling this function.
+  static void ProcessCallbacksNow();
+
+  static bool AlreadyRegistered();
+
+ private:
+  struct CallbackAndParam {
+    CallbackAndParam(AtExitCallbackType func, void* param)
+        : func_(func), param_(param) {}
+    AtExitCallbackType func_;
+    void* param_;
+  };
+
+  mozilla::Mutex lock_;
+  std::stack<CallbackAndParam> stack_ MOZ_GUARDED_BY(lock_);
+  AtExitManager* next_manager_;  // Stack of managers to allow shadowing.
+
+  DISALLOW_COPY_AND_ASSIGN(AtExitManager);
+};
+
+}  // namespace base
+
+#endif  // BASE_AT_EXIT_H_
diff --git a/ipc/chromium/src/base/basictypes.h b/ipc/chromium/src/base/basictypes.h
new file mode 100644
index 0000000000..8cd84bee59
--- /dev/null
+++ b/ipc/chromium/src/base/basictypes.h
@@ -0,0 +1,262 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_BASICTYPES_H_
+#define BASE_BASICTYPES_H_
+
+#include <limits.h>  // So we can set the bounds of our types
+#include <stddef.h>  // For size_t
+#include <string.h>  // for memcpy
+
+#include "base/port.h"  // Types that only need exist on certain systems
+
+#include "mozilla/Assertions.h"
+#include "mozilla/IntegerPrintfMacros.h"
+
+// A type to represent a Unicode code-point value. As of Unicode 4.0,
+// such values require up to 21 bits.
+// (For type-checking on pointers, make this explicitly signed,
+// and it should always be the signed version of whatever int32_t is.)
+typedef signed int char32;
+
+const uint8_t kuint8max = ((uint8_t)0xFF);
+const uint16_t kuint16max = ((uint16_t)0xFFFF);
+const uint32_t kuint32max = ((uint32_t)0xFFFFFFFF);
+const uint64_t kuint64max = ((uint64_t)GG_LONGLONG(0xFFFFFFFFFFFFFFFF));
+const int8_t kint8min = ((int8_t)0x80);
+const int8_t kint8max = ((int8_t)0x7F);
+const int16_t kint16min = ((int16_t)0x8000);
+const int16_t kint16max = ((int16_t)0x7FFF);
+const int32_t kint32min = ((int32_t)0x80000000);
+const int32_t kint32max = ((int32_t)0x7FFFFFFF);
+const int64_t kint64min = ((int64_t)GG_LONGLONG(0x8000000000000000));
+const int64_t kint64max = ((int64_t)GG_LONGLONG(0x7FFFFFFFFFFFFFFF));
+
+// Platform- and hardware-dependent printf specifiers
+#if defined(OS_POSIX)
+#  define PRId64L "I64d"
+#  define PRIu64L "I64u"
+#  define PRIx64L "I64x"
+#elif defined(OS_WIN)
+#  define PRId64L L"I64d"
+#  define PRIu64L L"I64u"
+#  define PRIx64L L"I64x"
+#endif
+
+// A macro to disallow the copy constructor and operator= functions
+// This should be used in the private: declarations for a class
+#undef DISALLOW_COPY_AND_ASSIGN
+#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
+  TypeName(const TypeName&);               \
+  void operator=(const TypeName&)
+
+// An older, deprecated, politically incorrect name for the above.
+#undef DISALLOW_EVIL_CONSTRUCTORS
+#define DISALLOW_EVIL_CONSTRUCTORS(TypeName) DISALLOW_COPY_AND_ASSIGN(TypeName)
+
+// A macro to disallow all the implicit constructors, namely the
+// default constructor, copy constructor and operator= functions.
+//
+// This should be used in the private: declarations for a class
+// that wants to prevent anyone from instantiating it. This is
+// especially useful for classes containing only static methods.
+#undef DISALLOW_IMPLICIT_CONSTRUCTORS
+#define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
+  TypeName();                                    \
+  DISALLOW_COPY_AND_ASSIGN(TypeName)
+
+// The arraysize(arr) macro returns the # of elements in an array arr.
+// The expression is a compile-time constant, and therefore can be
+// used in defining new arrays, for example.  If you use arraysize on
+// a pointer by mistake, you will get a compile-time error.
+//
+// One caveat is that arraysize() doesn't accept any array of an
+// anonymous type or a type defined inside a function.  In these rare
+// cases, you have to use the unsafe ARRAYSIZE_UNSAFE() macro below.  This is
+// due to a limitation in C++'s template system.  The limitation might
+// eventually be removed, but it hasn't happened yet.
+
+// This template function declaration is used in defining arraysize.
+// Note that the function doesn't need an implementation, as we only
+// use its type.
+template <typename T, size_t N>
+char (&ArraySizeHelper(T (&array)[N]))[N];
+
+// That gcc wants both of these prototypes seems mysterious. VC, for
+// its part, can't decide which to use (another mystery). Matching of
+// template overloads: the final frontier.
+#ifndef _MSC_VER
+template <typename T, size_t N>
+char (&ArraySizeHelper(const T (&array)[N]))[N];
+#endif
+
+#define arraysize(array) (sizeof(ArraySizeHelper(array)))
+
+// ARRAYSIZE_UNSAFE performs essentially the same calculation as arraysize,
+// but can be used on anonymous types or types defined inside
+// functions.  It's less safe than arraysize as it accepts some
+// (although not all) pointers.  Therefore, you should use arraysize
+// whenever possible.
+//
+// The expression ARRAYSIZE_UNSAFE(a) is a compile-time constant of type
+// size_t.
+//
+// ARRAYSIZE_UNSAFE catches a few type errors.  If you see a compiler error
+//
+//   "warning: division by zero in ..."
+//
+// when using ARRAYSIZE_UNSAFE, you are (wrongfully) giving it a pointer.
+// You should only use ARRAYSIZE_UNSAFE on statically allocated arrays.
+//
+// The following comments are on the implementation details, and can
+// be ignored by the users.
+//
+// ARRAYSIZE_UNSAFE(arr) works by inspecting sizeof(arr) (the # of bytes in
+// the array) and sizeof(*(arr)) (the # of bytes in one array
+// element).  If the former is divisible by the latter, perhaps arr is
+// indeed an array, in which case the division result is the # of
+// elements in the array.  Otherwise, arr cannot possibly be an array,
+// and we generate a compiler error to prevent the code from
+// compiling.
+//
+// Since the size of bool is implementation-defined, we need to cast
+// !(sizeof(a) & sizeof(*(a))) to size_t in order to ensure the final
+// result has type size_t.
+//
+// This macro is not perfect as it wrongfully accepts certain
+// pointers, namely where the pointer size is divisible by the pointee
+// size.  Since all our code has to go through a 32-bit compiler,
+// where a pointer is 4 bytes, this means all pointers to a type whose
+// size is 3 or greater than 4 will be (righteously) rejected.
+
+#define ARRAYSIZE_UNSAFE(a)     \
+  ((sizeof(a) / sizeof(*(a))) / \
+   static_cast<size_t>(!(sizeof(a) % sizeof(*(a)))))
+
+// Use implicit_cast as a safe version of static_cast or const_cast
+// for upcasting in the type hierarchy (i.e. casting a pointer to Foo
+// to a pointer to SuperclassOfFoo or casting a pointer to Foo to
+// a const pointer to Foo).
+// When you use implicit_cast, the compiler checks that the cast is safe.
+// Such explicit implicit_casts are necessary in surprisingly many
+// situations where C++ demands an exact type match instead of an
+// argument type convertable to a target type.
+//
+// The From type can be inferred, so the preferred syntax for using
+// implicit_cast is the same as for static_cast etc.:
+//
+//   implicit_cast<ToType>(expr)
+//
+// implicit_cast would have been part of the C++ standard library,
+// but the proposal was submitted too late.  It will probably make
+// its way into the language in the future.
+template <typename To, typename From>
+inline To implicit_cast(From const& f) {
+  return f;
+}
+
+// The COMPILE_ASSERT macro (below) creates an otherwise-unused typedef.  This
+// triggers compiler warnings with gcc 4.8 and higher, so mark the typedef
+// as permissibly-unused to disable the warnings.
+#if defined(__GNUC__)
+#  define COMPILE_ASSERT_UNUSED_ATTRIBUTE __attribute__((unused))
+#else
+#  define COMPILE_ASSERT_UNUSED_ATTRIBUTE /* nothing */
+#endif
+
+// The COMPILE_ASSERT macro can be used to verify that a compile time
+// expression is true. For example, you could use it to verify the
+// size of a static array:
+//
+//   COMPILE_ASSERT(ARRAYSIZE_UNSAFE(content_type_names) == CONTENT_NUM_TYPES,
+//                  content_type_names_incorrect_size);
+//
+// or to make sure a struct is smaller than a certain size:
+//
+//   COMPILE_ASSERT(sizeof(foo) < 128, foo_too_large);
+//
+// The second argument to the macro is the name of the variable. If
+// the expression is false, most compilers will issue a warning/error
+// containing the name of the variable.
+
+// Avoid multiple definitions for webrtc
+#if !defined(COMPILE_ASSERT)
+template <bool>
+struct CompileAssert {};
+
+#  define COMPILE_ASSERT(expr, msg)     \
+    typedef CompileAssert<(bool(expr))> \
+        msg[bool(expr) ? 1 : -1] COMPILE_ASSERT_UNUSED_ATTRIBUTE
+#endif
+
+// Implementation details of COMPILE_ASSERT:
+//
+// - COMPILE_ASSERT works by defining an array type that has -1
+//   elements (and thus is invalid) when the expression is false.
+//
+// - The simpler definition
+//
+//     #define COMPILE_ASSERT(expr, msg) typedef char msg[(expr) ? 1 : -1]
+//
+//   does not work, as gcc supports variable-length arrays whose sizes
+//   are determined at run-time (this is gcc's extension and not part
+//   of the C++ standard).  As a result, gcc fails to reject the
+//   following code with the simple definition:
+//
+//     int foo;
+//     COMPILE_ASSERT(foo, msg); // not supposed to compile as foo is
+//                               // not a compile-time constant.
+//
+// - By using the type CompileAssert<(bool(expr))>, we ensures that
+//   expr is a compile-time constant.  (Template arguments must be
+//   determined at compile-time.)
+//
+// - The outter parentheses in CompileAssert<(bool(expr))> are necessary
+//   to work around a bug in gcc 3.4.4 and 4.0.1.  If we had written
+//
+//     CompileAssert<bool(expr)>
+//
+//   instead, these compilers will refuse to compile
+//
+//     COMPILE_ASSERT(5 > 0, some_message);
+//
+//   (They seem to think the ">" in "5 > 0" marks the end of the
+//   template argument list.)
+//
+// - The array size is (bool(expr) ? 1 : -1), instead of simply
+//
+//     ((expr) ? 1 : -1).
+//
+//   This is to avoid running into a bug in MS VC 7.1, which
+//   causes ((0.0) ? 1 : -1) to incorrectly evaluate to 1.
+
+// MetatagId refers to metatag-id that we assign to
+// each metatag <name, value> pair..
+typedef uint32_t MetatagId;
+
+// Argument type used in interfaces that can optionally take ownership
+// of a passed in argument.  If TAKE_OWNERSHIP is passed, the called
+// object takes ownership of the argument.  Otherwise it does not.
+enum Ownership { DO_NOT_TAKE_OWNERSHIP, TAKE_OWNERSHIP };
+
+// The following enum should be used only as a constructor argument to indicate
+// that the variable has static storage class, and that the constructor should
+// do nothing to its state.  It indicates to the reader that it is legal to
+// declare a static instance of the class, provided the constructor is given
+// the base::LINKER_INITIALIZED argument.  Normally, it is unsafe to declare a
+// static variable that has a constructor or a destructor because invocation
+// order is undefined.  However, IF the type can be initialized by filling with
+// zeroes (which the loader does for static variables), AND the destructor also
+// does nothing to the storage, AND there are no virtual methods, then a
+// constructor declared as
+//       explicit MyClass(base::LinkerInitialized x) {}
+// and invoked as
+//       static MyClass my_variable_name(base::LINKER_INITIALIZED);
+namespace base {
+enum LinkerInitialized { LINKER_INITIALIZED };
+}  // namespace base
+
+#endif  // BASE_BASICTYPES_H_
diff --git a/ipc/chromium/src/base/chrome_application_mac.h b/ipc/chromium/src/base/chrome_application_mac.h
new file mode 100644
index 0000000000..bf968dad5e
--- /dev/null
+++ b/ipc/chromium/src/base/chrome_application_mac.h
@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_CHROME_APPLICATION_MAC_H_
+#define BASE_CHROME_APPLICATION_MAC_H_
+
+#import <AppKit/AppKit.h>
+
+#include "base/basictypes.h"
+#include "base/scoped_nsobject.h"
+
+// Event hooks must implement this protocol.
+@protocol CrApplicationEventHookProtocol
+- (void)hookForEvent:(NSEvent*)theEvent;
+@end
+
+@interface CrApplication : NSApplication {
+ @private
+  BOOL handlingSendEvent_;
+  // Array of objects implementing the CrApplicationEventHookProtocol
+  scoped_nsobject<NSMutableArray> eventHooks_;
+}
+@property(readonly, getter=isHandlingSendEvent, nonatomic) BOOL handlingSendEvent;
+
+// Add or remove an event hook to be called for every sendEvent:
+// that the application receives.  These handlers are called before
+// the normal [NSApplication sendEvent:] call is made.
+
+// This is not a good alternative to a nested event loop.  It should
+// be used only when normal event logic and notification breaks down
+// (e.g. when clicking outside a canBecomeKey:NO window to "switch
+// context" out of it).
+- (void)addEventHook:(id<CrApplicationEventHookProtocol>)hook;
+- (void)removeEventHook:(id<CrApplicationEventHookProtocol>)hook;
+
++ (NSApplication*)sharedApplication;
+@end
+
+namespace chrome_application_mac {
+
+// Controls the state of |handlingSendEvent_| in the event loop so that it is
+// reset properly.
+class ScopedSendingEvent {
+ public:
+  ScopedSendingEvent();
+  ~ScopedSendingEvent();
+
+ private:
+  CrApplication* app_;
+  BOOL handling_;
+  DISALLOW_COPY_AND_ASSIGN(ScopedSendingEvent);
+};
+
+}  // namespace chrome_application_mac
+
+#endif  // BASE_CHROME_APPLICATION_MAC_H_
diff --git a/ipc/chromium/src/base/chrome_application_mac.mm b/ipc/chromium/src/base/chrome_application_mac.mm
new file mode 100644
index 0000000000..4df6df5593
--- /dev/null
+++ b/ipc/chromium/src/base/chrome_application_mac.mm
@@ -0,0 +1,64 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "chrome_application_mac.h"
+
+#include "base/logging.h"
+
+@interface CrApplication ()
+@property(readwrite, getter=isHandlingSendEvent, nonatomic) BOOL handlingSendEvent;
+@end
+
+@implementation CrApplication
+@synthesize handlingSendEvent = handlingSendEvent_;
+
+// Initialize NSApplication using the custom subclass.  Check whether NSApp
+// was already initialized using another class, because that would break
+// some things.
++ (NSApplication*)sharedApplication {
+  NSApplication* app = [super sharedApplication];
+  if (![NSApp isKindOfClass:self]) {
+    CHROMIUM_LOG(ERROR) << "NSApp should be of type " << [[self className] UTF8String] << ", not "
+                        << [[NSApp className] UTF8String];
+    DCHECK(false) << "NSApp is of wrong type";
+  }
+  return app;
+}
+
+- (id)init {
+  if ((self = [super init])) {
+    eventHooks_.reset([[NSMutableArray alloc] init]);
+  }
+  return self;
+}
+
+- (void)sendEvent:(NSEvent*)event {
+  chrome_application_mac::ScopedSendingEvent sendingEventScoper;
+  for (id<CrApplicationEventHookProtocol> handler in eventHooks_.get()) {
+    [handler hookForEvent:event];
+  }
+  [super sendEvent:event];
+}
+
+- (void)addEventHook:(id<CrApplicationEventHookProtocol>)handler {
+  [eventHooks_ addObject:handler];
+}
+
+- (void)removeEventHook:(id<CrApplicationEventHookProtocol>)handler {
+  [eventHooks_ removeObject:handler];
+}
+
+@end
+
+namespace chrome_application_mac {
+
+ScopedSendingEvent::ScopedSendingEvent()
+    : app_(static_cast<CrApplication*>([CrApplication sharedApplication])),
+      handling_([app_ isHandlingSendEvent]) {
+  [app_ setHandlingSendEvent:YES];
+}
+
+ScopedSendingEvent::~ScopedSendingEvent() { [app_ setHandlingSendEvent:handling_]; }
+
+}  // namespace chrome_application_mac
diff --git a/ipc/chromium/src/base/command_line.cc b/ipc/chromium/src/base/command_line.cc
new file mode 100644
index 0000000000..3118dcbe7b
--- /dev/null
+++ b/ipc/chromium/src/base/command_line.cc
@@ -0,0 +1,389 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/command_line.h"
+
+#if defined(OS_WIN)
+#  include <windows.h>
+#  include <shellapi.h>
+#  include "mozilla/DynamicallyLinkedFunctionPtr.h"
+#endif
+
+#include <algorithm>
+
+#include "base/logging.h"
+#include "base/string_piece.h"
+#include "base/string_util.h"
+#include "base/sys_string_conversions.h"
+
+CommandLine* CommandLine::current_process_commandline_ = NULL;
+
+// Since we use a lazy match, make sure that longer versions (like L"--")
+// are listed before shorter versions (like L"-") of similar prefixes.
+#if defined(OS_WIN)
+const wchar_t* const kSwitchPrefixes[] = {L"--", L"-", L"/"};
+const wchar_t kSwitchTerminator[] = L"--";
+const wchar_t kSwitchValueSeparator[] = L"=";
+#elif defined(OS_POSIX)
+// Unixes don't use slash as a switch.
+const char* const kSwitchPrefixes[] = {"--", "-"};
+const char kSwitchTerminator[] = "--";
+const char kSwitchValueSeparator[] = "=";
+#endif
+
+#if defined(OS_WIN)
+// Lowercase a string.  This is used to lowercase switch names.
+// Is this what we really want?  It seems crazy to me.  I've left it in
+// for backwards compatibility on Windows.
+static void Lowercase(std::wstring* parameter) {
+  transform(parameter->begin(), parameter->end(), parameter->begin(), tolower);
+}
+#endif
+
+#if defined(OS_WIN)
+void CommandLine::ParseFromString(const std::wstring& command_line) {
+  TrimWhitespace(command_line, TRIM_ALL, &command_line_string_);
+
+  if (command_line_string_.empty()) return;
+
+  int num_args = 0;
+  wchar_t** args = NULL;
+  // When calling CommandLineToArgvW, use the API set if available.
+  // Doing so will bypass loading shell32.dll on Win8+.
+  mozilla::DynamicallyLinkedFunctionPtr<decltype(&::CommandLineToArgvW)>
+      pCommandLineToArgvW(L"api-ms-win-downlevel-shell32-l1-1-0.dll",
+                          "CommandLineToArgvW");
+  if (pCommandLineToArgvW) {
+    args = pCommandLineToArgvW(command_line_string_.c_str(), &num_args);
+  } else {
+    args = CommandLineToArgvW(command_line_string_.c_str(), &num_args);
+  }
+
+  // Populate program_ with the trimmed version of the first arg.
+  TrimWhitespace(args[0], TRIM_ALL, &program_);
+
+  bool parse_switches = true;
+  for (int i = 1; i < num_args; ++i) {
+    std::wstring arg;
+    TrimWhitespace(args[i], TRIM_ALL, &arg);
+
+    if (!parse_switches) {
+      loose_values_.push_back(arg);
+      continue;
+    }
+
+    if (arg == kSwitchTerminator) {
+      parse_switches = false;
+      continue;
+    }
+
+    std::string switch_string;
+    std::wstring switch_value;
+    if (IsSwitch(arg, &switch_string, &switch_value)) {
+      switches_[switch_string] = switch_value;
+    } else {
+      loose_values_.push_back(arg);
+    }
+  }
+
+  if (args) LocalFree(args);
+}
+CommandLine::CommandLine(const std::wstring& program) {
+  if (!program.empty()) {
+    program_ = program;
+    command_line_string_ = L'"' + program + L'"';
+  }
+}
+#elif defined(OS_POSIX)
+CommandLine::CommandLine(int argc, const char* const* argv) {
+  for (int i = 0; i < argc; ++i) argv_.push_back(argv[i]);
+  InitFromArgv();
+}
+CommandLine::CommandLine(const std::vector<std::string>& argv) {
+  argv_ = argv;
+  InitFromArgv();
+}
+
+void CommandLine::InitFromArgv() {
+  bool parse_switches = true;
+  for (size_t i = 1; i < argv_.size(); ++i) {
+    const std::string& arg = argv_[i];
+
+    if (!parse_switches) {
+      loose_values_.push_back(arg);
+      continue;
+    }
+
+    if (arg == kSwitchTerminator) {
+      parse_switches = false;
+      continue;
+    }
+
+    std::string switch_string;
+    std::string switch_value;
+    if (IsSwitch(arg, &switch_string, &switch_value)) {
+      switches_[switch_string] = switch_value;
+    } else {
+      loose_values_.push_back(arg);
+    }
+  }
+}
+
+CommandLine::CommandLine(const std::wstring& program) {
+  argv_.push_back(WideToASCII(program));
+}
+#endif
+
+// static
+bool CommandLine::IsSwitch(const StringType& parameter_string,
+                           std::string* switch_string,
+                           StringType* switch_value) {
+  switch_string->clear();
+  switch_value->clear();
+
+  for (size_t i = 0; i < arraysize(kSwitchPrefixes); ++i) {
+    StringType prefix(kSwitchPrefixes[i]);
+    if (parameter_string.find(prefix) != 0) continue;
+
+    const size_t switch_start = prefix.length();
+    const size_t equals_position =
+        parameter_string.find(kSwitchValueSeparator, switch_start);
+    StringType switch_native;
+    if (equals_position == StringType::npos) {
+      switch_native = parameter_string.substr(switch_start);
+    } else {
+      switch_native =
+          parameter_string.substr(switch_start, equals_position - switch_start);
+      *switch_value = parameter_string.substr(equals_position + 1);
+    }
+#if defined(OS_WIN)
+    Lowercase(&switch_native);
+    *switch_string = WideToASCII(switch_native);
+#else
+    *switch_string = switch_native;
+#endif
+
+    return true;
+  }
+
+  return false;
+}
+
+// static
+void CommandLine::Init(int argc, const char* const* argv) {
+  DCHECK(current_process_commandline_ == NULL);
+#if defined(OS_WIN)
+  current_process_commandline_ = new CommandLine;
+  current_process_commandline_->ParseFromString(::GetCommandLineW());
+#elif defined(OS_POSIX)
+  current_process_commandline_ = new CommandLine(argc, argv);
+#endif
+}
+
+void CommandLine::Terminate() {
+  DCHECK(current_process_commandline_ != NULL);
+  delete current_process_commandline_;
+  current_process_commandline_ = NULL;
+}
+
+bool CommandLine::HasSwitch(const std::wstring& switch_string) const {
+  std::wstring lowercased_switch(switch_string);
+#if defined(OS_WIN)
+  Lowercase(&lowercased_switch);
+#endif
+  return switches_.find(WideToASCII(lowercased_switch)) != switches_.end();
+}
+
+std::wstring CommandLine::GetSwitchValue(
+    const std::wstring& switch_string) const {
+  std::wstring lowercased_switch(switch_string);
+#if defined(OS_WIN)
+  Lowercase(&lowercased_switch);
+#endif
+
+  std::map<std::string, StringType>::const_iterator result =
+      switches_.find(WideToASCII(lowercased_switch));
+
+  if (result == switches_.end()) {
+    return L"";
+  } else {
+#if defined(OS_WIN)
+    return result->second;
+#else
+    return ASCIIToWide(result->second);
+#endif
+  }
+}
+
+#if defined(OS_WIN)
+std::vector<std::wstring> CommandLine::GetLooseValues() const {
+  return loose_values_;
+}
+std::wstring CommandLine::program() const { return program_; }
+#else
+std::vector<std::wstring> CommandLine::GetLooseValues() const {
+  std::vector<std::wstring> values;
+  for (size_t i = 0; i < loose_values_.size(); ++i)
+    values.push_back(ASCIIToWide(loose_values_[i]));
+  return values;
+}
+std::wstring CommandLine::program() const {
+  DCHECK(argv_.size() > 0);
+  return ASCIIToWide(argv_[0]);
+}
+#endif
+
+// static
+std::wstring CommandLine::PrefixedSwitchString(
+    const std::wstring& switch_string) {
+  return StringPrintf(L"%ls%ls", kSwitchPrefixes[0], switch_string.c_str());
+}
+
+// static
+std::wstring CommandLine::PrefixedSwitchStringWithValue(
+    const std::wstring& switch_string, const std::wstring& value_string) {
+  if (value_string.empty()) {
+    return PrefixedSwitchString(switch_string);
+  }
+
+  return StringPrintf(L"%ls%ls%ls%ls", kSwitchPrefixes[0],
+                      switch_string.c_str(), kSwitchValueSeparator,
+                      value_string.c_str());
+}
+
+#if defined(OS_WIN)
+void CommandLine::AppendSwitch(const std::wstring& switch_string) {
+  std::wstring prefixed_switch_string = PrefixedSwitchString(switch_string);
+  command_line_string_.append(L" ");
+  command_line_string_.append(prefixed_switch_string);
+  switches_[WideToASCII(switch_string)] = L"";
+}
+
+// Quote a string if necessary, such that CommandLineToArgvW() will
+// always process it as a single argument.
+static std::wstring WindowsStyleQuote(const std::wstring& arg) {
+  // We follow the quoting rules of CommandLineToArgvW.
+  // http://msdn.microsoft.com/en-us/library/17w5ykft.aspx
+  if (arg.find_first_of(L" \\\"\t") == std::wstring::npos) {
+    // No quoting necessary.
+    return arg;
+  }
+
+  std::wstring out;
+  out.push_back(L'"');
+  for (size_t i = 0; i < arg.size(); ++i) {
+    if (arg[i] == '\\') {
+      // Find the extent of this run of backslashes.
+      size_t start = i, end = start + 1;
+      for (; end < arg.size() && arg[end] == '\\'; ++end) /* empty */
+        ;
+      size_t backslash_count = end - start;
+
+      // Backslashes are escapes only if the run is followed by a double quote.
+      // Since we also will end the string with a double quote, we escape for
+      // either a double quote or the end of the string.
+      if (end == arg.size() || arg[end] == '"') {
+        // To quote, we need to output 2x as many backslashes.
+        backslash_count *= 2;
+      }
+      for (size_t j = 0; j < backslash_count; ++j) out.push_back('\\');
+
+      // Advance i to one before the end to balance i++ in loop.
+      i = end - 1;
+    } else if (arg[i] == '"') {
+      out.push_back('\\');
+      out.push_back('"');
+    } else {
+      out.push_back(arg[i]);
+    }
+  }
+  out.push_back('"');
+
+  return out;
+}
+
+void CommandLine::AppendSwitchWithValue(const std::wstring& switch_string,
+                                        const std::wstring& value_string) {
+  std::wstring quoted_value_string = WindowsStyleQuote(value_string);
+  std::wstring combined_switch_string =
+      PrefixedSwitchStringWithValue(switch_string, quoted_value_string);
+
+  command_line_string_.append(L" ");
+  command_line_string_.append(combined_switch_string);
+
+  switches_[WideToASCII(switch_string)] = value_string;
+}
+
+void CommandLine::AppendLooseValue(const std::wstring& value) {
+  command_line_string_.append(L" ");
+  command_line_string_.append(WindowsStyleQuote(value));
+}
+
+void CommandLine::AppendArguments(const CommandLine& other,
+                                  bool include_program) {
+  // Verify include_program is used correctly.
+  // Logic could be shorter but this is clearer.
+  DCHECK(include_program ? !other.program().empty() : other.program().empty());
+  command_line_string_ += L" " + other.command_line_string_;
+  std::map<std::string, StringType>::const_iterator i;
+  for (i = other.switches_.begin(); i != other.switches_.end(); ++i)
+    switches_[i->first] = i->second;
+}
+
+void CommandLine::PrependWrapper(const std::wstring& wrapper) {
+  // The wrapper may have embedded arguments (like "gdb --args"). In this case,
+  // we don't pretend to do anything fancy, we just split on spaces.
+  std::vector<std::wstring> wrapper_and_args;
+  SplitString(wrapper, ' ', &wrapper_and_args);
+  program_ = wrapper_and_args[0];
+  command_line_string_ = wrapper + L" " + command_line_string_;
+}
+
+#elif defined(OS_POSIX)
+void CommandLine::AppendSwitch(const std::wstring& switch_string) {
+  std::string ascii_switch = WideToASCII(switch_string);
+  argv_.push_back(kSwitchPrefixes[0] + ascii_switch);
+  switches_[ascii_switch] = "";
+}
+
+void CommandLine::AppendSwitchWithValue(const std::wstring& switch_string,
+                                        const std::wstring& value_string) {
+  std::string ascii_switch = WideToASCII(switch_string);
+  std::string ascii_value = WideToASCII(value_string);
+
+  argv_.push_back(kSwitchPrefixes[0] + ascii_switch + kSwitchValueSeparator +
+                  ascii_value);
+  switches_[ascii_switch] = ascii_value;
+}
+
+void CommandLine::AppendLooseValue(const std::wstring& value) {
+  argv_.push_back(WideToASCII(value));
+}
+
+void CommandLine::AppendArguments(const CommandLine& other,
+                                  bool include_program) {
+  // Verify include_program is used correctly.
+  // Logic could be shorter but this is clearer.
+  DCHECK(include_program ? !other.program().empty() : other.program().empty());
+
+  size_t first_arg = include_program ? 0 : 1;
+  for (size_t i = first_arg; i < other.argv_.size(); ++i)
+    argv_.push_back(other.argv_[i]);
+  std::map<std::string, StringType>::const_iterator i;
+  for (i = other.switches_.begin(); i != other.switches_.end(); ++i)
+    switches_[i->first] = i->second;
+}
+
+void CommandLine::PrependWrapper(const std::wstring& wrapper_wide) {
+  // The wrapper may have embedded arguments (like "gdb --args"). In this case,
+  // we don't pretend to do anything fancy, we just split on spaces.
+  const std::string wrapper = WideToASCII(wrapper_wide);
+  std::vector<std::string> wrapper_and_args;
+  SplitString(wrapper, ' ', &wrapper_and_args);
+  argv_.insert(argv_.begin(), wrapper_and_args.begin(), wrapper_and_args.end());
+}
+
+#endif
diff --git a/ipc/chromium/src/base/command_line.h b/ipc/chromium/src/base/command_line.h
new file mode 100644
index 0000000000..d89824d849
--- /dev/null
+++ b/ipc/chromium/src/base/command_line.h
@@ -0,0 +1,190 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This class works with command lines: building and parsing.
+// Switches can optionally have a value attached using an equals sign,
+// as in "-switch=value".  Arguments that aren't prefixed with a
+// switch prefix are considered "loose parameters".  Switch names are
+// case-insensitive.  An argument of "--" will terminate switch
+// parsing, causing everything after to be considered as loose
+// parameters.
+
+// There is a singleton read-only CommandLine that represents the command
+// line that the current process was started with.  It must be initialized
+// in main() (or whatever the platform's equivalent function is).
+
+#ifndef BASE_COMMAND_LINE_H_
+#define BASE_COMMAND_LINE_H_
+
+#include "build/build_config.h"
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+
+class InProcessBrowserTest;
+
+class CommandLine {
+ public:
+#if defined(OS_WIN)
+  // Creates a parsed version of the given command-line string.
+  // The program name is assumed to be the first item in the string.
+  void ParseFromString(const std::wstring& command_line);
+#elif defined(OS_POSIX)
+  // Initialize from an argv vector (or directly from main()'s argv).
+  CommandLine(int argc, const char* const* argv);
+  explicit CommandLine(const std::vector<std::string>& argv);
+#endif
+
+  // Construct a new, empty command line.
+  // |program| is the name of the program to run (aka argv[0]).
+  // TODO(port): should be a FilePath.
+  explicit CommandLine(const std::wstring& program);
+
+  // Initialize the current process CommandLine singleton.  On Windows,
+  // ignores its arguments (we instead parse GetCommandLineW()
+  // directly) because we don't trust the CRT's parsing of the command
+  // line, but it still must be called to set up the command line.
+  static void Init(int argc, const char* const* argv);
+
+  // Destroys the current process CommandLine singleton. This is necessary if
+  // you want to reset the base library to its initial state (for example in an
+  // outer library that needs to be able to terminate, and be re-initialized).
+  // If Init is called only once, e.g. in main(), calling Terminate() is not
+  // necessary.
+  static void Terminate();
+
+  // Get the singleton CommandLine representing the current process's
+  // command line.
+  static const CommandLine* ForCurrentProcess() {
+    DCHECK(current_process_commandline_);
+    return current_process_commandline_;
+  }
+
+  static bool IsInitialized() { return !!current_process_commandline_; }
+
+  // Returns true if this command line contains the given switch.
+  // (Switch names are case-insensitive.)
+  bool HasSwitch(const std::wstring& switch_string) const;
+
+  // Returns the value associated with the given switch.  If the
+  // switch has no value or isn't present, this method returns
+  // the empty string.
+  std::wstring GetSwitchValue(const std::wstring& switch_string) const;
+
+  // Get the remaining arguments to the command.
+  // WARNING: this is incorrect on POSIX; we must do string conversions.
+  std::vector<std::wstring> GetLooseValues() const;
+
+#if defined(OS_WIN)
+  // Returns the original command line string.
+  const std::wstring& command_line_string() const {
+    return command_line_string_;
+  }
+#elif defined(OS_POSIX)
+  // Returns the original command line string as a vector of strings.
+  const std::vector<std::string>& argv() const { return argv_; }
+#endif
+
+  // Returns the program part of the command line string (the first item).
+  std::wstring program() const;
+
+  // Return a copy of the string prefixed with a switch prefix.
+  // Used internally.
+  static std::wstring PrefixedSwitchString(const std::wstring& switch_string);
+
+  // Return a copy of the string prefixed with a switch prefix,
+  // and appended with the given value. Used internally.
+  static std::wstring PrefixedSwitchStringWithValue(
+      const std::wstring& switch_string, const std::wstring& value_string);
+
+  // Appends the given switch string (preceded by a space and a switch
+  // prefix) to the given string.
+  void AppendSwitch(const std::wstring& switch_string);
+
+  // Appends the given switch string (preceded by a space and a switch
+  // prefix) to the given string, with the given value attached.
+  void AppendSwitchWithValue(const std::wstring& switch_string,
+                             const std::wstring& value_string);
+
+  // Append a loose value to the command line.
+  void AppendLooseValue(const std::wstring& value);
+
+#if defined(OS_WIN)
+  void AppendLooseValue(const wchar_t* value) {
+    AppendLooseValue(std::wstring(value));
+  }
+#endif
+
+  // Append the arguments from another command line to this one.
+  // If |include_program| is true, include |other|'s program as well.
+  void AppendArguments(const CommandLine& other, bool include_program);
+
+  // On POSIX systems it's common to run processes via a wrapper (like
+  // "valgrind" or "gdb --args").
+  void PrependWrapper(const std::wstring& wrapper);
+
+ private:
+  friend class InProcessBrowserTest;
+
+  CommandLine() {}
+
+  // Used by InProcessBrowserTest.
+  static CommandLine* ForCurrentProcessMutable() {
+    DCHECK(current_process_commandline_);
+    return current_process_commandline_;
+  }
+
+  // The singleton CommandLine instance representing the current process's
+  // command line.
+  static CommandLine* current_process_commandline_;
+
+  // We store a platform-native version of the command line, used when building
+  // up a new command line to be executed.  This ifdef delimits that code.
+
+#if defined(OS_WIN)
+  // The quoted, space-separated command-line string.
+  std::wstring command_line_string_;
+
+  // The name of the program.
+  std::wstring program_;
+
+  // The type of native command line arguments.
+  typedef std::wstring StringType;
+
+#elif defined(OS_POSIX)
+  // The argv array, with the program name in argv_[0].
+  std::vector<std::string> argv_;
+
+  // The type of native command line arguments.
+  typedef std::string StringType;
+
+  // Shared by the two POSIX constructor forms.  Initalize from argv_.
+  void InitFromArgv();
+#endif
+
+  // Returns true and fills in |switch_string| and |switch_value|
+  // if |parameter_string| represents a switch.
+  static bool IsSwitch(const StringType& parameter_string,
+                       std::string* switch_string, StringType* switch_value);
+
+  // Parsed-out values.
+  std::map<std::string, StringType> switches_;
+
+  // Non-switch command-line arguments.
+  std::vector<StringType> loose_values_;
+
+  // We allow copy constructors, because a common pattern is to grab a
+  // copy of the current process's command line and then add some
+  // flags to it.  E.g.:
+  //   CommandLine cl(*CommandLine::ForCurrentProcess());
+  //   cl.AppendSwitch(...);
+};
+
+#endif  // BASE_COMMAND_LINE_H_
diff --git a/ipc/chromium/src/base/compiler_specific.h b/ipc/chromium/src/base/compiler_specific.h
new file mode 100644
index 0000000000..fef0e0095d
--- /dev/null
+++ b/ipc/chromium/src/base/compiler_specific.h
@@ -0,0 +1,81 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_COMPILER_SPECIFIC_H_
+#define BASE_COMPILER_SPECIFIC_H_
+
+#include "build/build_config.h"
+
+#if defined(COMPILER_MSVC)
+
+// Macros for suppressing and disabling warnings on MSVC.
+//
+// Warning numbers are enumerated at:
+// http://msdn.microsoft.com/en-us/library/8x5x43k7(VS.80).aspx
+//
+// The warning pragma:
+// http://msdn.microsoft.com/en-us/library/2c8f766e(VS.80).aspx
+//
+// Using __pragma instead of #pragma inside macros:
+// http://msdn.microsoft.com/en-us/library/d9x1s805.aspx
+
+// MSVC_SUPPRESS_WARNING disables warning |n| for the remainder of the line and
+// for the next line of the source file.
+#  define MSVC_SUPPRESS_WARNING(n) __pragma(warning(suppress : n))
+
+// MSVC_PUSH_DISABLE_WARNING pushes |n| onto a stack of warnings to be disabled.
+// The warning remains disabled until popped by MSVC_POP_WARNING.
+#  define MSVC_PUSH_DISABLE_WARNING(n) \
+    __pragma(warning(push)) __pragma(warning(disable : n))
+
+// MSVC_PUSH_WARNING_LEVEL pushes |n| as the global warning level.  The level
+// remains in effect until popped by MSVC_POP_WARNING().  Use 0 to disable all
+// warnings.
+#  define MSVC_PUSH_WARNING_LEVEL(n) __pragma(warning(push, n))
+
+// Pop effects of innermost MSVC_PUSH_* macro.
+#  define MSVC_POP_WARNING() __pragma(warning(pop))
+
+#  define MSVC_DISABLE_OPTIMIZE() __pragma(optimize("", off))
+#  define MSVC_ENABLE_OPTIMIZE() __pragma(optimize("", on))
+
+// Allows |this| to be passed as an argument in constructor initializer lists.
+// This uses push/pop instead of the seemingly simpler suppress feature to avoid
+// having the warning be disabled for more than just |code|.
+//
+// Example usage:
+// Foo::Foo() : x(NULL), ALLOW_THIS_IN_INITIALIZER_LIST(y(this)), z(3) {}
+//
+// Compiler warning C4355: 'this': used in base member initializer list:
+// http://msdn.microsoft.com/en-us/library/3c594ae3(VS.80).aspx
+#  define ALLOW_THIS_IN_INITIALIZER_LIST(code) \
+    MSVC_PUSH_DISABLE_WARNING(4355)            \
+    code MSVC_POP_WARNING()
+
+#else  // Not MSVC
+
+#  define MSVC_SUPPRESS_WARNING(n)
+#  define MSVC_PUSH_DISABLE_WARNING(n)
+#  define MSVC_PUSH_WARNING_LEVEL(n)
+#  define MSVC_POP_WARNING()
+#  define MSVC_DISABLE_OPTIMIZE()
+#  define MSVC_ENABLE_OPTIMIZE()
+#  define ALLOW_THIS_IN_INITIALIZER_LIST(code) code
+
+#endif  // COMPILER_MSVC
+
+// Annotate a function indicating the caller must examine the return value.
+// Use like:
+//   int foo() WARN_UNUSED_RESULT;
+// To explicitly ignore a result, see |ignore_result()| in base/macros.h.
+#undef WARN_UNUSED_RESULT
+#if defined(COMPILER_GCC) || defined(__clang__)
+#  define WARN_UNUSED_RESULT __attribute__((warn_unused_result))
+#else
+#  define WARN_UNUSED_RESULT
+#endif
+
+#endif  // BASE_COMPILER_SPECIFIC_H_
diff --git a/ipc/chromium/src/base/condition_variable.h b/ipc/chromium/src/base/condition_variable.h
new file mode 100644
index 0000000000..864479ec28
--- /dev/null
+++ b/ipc/chromium/src/base/condition_variable.h
@@ -0,0 +1,117 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// ConditionVariable wraps pthreads condition variable synchronization or, on
+// Windows, simulates it.  This functionality is very helpful for having
+// several threads wait for an event, as is common with a managed thread pool.
+// The meaning of such an event in the (worker) thread pool scenario is that
+// additional tasks are now available for processing. It is used in Chrome in
+// the DNS prefetching system to notify worker threads that a queue now has
+// items (tasks) which need to be tended to. A related use would have a pool
+// manager waiting on a ConditionVariable, waiting for a thread in the pool to
+// announce (signal) that there is now more room in a (bounded size)
+// communications queue for the manager to deposit tasks, or, as a second
+// example, that the queue of tasks is completely empty and all workers are
+// waiting.
+//
+// USAGE NOTE 1: spurious signal events are possible with this and
+// most implementations of condition variables.  As a result, be
+// *sure* to retest your condition before proceeding.  The following
+// is a good example of doing this correctly:
+//
+// while (!work_to_be_done()) Wait(...);
+//
+// In contrast do NOT do the following:
+//
+// if (!work_to_be_done()) Wait(...);  // Don't do this.
+//
+// Especially avoid the above if you are relying on some other thread only
+// issuing a signal up *if* there is work-to-do.  There can/will
+// be spurious signals.  Recheck state on waiting thread before
+// assuming the signal was intentional. Caveat caller ;-).
+//
+// USAGE NOTE 2: Broadcast() frees up all waiting threads at once,
+// which leads to contention for the locks they all held when they
+// called Wait().  This results in POOR performance.  A much better
+// approach to getting a lot of threads out of Wait() is to have each
+// thread (upon exiting Wait()) call Signal() to free up another
+// Wait'ing thread.  Look at condition_variable_unittest.cc for
+// both examples.
+//
+// Broadcast() can be used nicely during teardown, as it gets the job
+// done, and leaves no sleeping threads... and performance is less
+// critical at that point.
+//
+// The semantics of Broadcast() are carefully crafted so that *all*
+// threads that were waiting when the request was made will indeed
+// get signaled.  Some implementations mess up, and don't signal them
+// all, while others allow the wait to be effectively turned off (for
+// a while while waiting threads come around).  This implementation
+// appears correct, as it will not "lose" any signals, and will guarantee
+// that all threads get signaled by Broadcast().
+//
+// This implementation offers support for "performance" in its selection of
+// which thread to revive.  Performance, in direct contrast with "fairness,"
+// assures that the thread that most recently began to Wait() is selected by
+// Signal to revive.  Fairness would (if publicly supported) assure that the
+// thread that has Wait()ed the longest is selected. The default policy
+// may improve performance, as the selected thread may have a greater chance of
+// having some of its stack data in various CPU caches.
+//
+// For a discussion of the many very subtle implementation details, see the FAQ
+// at the end of condition_variable_win.cc.
+
+#ifndef BASE_CONDITION_VARIABLE_H_
+#define BASE_CONDITION_VARIABLE_H_
+
+#include "base/basictypes.h"
+#include "base/lock.h"
+#include "build/build_config.h"
+
+#if defined(OS_POSIX)
+#  include <pthread.h>
+#endif
+
+#if defined(OS_WIN)
+#  include <windows.h>
+#endif
+
+namespace base {
+class TimeDelta;
+}
+
+class ConditionVariable {
+ public:
+  // Construct a cv for use with ONLY one user lock.
+  explicit ConditionVariable(Lock* user_lock);
+
+  ~ConditionVariable();
+
+  // Wait() releases the caller's critical section atomically as it starts to
+  // sleep, and the reacquires it when it is signaled. The wait functions are
+  // susceptible to spurious wakeups. (See usage note 1 for more details.)
+  void Wait();
+  void TimedWait(const base::TimeDelta& max_time);
+
+  // Broadcast() revives all waiting threads. (See usage note 2 for more
+  // details.)
+  void Broadcast();
+  // Signal() revives one waiting thread.
+  void Signal();
+
+ private:
+#if defined(OS_WIN)
+  CONDITION_VARIABLE cv_;
+  SRWLOCK* const srwlock_;
+#elif defined(OS_POSIX)
+  pthread_cond_t condition_;
+  pthread_mutex_t* user_mutex_;
+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(ConditionVariable);
+};
+
+#endif  // BASE_CONDITION_VARIABLE_H_
diff --git a/ipc/chromium/src/base/condition_variable_posix.cc b/ipc/chromium/src/base/condition_variable_posix.cc
new file mode 100644
index 0000000000..891555389e
--- /dev/null
+++ b/ipc/chromium/src/base/condition_variable_posix.cc
@@ -0,0 +1,119 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/condition_variable.h"
+
+#include <errno.h>
+#include <stdint.h>
+#include <sys/time.h>
+
+#include "base/lock.h"
+#include "base/logging.h"
+#include "base/time.h"
+#include "build/build_config.h"
+
+ConditionVariable::ConditionVariable(Lock* user_lock)
+    : user_mutex_(user_lock->lock_.native_handle()) {
+  int rv = 0;
+  // http://crbug.com/293736
+  // NaCl doesn't support monotonic clock based absolute deadlines.
+  // On older Android platform versions, it's supported through the
+  // non-standard pthread_cond_timedwait_monotonic_np. Newer platform
+  // versions have pthread_condattr_setclock.
+  // Mac can use relative time deadlines.
+#if !defined(OS_MACOSX) && !defined(OS_NACL) && \
+    !(defined(OS_ANDROID) && defined(HAVE_PTHREAD_COND_TIMEDWAIT_MONOTONIC))
+  pthread_condattr_t attrs;
+  rv = pthread_condattr_init(&attrs);
+  DCHECK_EQ(0, rv);
+  pthread_condattr_setclock(&attrs, CLOCK_MONOTONIC);
+  rv = pthread_cond_init(&condition_, &attrs);
+  pthread_condattr_destroy(&attrs);
+#else
+  rv = pthread_cond_init(&condition_, NULL);
+#endif
+  DCHECK_EQ(0, rv);
+}
+
+ConditionVariable::~ConditionVariable() {
+#if defined(OS_MACOSX)
+  // This hack is necessary to avoid a fatal pthreads subsystem bug in the
+  // Darwin kernel. http://crbug.com/517681.
+  {
+    Lock lock;
+    AutoLock l(lock);
+    struct timespec ts;
+    ts.tv_sec = 0;
+    ts.tv_nsec = 1;
+    pthread_cond_timedwait_relative_np(&condition_, lock.lock_.native_handle(),
+                                       &ts);
+  }
+#endif
+
+  int rv = pthread_cond_destroy(&condition_);
+  DCHECK_EQ(0, rv);
+}
+
+void ConditionVariable::Wait() {
+  int rv = pthread_cond_wait(&condition_, user_mutex_);
+  DCHECK_EQ(0, rv);
+}
+
+void ConditionVariable::TimedWait(const base::TimeDelta& max_time) {
+  int64_t usecs = max_time.InMicroseconds();
+  struct timespec relative_time;
+  relative_time.tv_sec = usecs / base::Time::kMicrosecondsPerSecond;
+  relative_time.tv_nsec = (usecs % base::Time::kMicrosecondsPerSecond) *
+                          base::Time::kNanosecondsPerMicrosecond;
+
+#if defined(OS_MACOSX)
+  int rv = pthread_cond_timedwait_relative_np(&condition_, user_mutex_,
+                                              &relative_time);
+#else
+  // The timeout argument to pthread_cond_timedwait is in absolute time.
+  struct timespec absolute_time;
+#  if defined(OS_NACL)
+  // See comment in constructor for why this is different in NaCl.
+  struct timeval now;
+  gettimeofday(&now, NULL);
+  absolute_time.tv_sec = now.tv_sec;
+  absolute_time.tv_nsec = now.tv_usec * base::Time::kNanosecondsPerMicrosecond;
+#  else
+  struct timespec now;
+  clock_gettime(CLOCK_MONOTONIC, &now);
+  absolute_time.tv_sec = now.tv_sec;
+  absolute_time.tv_nsec = now.tv_nsec;
+#  endif
+
+  absolute_time.tv_sec += relative_time.tv_sec;
+  absolute_time.tv_nsec += relative_time.tv_nsec;
+  absolute_time.tv_sec +=
+      absolute_time.tv_nsec / base::Time::kNanosecondsPerSecond;
+  absolute_time.tv_nsec %= base::Time::kNanosecondsPerSecond;
+  DCHECK_GE(absolute_time.tv_sec, now.tv_sec);  // Overflow paranoia
+
+#  if defined(OS_ANDROID) && defined(HAVE_PTHREAD_COND_TIMEDWAIT_MONOTONIC)
+  int rv = pthread_cond_timedwait_monotonic_np(&condition_, user_mutex_,
+                                               &absolute_time);
+#  else
+  int rv = pthread_cond_timedwait(&condition_, user_mutex_, &absolute_time);
+#  endif  // OS_ANDROID && HAVE_PTHREAD_COND_TIMEDWAIT_MONOTONIC
+#endif    // OS_MACOSX
+
+  // On failure, we only expect the CV to timeout. Any other error value means
+  // that we've unexpectedly woken up.
+  DCHECK(rv == 0 || rv == ETIMEDOUT);
+}
+
+void ConditionVariable::Broadcast() {
+  int rv = pthread_cond_broadcast(&condition_);
+  DCHECK_EQ(0, rv);
+}
+
+void ConditionVariable::Signal() {
+  int rv = pthread_cond_signal(&condition_);
+  DCHECK_EQ(0, rv);
+}
diff --git a/ipc/chromium/src/base/condition_variable_win.cc b/ipc/chromium/src/base/condition_variable_win.cc
new file mode 100644
index 0000000000..35d79ba2ec
--- /dev/null
+++ b/ipc/chromium/src/base/condition_variable_win.cc
@@ -0,0 +1,40 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/condition_variable.h"
+
+#include "base/lock.h"
+#include "base/logging.h"
+#include "base/time.h"
+
+ConditionVariable::ConditionVariable(Lock* user_lock)
+    : srwlock_(user_lock->lock_.native_handle()) {
+  DCHECK(user_lock);
+  InitializeConditionVariable(&cv_);
+}
+
+ConditionVariable::~ConditionVariable() = default;
+
+void ConditionVariable::Wait() {
+  TimedWait(base::TimeDelta::FromMilliseconds(INFINITE));
+}
+
+void ConditionVariable::TimedWait(const base::TimeDelta& max_time) {
+  DWORD timeout = static_cast<DWORD>(max_time.InMilliseconds());
+
+  if (!SleepConditionVariableSRW(&cv_, srwlock_, timeout, 0)) {
+    // On failure, we only expect the CV to timeout. Any other error value means
+    // that we've unexpectedly woken up.
+    // Note that WAIT_TIMEOUT != ERROR_TIMEOUT. WAIT_TIMEOUT is used with the
+    // WaitFor* family of functions as a direct return value. ERROR_TIMEOUT is
+    // used with GetLastError().
+    DCHECK_EQ(static_cast<DWORD>(ERROR_TIMEOUT), GetLastError());
+  }
+}
+
+void ConditionVariable::Broadcast() { WakeAllConditionVariable(&cv_); }
+
+void ConditionVariable::Signal() { WakeConditionVariable(&cv_); }
diff --git a/ipc/chromium/src/base/dir_reader_bsd.h b/ipc/chromium/src/base/dir_reader_bsd.h
new file mode 100644
index 0000000000..12812cbc4d
--- /dev/null
+++ b/ipc/chromium/src/base/dir_reader_bsd.h
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// derived from dir_reader_linux.h
+
+#ifndef BASE_DIR_READER_BSD_H_
+#define BASE_DIR_READER_BSD_H_
+#pragma once
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <unistd.h>
+
+#include "base/logging.h"
+#include "base/eintr_wrapper.h"
+
+// See the comments in dir_reader_posix.h about this.
+
+namespace base {
+
+class DirReaderBSD {
+ public:
+  explicit DirReaderBSD(const char* directory_path)
+#ifdef O_DIRECTORY
+      : fd_(open(directory_path, O_RDONLY | O_DIRECTORY)),
+#else
+      : fd_(open(directory_path, O_RDONLY)),
+#endif
+        offset_(0),
+        size_(0) {
+    memset(buf_, 0, sizeof(buf_));
+  }
+
+  ~DirReaderBSD() {
+    if (fd_ >= 0) {
+      if (IGNORE_EINTR(close(fd_)))
+        DLOG(ERROR) << "Failed to close directory handle";
+    }
+  }
+
+  bool IsValid() const { return fd_ >= 0; }
+
+  // Move to the next entry returning false if the iteration is complete.
+  bool Next() {
+    if (size_) {
+      struct dirent* dirent = reinterpret_cast<struct dirent*>(&buf_[offset_]);
+#ifdef OS_DRAGONFLY
+      offset_ += _DIRENT_DIRSIZ(dirent);
+#else
+      offset_ += dirent->d_reclen;
+#endif
+    }
+
+    if (offset_ != size_) return true;
+
+    const int r = getdents(fd_, buf_, sizeof(buf_));
+    if (r == 0) return false;
+    if (r == -1) {
+      DLOG(ERROR) << "getdents returned an error: " << errno;
+      return false;
+    }
+    size_ = r;
+    offset_ = 0;
+    return true;
+  }
+
+  const char* name() const {
+    if (!size_) return NULL;
+
+    const struct dirent* dirent =
+        reinterpret_cast<const struct dirent*>(&buf_[offset_]);
+    return dirent->d_name;
+  }
+
+  int fd() const { return fd_; }
+
+  static bool IsFallback() { return false; }
+
+ private:
+  const int fd_;
+  char buf_[512];
+  size_t offset_, size_;
+
+  DISALLOW_COPY_AND_ASSIGN(DirReaderBSD);
+};
+
+}  // namespace base
+
+#endif  // BASE_DIR_READER_BSD_H_
diff --git a/ipc/chromium/src/base/dir_reader_fallback.h b/ipc/chromium/src/base/dir_reader_fallback.h
new file mode 100644
index 0000000000..5fbf658d49
--- /dev/null
+++ b/ipc/chromium/src/base/dir_reader_fallback.h
@@ -0,0 +1,33 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_DIR_READER_FALLBACK_H_
+#define BASE_DIR_READER_FALLBACK_H_
+#pragma once
+
+namespace base {
+
+class DirReaderFallback {
+ public:
+  // Open a directory. If |IsValid| is true, then |Next| can be called to start
+  // the iteration at the beginning of the directory.
+  explicit DirReaderFallback(const char* directory_path) {}
+  // After construction, IsValid returns true iff the directory was
+  // successfully opened.
+  bool IsValid() const { return false; }
+  // Move to the next entry returning false if the iteration is complete.
+  bool Next() { return false; }
+  // Return the name of the current directory entry.
+  const char* name() { return 0; }
+  // Return the file descriptor which is being used.
+  int fd() const { return -1; }
+  // Returns true if this is a no-op fallback class (for testing).
+  static bool IsFallback() { return true; }
+};
+
+}  // namespace base
+
+#endif  // BASE_DIR_READER_FALLBACK_H_
diff --git a/ipc/chromium/src/base/dir_reader_linux.h b/ipc/chromium/src/base/dir_reader_linux.h
new file mode 100644
index 0000000000..a70ff3bb64
--- /dev/null
+++ b/ipc/chromium/src/base/dir_reader_linux.h
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_DIR_READER_LINUX_H_
+#define BASE_DIR_READER_LINUX_H_
+#pragma once
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#include "base/logging.h"
+#include "base/eintr_wrapper.h"
+
+// See the comments in dir_reader_posix.h about this.
+
+namespace base {
+
+struct linux_dirent {
+  uint64_t d_ino;
+  int64_t d_off;
+  unsigned short d_reclen;
+  unsigned char d_type;
+  char d_name[0];
+};
+
+class DirReaderLinux {
+ public:
+  explicit DirReaderLinux(const char* directory_path)
+      : fd_(open(directory_path, O_RDONLY | O_DIRECTORY)),
+        offset_(0),
+        size_(0) {
+    memset(buf_, 0, sizeof(buf_));
+  }
+
+  ~DirReaderLinux() {
+    if (fd_ >= 0) {
+      if (IGNORE_EINTR(close(fd_)))
+        DLOG(ERROR) << "Failed to close directory handle";
+    }
+  }
+
+  bool IsValid() const { return fd_ >= 0; }
+
+  // Move to the next entry returning false if the iteration is complete.
+  bool Next() {
+    if (size_) {
+      linux_dirent* dirent = reinterpret_cast<linux_dirent*>(&buf_[offset_]);
+      offset_ += dirent->d_reclen;
+    }
+
+    if (offset_ != size_) return true;
+
+    const int r = syscall(__NR_getdents64, fd_, buf_, sizeof(buf_));
+    if (r == 0) return false;
+    if (r == -1) {
+      DLOG(ERROR) << "getdents64 returned an error: " << errno;
+      return false;
+    }
+    size_ = r;
+    offset_ = 0;
+    return true;
+  }
+
+  const char* name() const {
+    if (!size_) return NULL;
+
+    const linux_dirent* dirent =
+        reinterpret_cast<const linux_dirent*>(&buf_[offset_]);
+    return dirent->d_name;
+  }
+
+  int fd() const { return fd_; }
+
+  static bool IsFallback() { return false; }
+
+ private:
+  const int fd_;
+  union {
+    linux_dirent dirent_;
+    unsigned char buf_[512];
+  };
+  size_t offset_, size_;
+
+  DISALLOW_COPY_AND_ASSIGN(DirReaderLinux);
+};
+
+}  // namespace base
+
+#endif  // BASE_DIR_READER_LINUX_H_
diff --git a/ipc/chromium/src/base/dir_reader_posix.h b/ipc/chromium/src/base/dir_reader_posix.h
new file mode 100644
index 0000000000..4fabd25083
--- /dev/null
+++ b/ipc/chromium/src/base/dir_reader_posix.h
@@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_DIR_READER_POSIX_H_
+#define BASE_DIR_READER_POSIX_H_
+#pragma once
+
+#include "build/build_config.h"
+
+// This header provides a class, DirReaderPosix, which allows one to open and
+// read from directories without allocating memory. For the interface, see
+// the generic fallback in dir_reader_fallback.h.
+
+// Mac note: OS X has getdirentries, but it only works if we restrict Chrome to
+// 32-bit inodes. There is a getdirentries64 syscall in 10.6, but it's not
+// wrapped and the direct syscall interface is unstable. Using an unstable API
+// seems worse than falling back to enumerating all file descriptors so we will
+// probably never implement this on the Mac.
+
+#if defined(OS_LINUX)
+#  include "base/dir_reader_linux.h"
+#elif defined(OS_BSD) && !defined(__GLIBC__)
+#  include "base/dir_reader_bsd.h"
+#else
+#  include "base/dir_reader_fallback.h"
+#endif
+
+namespace base {
+
+#if defined(OS_LINUX)
+typedef DirReaderLinux DirReaderPosix;
+#elif defined(OS_BSD) && !defined(__GLIBC__)
+typedef DirReaderBSD DirReaderPosix;
+#else
+typedef DirReaderFallback DirReaderPosix;
+#endif
+
+}  // namespace base
+
+#endif  // BASE_DIR_READER_POSIX_H_
diff --git a/ipc/chromium/src/base/eintr_wrapper.h b/ipc/chromium/src/base/eintr_wrapper.h
new file mode 100644
index 0000000000..c4a8b1a0ad
--- /dev/null
+++ b/ipc/chromium/src/base/eintr_wrapper.h
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This provides a wrapper around system calls which may be interrupted by a
+// signal and return EINTR. See man 7 signal.
+//
+// On Windows, this wrapper macro does nothing because there are no
+// signals.
+//
+// Don't wrap close calls in HANDLE_EINTR. Use IGNORE_EINTR if the return
+// value of close is significant. See http://crbug.com/269623.
+
+#ifndef BASE_EINTR_WRAPPER_H_
+#define BASE_EINTR_WRAPPER_H_
+
+#include "build/build_config.h"
+
+#if defined(OS_POSIX)
+
+#  include <errno.h>
+
+#  define HANDLE_EINTR(x)                                     \
+    ({                                                        \
+      decltype(x) eintr_wrapper_result;                       \
+      do {                                                    \
+        eintr_wrapper_result = (x);                           \
+      } while (eintr_wrapper_result == -1 && errno == EINTR); \
+      eintr_wrapper_result;                                   \
+    })
+
+#  define IGNORE_EINTR(x)                                   \
+    ({                                                      \
+      decltype(x) eintr_wrapper_result;                     \
+      do {                                                  \
+        eintr_wrapper_result = (x);                         \
+        if (eintr_wrapper_result == -1 && errno == EINTR) { \
+          eintr_wrapper_result = 0;                         \
+        }                                                   \
+      } while (0);                                          \
+      eintr_wrapper_result;                                 \
+    })
+
+#  define HANDLE_RV_EINTR(x)                   \
+    ({                                         \
+      decltype(x) eintr_wrapper_result;        \
+      do {                                     \
+        eintr_wrapper_result = (x);            \
+      } while (eintr_wrapper_result == EINTR); \
+      eintr_wrapper_result;                    \
+    })
+
+#else
+
+#  define HANDLE_EINTR(x) (x)
+#  define IGNORE_EINTR(x) (x)
+#  define HANDLE_RV_EINTR(x) (x)
+
+#endif  // OS_POSIX
+
+#endif  // !BASE_EINTR_WRAPPER_H_
diff --git a/ipc/chromium/src/base/file_path.cc b/ipc/chromium/src/base/file_path.cc
new file mode 100644
index 0000000000..6afb7d9b86
--- /dev/null
+++ b/ipc/chromium/src/base/file_path.cc
@@ -0,0 +1,313 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <fstream>
+
+#include "base/file_path.h"
+#include "base/logging.h"
+
+// These includes are just for the *Hack functions, and should be removed
+// when those functions are removed.
+#include "base/string_piece.h"
+#include "base/string_util.h"
+#include "base/sys_string_conversions.h"
+
+#if defined(FILE_PATH_USES_WIN_SEPARATORS)
+const FilePath::CharType FilePath::kSeparators[] = FILE_PATH_LITERAL("\\/");
+#else   // FILE_PATH_USES_WIN_SEPARATORS
+const FilePath::CharType FilePath::kSeparators[] = FILE_PATH_LITERAL("/");
+#endif  // FILE_PATH_USES_WIN_SEPARATORS
+
+const FilePath::CharType FilePath::kCurrentDirectory[] = FILE_PATH_LITERAL(".");
+const FilePath::CharType FilePath::kParentDirectory[] = FILE_PATH_LITERAL("..");
+
+const FilePath::CharType FilePath::kExtensionSeparator = FILE_PATH_LITERAL('.');
+
+namespace {
+
+// If this FilePath contains a drive letter specification, returns the
+// position of the last character of the drive letter specification,
+// otherwise returns npos.  This can only be true on Windows, when a pathname
+// begins with a letter followed by a colon.  On other platforms, this always
+// returns npos.
+FilePath::StringType::size_type FindDriveLetter(
+    const FilePath::StringType& path) {
+#if defined(FILE_PATH_USES_DRIVE_LETTERS)
+  // This is dependent on an ASCII-based character set, but that's a
+  // reasonable assumption.  iswalpha can be too inclusive here.
+  if (path.length() >= 2 && path[1] == L':' &&
+      ((path[0] >= L'A' && path[0] <= L'Z') ||
+       (path[0] >= L'a' && path[0] <= L'z'))) {
+    return 1;
+  }
+#endif  // FILE_PATH_USES_DRIVE_LETTERS
+  return FilePath::StringType::npos;
+}
+
+bool IsPathAbsolute(const FilePath::StringType& path) {
+#if defined(FILE_PATH_USES_DRIVE_LETTERS)
+  FilePath::StringType::size_type letter = FindDriveLetter(path);
+  if (letter != FilePath::StringType::npos) {
+    // Look for a separator right after the drive specification.
+    return path.length() > letter + 1 &&
+           FilePath::IsSeparator(path[letter + 1]);
+  }
+  // Look for a pair of leading separators.
+  return path.length() > 1 && FilePath::IsSeparator(path[0]) &&
+         FilePath::IsSeparator(path[1]);
+#else   // FILE_PATH_USES_DRIVE_LETTERS
+  // Look for a separator in the first position.
+  return path.length() > 0 && FilePath::IsSeparator(path[0]);
+#endif  // FILE_PATH_USES_DRIVE_LETTERS
+}
+
+}  // namespace
+
+bool FilePath::IsSeparator(CharType character) {
+  for (size_t i = 0; i < arraysize(kSeparators) - 1; ++i) {
+    if (character == kSeparators[i]) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// libgen's dirname and basename aren't guaranteed to be thread-safe and aren't
+// guaranteed to not modify their input strings, and in fact are implemented
+// differently in this regard on different platforms.  Don't use them, but
+// adhere to their behavior.
+FilePath FilePath::DirName() const {
+  FilePath new_path(path_);
+  new_path.StripTrailingSeparatorsInternal();
+
+  // The drive letter, if any, always needs to remain in the output.  If there
+  // is no drive letter, as will always be the case on platforms which do not
+  // support drive letters, letter will be npos, or -1, so the comparisons and
+  // resizes below using letter will still be valid.
+  StringType::size_type letter = FindDriveLetter(new_path.path_);
+
+  StringType::size_type last_separator = new_path.path_.find_last_of(
+      kSeparators, StringType::npos, arraysize(kSeparators) - 1);
+  if (last_separator == StringType::npos) {
+    // path_ is in the current directory.
+    new_path.path_.resize(letter + 1);
+  } else if (last_separator == letter + 1) {
+    // path_ is in the root directory.
+    new_path.path_.resize(letter + 2);
+  } else if (last_separator == letter + 2 &&
+             IsSeparator(new_path.path_[letter + 1])) {
+    // path_ is in "//" (possibly with a drive letter); leave the double
+    // separator intact indicating alternate root.
+    new_path.path_.resize(letter + 3);
+  } else if (last_separator != 0) {
+    // path_ is somewhere else, trim the basename.
+    new_path.path_.resize(last_separator);
+  }
+
+  new_path.StripTrailingSeparatorsInternal();
+  if (!new_path.path_.length()) new_path.path_ = kCurrentDirectory;
+
+  return new_path;
+}
+
+FilePath FilePath::BaseName() const {
+  FilePath new_path(path_);
+  new_path.StripTrailingSeparatorsInternal();
+
+  // The drive letter, if any, is always stripped.
+  StringType::size_type letter = FindDriveLetter(new_path.path_);
+  if (letter != StringType::npos) {
+    new_path.path_.erase(0, letter + 1);
+  }
+
+  // Keep everything after the final separator, but if the pathname is only
+  // one character and it's a separator, leave it alone.
+  StringType::size_type last_separator = new_path.path_.find_last_of(
+      kSeparators, StringType::npos, arraysize(kSeparators) - 1);
+  if (last_separator != StringType::npos &&
+      last_separator < new_path.path_.length() - 1) {
+    new_path.path_.erase(0, last_separator + 1);
+  }
+
+  return new_path;
+}
+
+FilePath::StringType FilePath::Extension() const {
+  // BaseName() calls StripTrailingSeparators, so cases like /foo.baz/// work.
+  StringType base = BaseName().value();
+
+  // Special case "." and ".."
+  if (base == kCurrentDirectory || base == kParentDirectory)
+    return StringType();
+
+  const StringType::size_type last_dot = base.rfind(kExtensionSeparator);
+  if (last_dot == StringType::npos) return StringType();
+  return StringType(base, last_dot);
+}
+
+FilePath FilePath::RemoveExtension() const {
+  StringType ext = Extension();
+  // It's important to check Extension() since that verifies that the
+  // kExtensionSeparator actually appeared in the last path component.
+  if (ext.empty()) return FilePath(path_);
+  // Since Extension() verified that the extension is in fact in the last path
+  // component, this substr will effectively strip trailing separators.
+  const StringType::size_type last_dot = path_.rfind(kExtensionSeparator);
+  return FilePath(path_.substr(0, last_dot));
+}
+
+FilePath FilePath::InsertBeforeExtension(const StringType& suffix) const {
+  if (suffix.empty()) return FilePath(path_);
+
+  if (path_.empty()) return FilePath();
+
+  StringType base = BaseName().value();
+  if (base.empty()) return FilePath();
+  if (*(base.end() - 1) == kExtensionSeparator) {
+    // Special case "." and ".."
+    if (base == kCurrentDirectory || base == kParentDirectory) {
+      return FilePath();
+    }
+  }
+
+  StringType ext = Extension();
+  StringType ret = RemoveExtension().value();
+  ret.append(suffix);
+  ret.append(ext);
+  return FilePath(ret);
+}
+
+FilePath FilePath::ReplaceExtension(const StringType& extension) const {
+  if (path_.empty()) return FilePath();
+
+  StringType base = BaseName().value();
+  if (base.empty()) return FilePath();
+  if (*(base.end() - 1) == kExtensionSeparator) {
+    // Special case "." and ".."
+    if (base == kCurrentDirectory || base == kParentDirectory) {
+      return FilePath();
+    }
+  }
+
+  FilePath no_ext = RemoveExtension();
+  // If the new extension is "" or ".", then just remove the current extension.
+  if (extension.empty() || extension == StringType(1, kExtensionSeparator))
+    return no_ext;
+
+  StringType str = no_ext.value();
+  if (extension[0] != kExtensionSeparator) str.append(1, kExtensionSeparator);
+  str.append(extension);
+  return FilePath(str);
+}
+
+FilePath FilePath::Append(const StringType& component) const {
+  DCHECK(!IsPathAbsolute(component));
+  if (path_.compare(kCurrentDirectory) == 0) {
+    // Append normally doesn't do any normalization, but as a special case,
+    // when appending to kCurrentDirectory, just return a new path for the
+    // component argument.  Appending component to kCurrentDirectory would
+    // serve no purpose other than needlessly lengthening the path, and
+    // it's likely in practice to wind up with FilePath objects containing
+    // only kCurrentDirectory when calling DirName on a single relative path
+    // component.
+    return FilePath(component);
+  }
+
+  FilePath new_path(path_);
+  new_path.StripTrailingSeparatorsInternal();
+
+  // Don't append a separator if the path is empty (indicating the current
+  // directory) or if the path component is empty (indicating nothing to
+  // append).
+  if (component.length() > 0 && new_path.path_.length() > 0) {
+    // Don't append a separator if the path still ends with a trailing
+    // separator after stripping (indicating the root directory).
+    if (!IsSeparator(new_path.path_[new_path.path_.length() - 1])) {
+      // Don't append a separator if the path is just a drive letter.
+      if (FindDriveLetter(new_path.path_) + 1 != new_path.path_.length()) {
+        new_path.path_.append(1, kSeparators[0]);
+      }
+    }
+  }
+
+  new_path.path_.append(component);
+  return new_path;
+}
+
+FilePath FilePath::Append(const FilePath& component) const {
+  return Append(component.value());
+}
+
+FilePath FilePath::AppendASCII(const std::string& component) const {
+  DCHECK(IsStringASCII(component));
+#if defined(OS_WIN)
+  return Append(ASCIIToWide(component));
+#elif defined(OS_POSIX)
+  return Append(component);
+#endif
+}
+
+bool FilePath::IsAbsolute() const { return IsPathAbsolute(path_); }
+
+#if defined(OS_POSIX)
+// See file_path.h for a discussion of the encoding of paths on POSIX
+// platforms.  These *Hack() functions are not quite correct, but they're
+// only temporary while we fix the remainder of the code.
+// Remember to remove the #includes at the top when you remove these.
+
+// static
+FilePath FilePath::FromWStringHack(const std::wstring& wstring) {
+  return FilePath(base::SysWideToNativeMB(wstring));
+}
+std::wstring FilePath::ToWStringHack() const {
+  return base::SysNativeMBToWide(path_);
+}
+#elif defined(OS_WIN)
+// static
+FilePath FilePath::FromWStringHack(const std::wstring& wstring) {
+  return FilePath(wstring);
+}
+std::wstring FilePath::ToWStringHack() const { return path_; }
+#endif
+
+void FilePath::OpenInputStream(std::ifstream& stream) const {
+  stream.open(
+#ifndef __MINGW32__
+      path_.c_str(),
+#else
+      base::SysWideToNativeMB(path_).c_str(),
+#endif
+      std::ios::in | std::ios::binary);
+}
+
+FilePath FilePath::StripTrailingSeparators() const {
+  FilePath new_path(path_);
+  new_path.StripTrailingSeparatorsInternal();
+
+  return new_path;
+}
+
+void FilePath::StripTrailingSeparatorsInternal() {
+  // If there is no drive letter, start will be 1, which will prevent stripping
+  // the leading separator if there is only one separator.  If there is a drive
+  // letter, start will be set appropriately to prevent stripping the first
+  // separator following the drive letter, if a separator immediately follows
+  // the drive letter.
+  StringType::size_type start = FindDriveLetter(path_) + 2;
+
+  StringType::size_type last_stripped = StringType::npos;
+  for (StringType::size_type pos = path_.length();
+       pos > start && IsSeparator(path_[pos - 1]); --pos) {
+    // If the string only has two separators and they're at the beginning,
+    // don't strip them, unless the string began with more than two separators.
+    if (pos != start + 1 || last_stripped == start + 2 ||
+        !IsSeparator(path_[start - 1])) {
+      path_.resize(pos - 1);
+      last_stripped = pos;
+    }
+  }
+}
diff --git a/ipc/chromium/src/base/file_path.h b/ipc/chromium/src/base/file_path.h
new file mode 100644
index 0000000000..6fe4bbdd29
--- /dev/null
+++ b/ipc/chromium/src/base/file_path.h
@@ -0,0 +1,248 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// FilePath is a container for pathnames stored in a platform's native string
+// type, providing containers for manipulation in according with the
+// platform's conventions for pathnames.  It supports the following path
+// types:
+//
+//                   POSIX            Windows
+//                   ---------------  ----------------------------------
+// Fundamental type  char[]           wchar_t[]
+// Encoding          unspecified*     UTF-16
+// Separator         /                \, tolerant of /
+// Drive letters     no               case-insensitive A-Z followed by :
+// Alternate root    // (surprise!)   \\, for UNC paths
+//
+// * The encoding need not be specified on POSIX systems, although some
+//   POSIX-compliant systems do specify an encoding.  Mac OS X uses UTF-8.
+//   Linux does not specify an encoding, but in practice, the locale's
+//   character set may be used.
+//
+// FilePath objects are intended to be used anywhere paths are.  An
+// application may pass FilePath objects around internally, masking the
+// underlying differences between systems, only differing in implementation
+// where interfacing directly with the system.  For example, a single
+// OpenFile(const FilePath &) function may be made available, allowing all
+// callers to operate without regard to the underlying implementation.  On
+// POSIX-like platforms, OpenFile might wrap fopen, and on Windows, it might
+// wrap _wfopen_s, perhaps both by calling file_path.value().c_str().  This
+// allows each platform to pass pathnames around without requiring conversions
+// between encodings, which has an impact on performance, but more imporantly,
+// has an impact on correctness on platforms that do not have well-defined
+// encodings for pathnames.
+//
+// Several methods are available to perform common operations on a FilePath
+// object, such as determining the parent directory (DirName), isolating the
+// final path component (BaseName), and appending a relative pathname string
+// to an existing FilePath object (Append).  These methods are highly
+// recommended over attempting to split and concatenate strings directly.
+// These methods are based purely on string manipulation and knowledge of
+// platform-specific pathname conventions, and do not consult the filesystem
+// at all, making them safe to use without fear of blocking on I/O operations.
+// These methods do not function as mutators but instead return distinct
+// instances of FilePath objects, and are therefore safe to use on const
+// objects.  The objects themselves are safe to share between threads.
+//
+// To aid in initialization of FilePath objects from string literals, a
+// FILE_PATH_LITERAL macro is provided, which accounts for the difference
+// between char[]-based pathnames on POSIX systems and wchar_t[]-based
+// pathnames on Windows.
+//
+// Because a FilePath object should not be instantiated at the global scope,
+// instead, use a FilePath::CharType[] and initialize it with
+// FILE_PATH_LITERAL.  At runtime, a FilePath object can be created from the
+// character array.  Example:
+//
+// | const FilePath::CharType kLogFileName[] = FILE_PATH_LITERAL("log.txt");
+// |
+// | void Function() {
+// |   FilePath log_file_path(kLogFileName);
+// |   [...]
+// | }
+
+#ifndef BASE_FILE_PATH_H_
+#define BASE_FILE_PATH_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+
+// Windows-style drive letter support and pathname separator characters can be
+// enabled and disabled independently, to aid testing.  These #defines are
+// here so that the same setting can be used in both the implementation and
+// in the unit test.
+#if defined(OS_WIN)
+#  define FILE_PATH_USES_DRIVE_LETTERS
+#  define FILE_PATH_USES_WIN_SEPARATORS
+#endif  // OS_WIN
+
+// An abstraction to isolate users from the differences between native
+// pathnames on different platforms.
+class FilePath {
+ public:
+#if defined(OS_POSIX)
+  // On most platforms, native pathnames are char arrays, and the encoding
+  // may or may not be specified.  On Mac OS X, native pathnames are encoded
+  // in UTF-8.
+  typedef std::string StringType;
+#elif defined(OS_WIN)
+  // On Windows, for Unicode-aware applications, native pathnames are wchar_t
+  // arrays encoded in UTF-16.
+  typedef std::wstring StringType;
+#endif  // OS_WIN
+
+  typedef StringType::value_type CharType;
+
+  // Null-terminated array of separators used to separate components in
+  // hierarchical paths.  Each character in this array is a valid separator,
+  // but kSeparators[0] is treated as the canonical separator and will be used
+  // when composing pathnames.
+  static const CharType kSeparators[];
+
+  // A special path component meaning "this directory."
+  static const CharType kCurrentDirectory[];
+
+  // A special path component meaning "the parent directory."
+  static const CharType kParentDirectory[];
+
+  // The character used to identify a file extension.
+  static const CharType kExtensionSeparator;
+
+  FilePath() {}
+  FilePath(const FilePath& that) : path_(that.path_) {}
+  explicit FilePath(const StringType& path) : path_(path) {}
+
+#if defined(OS_WIN)
+  explicit FilePath(const wchar_t* path) : path_(path) {}
+#endif
+
+  FilePath& operator=(const FilePath& that) {
+    path_ = that.path_;
+    return *this;
+  }
+
+  bool operator==(const FilePath& that) const { return path_ == that.path_; }
+
+  bool operator!=(const FilePath& that) const { return path_ != that.path_; }
+
+  // Required for some STL containers and operations
+  bool operator<(const FilePath& that) const { return path_ < that.path_; }
+
+  const StringType& value() const { return path_; }
+
+  bool empty() const { return path_.empty(); }
+
+  // Returns true if |character| is in kSeparators.
+  static bool IsSeparator(CharType character);
+
+  // Returns a FilePath corresponding to the directory containing the path
+  // named by this object, stripping away the file component.  If this object
+  // only contains one component, returns a FilePath identifying
+  // kCurrentDirectory.  If this object already refers to the root directory,
+  // returns a FilePath identifying the root directory.
+  FilePath DirName() const;
+
+  // Returns a FilePath corresponding to the last path component of this
+  // object, either a file or a directory.  If this object already refers to
+  // the root directory, returns a FilePath identifying the root directory;
+  // this is the only situation in which BaseName will return an absolute path.
+  FilePath BaseName() const;
+
+  // Returns ".jpg" for path "C:\pics\jojo.jpg", or an empty string if
+  // the file has no extension.  If non-empty, Extension() will always start
+  // with precisely one ".".  The following code should always work regardless
+  // of the value of path.
+  // new_path = path.RemoveExtension().value().append(path.Extension());
+  // ASSERT(new_path == path.value());
+  // NOTE: this is different from the original file_util implementation which
+  // returned the extension without a leading "." ("jpg" instead of ".jpg")
+  StringType Extension() const;
+
+  // Returns "C:\pics\jojo" for path "C:\pics\jojo.jpg"
+  // NOTE: this is slightly different from the similar file_util implementation
+  // which returned simply 'jojo'.
+  FilePath RemoveExtension() const;
+
+  // Inserts |suffix| after the file name portion of |path| but before the
+  // extension.  Returns "" if BaseName() == "." or "..".
+  // Examples:
+  // path == "C:\pics\jojo.jpg" suffix == " (1)", returns "C:\pics\jojo (1).jpg"
+  // path == "jojo.jpg"         suffix == " (1)", returns "jojo (1).jpg"
+  // path == "C:\pics\jojo"     suffix == " (1)", returns "C:\pics\jojo (1)"
+  // path == "C:\pics.old\jojo" suffix == " (1)", returns "C:\pics.old\jojo (1)"
+  FilePath InsertBeforeExtension(const StringType& suffix) const;
+
+  // Replaces the extension of |file_name| with |extension|.  If |file_name|
+  // does not have an extension, them |extension| is added.  If |extension| is
+  // empty, then the extension is removed from |file_name|.
+  // Returns "" if BaseName() == "." or "..".
+  FilePath ReplaceExtension(const StringType& extension) const;
+
+  // Returns a FilePath by appending a separator and the supplied path
+  // component to this object's path.  Append takes care to avoid adding
+  // excessive separators if this object's path already ends with a separator.
+  // If this object's path is kCurrentDirectory, a new FilePath corresponding
+  // only to |component| is returned.  |component| must be a relative path;
+  // it is an error to pass an absolute path.
+  FilePath Append(const StringType& component) const WARN_UNUSED_RESULT;
+  FilePath Append(const FilePath& component) const WARN_UNUSED_RESULT;
+
+  // Although Windows StringType is std::wstring, since the encoding it uses for
+  // paths is well defined, it can handle ASCII path components as well.
+  // Mac uses UTF8, and since ASCII is a subset of that, it works there as well.
+  // On Linux, although it can use any 8-bit encoding for paths, we assume that
+  // ASCII is a valid subset, regardless of the encoding, since many operating
+  // system paths will always be ASCII.
+  FilePath AppendASCII(const std::string& component) const WARN_UNUSED_RESULT;
+
+  // Returns true if this FilePath contains an absolute path.  On Windows, an
+  // absolute path begins with either a drive letter specification followed by
+  // a separator character, or with two separator characters.  On POSIX
+  // platforms, an absolute path begins with a separator character.
+  bool IsAbsolute() const;
+
+  // Returns a copy of this FilePath that does not end with a trailing
+  // separator.
+  FilePath StripTrailingSeparators() const;
+
+  // Calls open on given ifstream instance
+  void OpenInputStream(std::ifstream& stream) const;
+
+  // Older Chromium code assumes that paths are always wstrings.
+  // This function converts a wstring to a FilePath, and is useful to smooth
+  // porting that old code to the FilePath API.
+  // It has "Hack" in its name so people feel bad about using it.
+  // TODO(port): remove these functions.
+  static FilePath FromWStringHack(const std::wstring& wstring);
+
+  // Older Chromium code assumes that paths are always wstrings.
+  // This function produces a wstring from a FilePath, and is useful to smooth
+  // porting that old code to the FilePath API.
+  // It has "Hack" in its name so people feel bad about using it.
+  // TODO(port): remove these functions.
+  std::wstring ToWStringHack() const;
+
+ private:
+  // Remove trailing separators from this object.  If the path is absolute, it
+  // will never be stripped any more than to refer to the absolute root
+  // directory, so "////" will become "/", not "".  A leading pair of
+  // separators is never stripped, to support alternate roots.  This is used to
+  // support UNC paths on Windows.
+  void StripTrailingSeparatorsInternal();
+
+  StringType path_;
+};
+
+// Macros for string literal initialization of FilePath::CharType[].
+#if defined(OS_POSIX)
+#  define FILE_PATH_LITERAL(x) x
+#elif defined(OS_WIN)
+#  define FILE_PATH_LITERAL(x) L##x
+#endif  // OS_WIN
+
+#endif  // BASE_FILE_PATH_H_
diff --git a/ipc/chromium/src/base/histogram.cc b/ipc/chromium/src/base/histogram.cc
new file mode 100644
index 0000000000..ffb9518466
--- /dev/null
+++ b/ipc/chromium/src/base/histogram.cc
@@ -0,0 +1,640 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Histogram is an object that aggregates statistics, and can summarize them in
+// various forms, including ASCII graphical, HTML, and numerically (as a
+// vector of numbers corresponding to each of the aggregating buckets).
+// See header file for details and examples.
+
+#include "base/histogram.h"
+
+#include <math.h>
+
+#include <algorithm>
+#include <string>
+
+#include "base/logging.h"
+#include "base/pickle.h"
+#include "base/string_util.h"
+#include "base/logging.h"
+
+namespace base {
+
+#define CHECK_GT DCHECK_GT
+#define CHECK_LT DCHECK_LT
+
+// Static table of checksums for all possible 8 bit bytes.
+const uint32_t Histogram::kCrcTable[256] = {
+    0x0,         0x77073096L, 0xee0e612cL, 0x990951baL, 0x76dc419L,
+    0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0xedb8832L,  0x79dcb8a4L,
+    0xe0d5e91eL, 0x97d2d988L, 0x9b64c2bL,  0x7eb17cbdL, 0xe7b82d07L,
+    0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
+    0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
+    0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
+    0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
+    0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
+    0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
+    0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
+    0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
+    0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
+    0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
+    0x1db7106L,  0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x6b6b51fL,
+    0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0xf00f934L,  0x9609a88eL,
+    0xe10e9818L, 0x7f6a0dbbL, 0x86d3d2dL,  0x91646c97L, 0xe6635c01L,
+    0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
+    0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
+    0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
+    0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
+    0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
+    0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
+    0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
+    0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
+    0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
+    0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
+    0x3b6e20cL,  0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x4db2615L,
+    0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0xd6d6a3eL,  0x7a6a5aa8L,
+    0xe40ecf0bL, 0x9309ff9dL, 0xa00ae27L,  0x7d079eb1L, 0xf00f9344L,
+    0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
+    0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
+    0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
+    0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
+    0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
+    0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
+    0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
+    0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
+    0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
+    0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
+    0x26d930aL,  0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x5005713L,
+    0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0xcb61b38L,  0x92d28e9bL,
+    0xe5d5be0dL, 0x7cdcefb7L, 0xbdbdf21L,  0x86d3d2d4L, 0xf1d4e242L,
+    0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
+    0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
+    0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
+    0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
+    0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
+    0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
+    0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
+    0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
+    0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
+    0x2d02ef8dL,
+};
+
+typedef Histogram::Count Count;
+
+// static
+const size_t Histogram::kBucketCount_MAX = 16384u;
+
+Histogram* Histogram::FactoryGet(Sample minimum, Sample maximum,
+                                 size_t bucket_count, Flags flags,
+                                 const int* buckets) {
+  DCHECK(buckets);
+  Histogram* histogram(NULL);
+
+  // Defensive code.
+  if (minimum < 1) minimum = 1;
+  if (maximum > kSampleType_MAX - 1) maximum = kSampleType_MAX - 1;
+
+  histogram = new Histogram(minimum, maximum, bucket_count);
+  histogram->InitializeBucketRangeFromData(buckets);
+  histogram->SetFlags(flags);
+
+  DCHECK_EQ(HISTOGRAM, histogram->histogram_type());
+  DCHECK(histogram->HasConstructorArguments(minimum, maximum, bucket_count));
+  return histogram;
+}
+
+void Histogram::Add(int value) {
+  if (value > kSampleType_MAX - 1) value = kSampleType_MAX - 1;
+  if (value < 0) value = 0;
+  size_t index = BucketIndex(value);
+  DCHECK_GE(value, ranges(index));
+  DCHECK_LT(value, ranges(index + 1));
+  Accumulate(value, 1, index);
+}
+
+void Histogram::Subtract(int value) {
+  if (value > kSampleType_MAX - 1) value = kSampleType_MAX - 1;
+  if (value < 0) value = 0;
+  size_t index = BucketIndex(value);
+  DCHECK_GE(value, ranges(index));
+  DCHECK_LT(value, ranges(index + 1));
+  Accumulate(value, -1, index);
+}
+
+void Histogram::AddBoolean(bool value) { DCHECK(false); }
+
+void Histogram::AddSampleSet(const SampleSet& sample) { sample_.Add(sample); }
+
+void Histogram::Clear() { sample_.Clear(); }
+
+void Histogram::SetRangeDescriptions(const DescriptionPair descriptions[]) {
+  DCHECK(false);
+}
+
+//------------------------------------------------------------------------------
+// Methods for the validating a sample and a related histogram.
+//------------------------------------------------------------------------------
+
+Histogram::Inconsistencies Histogram::FindCorruption(
+    const SampleSet& snapshot) const {
+  int inconsistencies = NO_INCONSISTENCIES;
+  Sample previous_range = -1;  // Bottom range is always 0.
+  int64_t count = 0;
+  for (size_t index = 0; index < bucket_count(); ++index) {
+    count += snapshot.counts(index);
+    int new_range = ranges(index);
+    if (previous_range >= new_range) inconsistencies |= BUCKET_ORDER_ERROR;
+    previous_range = new_range;
+  }
+
+  if (!HasValidRangeChecksum()) inconsistencies |= RANGE_CHECKSUM_ERROR;
+
+  int64_t delta64 = snapshot.redundant_count() - count;
+  if (delta64 != 0) {
+    int delta = static_cast<int>(delta64);
+    if (delta != delta64) delta = INT_MAX;  // Flag all giant errors as INT_MAX.
+    // Since snapshots of histograms are taken asynchronously relative to
+    // sampling (and snapped from different threads), it is pretty likely that
+    // we'll catch a redundant count that doesn't match the sample count.  We
+    // allow for a certain amount of slop before flagging this as an
+    // inconsistency.  Even with an inconsistency, we'll snapshot it again (for
+    // UMA in about a half hour, so we'll eventually get the data, if it was
+    // not the result of a corruption.  If histograms show that 1 is "too tight"
+    // then we may try to use 2 or 3 for this slop value.
+    const int kCommonRaceBasedCountMismatch = 1;
+    if (delta > 0) {
+      if (delta > kCommonRaceBasedCountMismatch)
+        inconsistencies |= COUNT_HIGH_ERROR;
+    } else {
+      DCHECK_GT(0, delta);
+      if (-delta > kCommonRaceBasedCountMismatch)
+        inconsistencies |= COUNT_LOW_ERROR;
+    }
+  }
+  return static_cast<Inconsistencies>(inconsistencies);
+}
+
+Histogram::ClassType Histogram::histogram_type() const { return HISTOGRAM; }
+
+Histogram::Sample Histogram::ranges(size_t i) const { return ranges_[i]; }
+
+size_t Histogram::bucket_count() const { return bucket_count_; }
+
+Histogram::SampleSet Histogram::SnapshotSample() const {
+  return sample_.Clone();
+}
+
+bool Histogram::HasConstructorArguments(Sample minimum, Sample maximum,
+                                        size_t bucket_count) {
+  return ((minimum == declared_min_) && (maximum == declared_max_) &&
+          (bucket_count == bucket_count_));
+}
+
+bool Histogram::HasConstructorTimeDeltaArguments(TimeDelta minimum,
+                                                 TimeDelta maximum,
+                                                 size_t bucket_count) {
+  return ((minimum.InMilliseconds() == declared_min_) &&
+          (maximum.InMilliseconds() == declared_max_) &&
+          (bucket_count == bucket_count_));
+}
+
+bool Histogram::HasValidRangeChecksum() const {
+  return CalculateRangeChecksum() == range_checksum_;
+}
+
+size_t Histogram::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) {
+  size_t n = 0;
+  n += aMallocSizeOf(this);
+  n += sample_.SizeOfExcludingThis(aMallocSizeOf);
+  return n;
+}
+
+size_t Histogram::SampleSet::SizeOfExcludingThis(
+    mozilla::MallocSizeOf aMallocSizeOf) {
+  return counts_.ShallowSizeOfExcludingThis(aMallocSizeOf);
+}
+
+Histogram::Histogram(Sample minimum, Sample maximum, size_t bucket_count)
+    : sample_(),
+      declared_min_(minimum),
+      declared_max_(maximum),
+      bucket_count_(bucket_count),
+      flags_(kNoFlags),
+      range_checksum_(0) {
+  Initialize();
+}
+
+Histogram::Histogram(TimeDelta minimum, TimeDelta maximum, size_t bucket_count)
+    : sample_(),
+      declared_min_(static_cast<int>(minimum.InMilliseconds())),
+      declared_max_(static_cast<int>(maximum.InMilliseconds())),
+      bucket_count_(bucket_count),
+      flags_(kNoFlags),
+      range_checksum_(0) {
+  Initialize();
+}
+
+Histogram::~Histogram() {
+  // Just to make sure most derived class did this properly...
+  DCHECK(ValidateBucketRanges());
+}
+
+void Histogram::InitializeBucketRangeFromData(const int* buckets) {
+  ranges_ = buckets;
+  ResetRangeChecksum();
+  DCHECK(ValidateBucketRanges());
+}
+
+bool Histogram::PrintEmptyBucket(size_t index) const { return true; }
+
+size_t Histogram::BucketIndex(Sample value) const {
+  // Use simple binary search.  This is very general, but there are better
+  // approaches if we knew that the buckets were linearly distributed.
+  DCHECK_LE(ranges(0), value);
+  DCHECK_GT(ranges(bucket_count()), value);
+  size_t under = 0;
+  size_t over = bucket_count();
+  size_t mid;
+
+  do {
+    DCHECK_GE(over, under);
+    mid = under + (over - under) / 2;
+    if (mid == under) break;
+    if (ranges(mid) <= value)
+      under = mid;
+    else
+      over = mid;
+  } while (true);
+
+  DCHECK_LE(ranges(mid), value);
+  CHECK_GT(ranges(mid + 1), value);
+  return mid;
+}
+
+// Use the actual bucket widths (like a linear histogram) until the widths get
+// over some transition value, and then use that transition width.  Exponentials
+// get so big so fast (and we don't expect to see a lot of entries in the large
+// buckets), so we need this to make it possible to see what is going on and
+// not have 0-graphical-height buckets.
+double Histogram::GetBucketSize(Count current, size_t i) const {
+  DCHECK_GT(ranges(i + 1), ranges(i));
+  static const double kTransitionWidth = 5;
+  double denominator = ranges(i + 1) - ranges(i);
+  if (denominator > kTransitionWidth)
+    denominator = kTransitionWidth;  // Stop trying to normalize.
+  return current / denominator;
+}
+
+void Histogram::ResetRangeChecksum() {
+  range_checksum_ = CalculateRangeChecksum();
+}
+
+const std::string Histogram::GetAsciiBucketRange(size_t i) const {
+  std::string result;
+  if (kHexRangePrintingFlag & flags_)
+    StringAppendF(&result, "%#x", ranges(i));
+  else
+    StringAppendF(&result, "%d", ranges(i));
+  return result;
+}
+
+// Update histogram data with new sample.
+void Histogram::Accumulate(Sample value, Count count, size_t index) {
+  sample_.Accumulate(value, count, index);
+}
+
+bool Histogram::ValidateBucketRanges() const {
+  // Standard assertions that all bucket ranges should satisfy.
+  DCHECK_EQ(0, ranges_[bucket_count_ + 1]);
+  DCHECK_EQ(0, ranges_[0]);
+  DCHECK_EQ(declared_min(), ranges_[1]);
+  DCHECK_EQ(declared_max(), ranges_[bucket_count_ - 1]);
+  DCHECK_EQ(kSampleType_MAX, ranges_[bucket_count_]);
+  return true;
+}
+
+uint32_t Histogram::CalculateRangeChecksum() const {
+  DCHECK_EQ(0, ranges_[bucket_count_ + 1]);
+  uint32_t checksum =
+      static_cast<uint32_t>(bucket_count_ + 1);  // Seed checksum.
+  for (size_t index = 0; index < bucket_count(); ++index)
+    checksum = Crc32(checksum, ranges(index));
+  return checksum;
+}
+
+void Histogram::Initialize() {
+  sample_.Resize(*this);
+  if (declared_min_ < 1) declared_min_ = 1;
+  if (declared_max_ > kSampleType_MAX - 1) declared_max_ = kSampleType_MAX - 1;
+  DCHECK_LE(declared_min_, declared_max_);
+  DCHECK_GT(bucket_count_, 1u);
+  CHECK_LT(bucket_count_, kBucketCount_MAX);
+  size_t maximal_bucket_count = declared_max_ - declared_min_ + 2;
+  DCHECK_LE(bucket_count_, maximal_bucket_count);
+}
+
+// We generate the CRC-32 using the low order bits to select whether to XOR in
+// the reversed polynomial 0xedb88320L.  This is nice and simple, and allows us
+// to keep the quotient in a uint32_t.  Since we're not concerned about the
+// nature of corruptions (i.e., we don't care about bit sequencing, since we are
+// handling memory changes, which are more grotesque) so we don't bother to
+// get the CRC correct for big-endian vs little-ending calculations.  All we
+// need is a nice hash, that tends to depend on all the bits of the sample, with
+// very little chance of changes in one place impacting changes in another
+// place.
+uint32_t Histogram::Crc32(uint32_t sum, Histogram::Sample range) {
+  const bool kUseRealCrc = true;  // TODO(jar): Switch to false and watch stats.
+  if (kUseRealCrc) {
+    union {
+      Histogram::Sample range;
+      unsigned char bytes[sizeof(Histogram::Sample)];
+    } converter;
+    converter.range = range;
+    for (size_t i = 0; i < sizeof(converter); ++i)
+      sum = kCrcTable[(sum & 0xff) ^ converter.bytes[i]] ^ (sum >> 8);
+  } else {
+    // Use hash techniques provided in ReallyFastHash, except we don't care
+    // about "avalanching" (which would worsten the hash, and add collisions),
+    // and we don't care about edge cases since we have an even number of bytes.
+    union {
+      Histogram::Sample range;
+      uint16_t ints[sizeof(Histogram::Sample) / 2];
+    } converter;
+    DCHECK_EQ(sizeof(Histogram::Sample), sizeof(converter));
+    converter.range = range;
+    sum += converter.ints[0];
+    sum = (sum << 16) ^ sum ^ (static_cast<uint32_t>(converter.ints[1]) << 11);
+    sum += sum >> 11;
+  }
+  return sum;
+}
+
+//------------------------------------------------------------------------------
+// Private methods
+
+double Histogram::GetPeakBucketSize(const SampleSet& snapshot) const {
+  double max = 0;
+  for (size_t i = 0; i < bucket_count(); ++i) {
+    double current_size = GetBucketSize(snapshot.counts(i), i);
+    if (current_size > max) max = current_size;
+  }
+  return max;
+}
+
+//------------------------------------------------------------------------------
+// Methods for the Histogram::SampleSet class
+//------------------------------------------------------------------------------
+
+Histogram::SampleSet::SampleSet() : counts_(), sum_(0), redundant_count_(0) {}
+
+Histogram::SampleSet::~SampleSet() {}
+
+void Histogram::SampleSet::Resize(const Histogram& histogram) {
+  size_t oldSize = counts_.Length();
+  counts_.SetLength(histogram.bucket_count());
+
+  for (size_t i = oldSize; i < histogram.bucket_count(); ++i) counts_[i] = 0;
+}
+
+void Histogram::SampleSet::Accumulate(Sample value, Count count, size_t index) {
+  DCHECK(count == 1 || count == -1);
+  counts_[index] += count;
+  redundant_count_ += count;
+  sum_ += static_cast<int64_t>(count) * value;
+  DCHECK_GE(counts_[index], 0);
+  DCHECK_GE(sum_, 0);
+  DCHECK_GE(redundant_count_, 0);
+}
+
+Count Histogram::SampleSet::TotalCount() const {
+  Count total = 0;
+  for (Counts::const_iterator it = counts_.begin(); it != counts_.end(); ++it) {
+    total += *it;
+  }
+  return total;
+}
+
+void Histogram::SampleSet::Add(const SampleSet& other) {
+  DCHECK_EQ(counts_.Length(), other.counts_.Length());
+  sum_ += other.sum_;
+  redundant_count_ += other.redundant_count_;
+  for (size_t index = 0; index < counts_.Length(); ++index)
+    counts_[index] += other.counts_[index];
+}
+
+//------------------------------------------------------------------------------
+// LinearHistogram: This histogram uses a traditional set of evenly spaced
+// buckets.
+//------------------------------------------------------------------------------
+
+LinearHistogram::~LinearHistogram() {}
+
+Histogram* LinearHistogram::FactoryGet(Sample minimum, Sample maximum,
+                                       size_t bucket_count, Flags flags,
+                                       const int* buckets) {
+  Histogram* histogram(NULL);
+
+  if (minimum < 1) minimum = 1;
+  if (maximum > kSampleType_MAX - 1) maximum = kSampleType_MAX - 1;
+
+  LinearHistogram* linear_histogram =
+      new LinearHistogram(minimum, maximum, bucket_count);
+  linear_histogram->InitializeBucketRangeFromData(buckets);
+  linear_histogram->SetFlags(flags);
+  histogram = linear_histogram;
+
+  DCHECK_EQ(LINEAR_HISTOGRAM, histogram->histogram_type());
+  DCHECK(histogram->HasConstructorArguments(minimum, maximum, bucket_count));
+  return histogram;
+}
+
+Histogram::ClassType LinearHistogram::histogram_type() const {
+  return LINEAR_HISTOGRAM;
+}
+
+void LinearHistogram::Accumulate(Sample value, Count count, size_t index) {
+  sample_.Accumulate(value, count, index);
+}
+
+void LinearHistogram::SetRangeDescriptions(
+    const DescriptionPair descriptions[]) {
+  for (int i = 0; descriptions[i].description; ++i) {
+    bucket_description_[descriptions[i].sample] = descriptions[i].description;
+  }
+}
+
+LinearHistogram::LinearHistogram(Sample minimum, Sample maximum,
+                                 size_t bucket_count)
+    : Histogram(minimum >= 1 ? minimum : 1, maximum, bucket_count) {}
+
+LinearHistogram::LinearHistogram(TimeDelta minimum, TimeDelta maximum,
+                                 size_t bucket_count)
+    : Histogram(minimum >= TimeDelta::FromMilliseconds(1)
+                    ? minimum
+                    : TimeDelta::FromMilliseconds(1),
+                maximum, bucket_count) {}
+
+double LinearHistogram::GetBucketSize(Count current, size_t i) const {
+  DCHECK_GT(ranges(i + 1), ranges(i));
+  // Adjacent buckets with different widths would have "surprisingly" many (few)
+  // samples in a histogram if we didn't normalize this way.
+  double denominator = ranges(i + 1) - ranges(i);
+  return current / denominator;
+}
+
+const std::string LinearHistogram::GetAsciiBucketRange(size_t i) const {
+  int range = ranges(i);
+  BucketDescriptionMap::const_iterator it = bucket_description_.find(range);
+  if (it == bucket_description_.end()) return Histogram::GetAsciiBucketRange(i);
+  return it->second;
+}
+
+bool LinearHistogram::PrintEmptyBucket(size_t index) const {
+  return bucket_description_.find(ranges(index)) == bucket_description_.end();
+}
+
+//------------------------------------------------------------------------------
+// This section provides implementation for BooleanHistogram.
+//------------------------------------------------------------------------------
+
+Histogram* BooleanHistogram::FactoryGet(Flags flags, const int* buckets) {
+  Histogram* histogram(NULL);
+
+  BooleanHistogram* tentative_histogram = new BooleanHistogram();
+  tentative_histogram->InitializeBucketRangeFromData(buckets);
+  tentative_histogram->SetFlags(flags);
+  histogram = tentative_histogram;
+
+  DCHECK_EQ(BOOLEAN_HISTOGRAM, histogram->histogram_type());
+  return histogram;
+}
+
+Histogram::ClassType BooleanHistogram::histogram_type() const {
+  return BOOLEAN_HISTOGRAM;
+}
+
+void BooleanHistogram::AddBoolean(bool value) { Add(value ? 1 : 0); }
+
+BooleanHistogram::BooleanHistogram() : LinearHistogram(1, 2, 3) {}
+
+void BooleanHistogram::Accumulate(Sample value, Count count, size_t index) {
+  // Callers will have computed index based on the non-booleanified value.
+  // So we need to adjust the index manually.
+  LinearHistogram::Accumulate(!!value, count, value ? 1 : 0);
+}
+
+//------------------------------------------------------------------------------
+// FlagHistogram:
+//------------------------------------------------------------------------------
+
+Histogram* FlagHistogram::FactoryGet(Flags flags, const int* buckets) {
+  Histogram* h(nullptr);
+
+  FlagHistogram* fh = new FlagHistogram();
+  fh->InitializeBucketRangeFromData(buckets);
+  fh->SetFlags(flags);
+  size_t zero_index = fh->BucketIndex(0);
+  fh->LinearHistogram::Accumulate(0, 1, zero_index);
+  h = fh;
+
+  return h;
+}
+
+FlagHistogram::FlagHistogram() : BooleanHistogram(), mSwitched(false) {}
+
+Histogram::ClassType FlagHistogram::histogram_type() const {
+  return FLAG_HISTOGRAM;
+}
+
+void FlagHistogram::Accumulate(Sample value, Count count, size_t index) {
+  if (mSwitched) {
+    return;
+  }
+
+  mSwitched = true;
+  DCHECK_EQ(value, 1);
+  LinearHistogram::Accumulate(value, 1, index);
+  size_t zero_index = BucketIndex(0);
+  LinearHistogram::Accumulate(0, -1, zero_index);
+}
+
+void FlagHistogram::AddSampleSet(const SampleSet& sample) {
+  DCHECK_EQ(bucket_count(), sample.size());
+  // We can't be sure the SampleSet provided came from another FlagHistogram,
+  // so we take the following steps:
+  //  - If our flag has already been set do nothing.
+  //  - Set our flag if the following hold:
+  //      - The sum of the counts in the provided SampleSet is 1.
+  //      - The bucket index for that single value is the same as the index
+  //      where we
+  //        would place our set flag.
+  //  - Otherwise, take no action.
+
+  if (mSwitched) {
+    return;
+  }
+
+  if (sample.sum() != 1) {
+    return;
+  }
+
+  size_t one_index = BucketIndex(1);
+  if (sample.counts(one_index) == 1) {
+    Accumulate(1, 1, one_index);
+  }
+}
+
+void FlagHistogram::Clear() {
+  Histogram::Clear();
+
+  mSwitched = false;
+  size_t zero_index = BucketIndex(0);
+  LinearHistogram::Accumulate(0, 1, zero_index);
+}
+
+//------------------------------------------------------------------------------
+// CountHistogram:
+//------------------------------------------------------------------------------
+
+Histogram* CountHistogram::FactoryGet(Flags flags, const int* buckets) {
+  Histogram* h(nullptr);
+
+  CountHistogram* fh = new CountHistogram();
+  fh->InitializeBucketRangeFromData(buckets);
+  fh->SetFlags(flags);
+  h = fh;
+
+  return h;
+}
+
+CountHistogram::CountHistogram() : LinearHistogram(1, 2, 3) {}
+
+Histogram::ClassType CountHistogram::histogram_type() const {
+  return COUNT_HISTOGRAM;
+}
+
+void CountHistogram::Accumulate(Sample value, Count count, size_t index) {
+  size_t zero_index = BucketIndex(0);
+  LinearHistogram::Accumulate(value, 1, zero_index);
+}
+
+void CountHistogram::AddSampleSet(const SampleSet& sample) {
+  DCHECK_EQ(bucket_count(), sample.size());
+  // We can't be sure the SampleSet provided came from another CountHistogram,
+  // so we at least check that the unused buckets are empty.
+
+  const size_t indices[] = {BucketIndex(0), BucketIndex(1), BucketIndex(2)};
+
+  if (sample.counts(indices[1]) != 0 || sample.counts(indices[2]) != 0) {
+    return;
+  }
+
+  if (sample.counts(indices[0]) != 0) {
+    Histogram::AddSampleSet(sample);
+  }
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/histogram.h b/ipc/chromium/src/base/histogram.h
new file mode 100644
index 0000000000..f9ea21c8df
--- /dev/null
+++ b/ipc/chromium/src/base/histogram.h
@@ -0,0 +1,432 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Histogram is an object that aggregates statistics, and can summarize them in
+// various forms, including ASCII graphical, HTML, and numerically (as a
+// vector of numbers corresponding to each of the aggregating buckets).
+
+// It supports calls to accumulate either time intervals (which are processed
+// as integral number of milliseconds), or arbitrary integral units.
+
+// The default layout of buckets is exponential.  For example, buckets might
+// contain (sequentially) the count of values in the following intervals:
+// [0,1), [1,2), [2,4), [4,8), [8,16), [16,32), [32,64), [64,infinity)
+// That bucket allocation would actually result from construction of a histogram
+// for values between 1 and 64, with 8 buckets, such as:
+// Histogram count(L"some name", 1, 64, 8);
+// Note that the underflow bucket [0,1) and the overflow bucket [64,infinity)
+// are not counted by the constructor in the user supplied "bucket_count"
+// argument.
+// The above example has an exponential ratio of 2 (doubling the bucket width
+// in each consecutive bucket.  The Histogram class automatically calculates
+// the smallest ratio that it can use to construct the number of buckets
+// selected in the constructor.  An another example, if you had 50 buckets,
+// and millisecond time values from 1 to 10000, then the ratio between
+// consecutive bucket widths will be approximately somewhere around the 50th
+// root of 10000.  This approach provides very fine grain (narrow) buckets
+// at the low end of the histogram scale, but allows the histogram to cover a
+// gigantic range with the addition of very few buckets.
+
+// Histograms use a pattern involving a function static variable, that is a
+// pointer to a histogram.  This static is explicitly initialized on any thread
+// that detects a uninitialized (NULL) pointer.  The potentially racy
+// initialization is not a problem as it is always set to point to the same
+// value (i.e., the FactoryGet always returns the same value).  FactoryGet
+// is also completely thread safe, which results in a completely thread safe,
+// and relatively fast, set of counters.  To avoid races at shutdown, the static
+// pointer is NOT deleted, and we leak the histograms at process termination.
+
+#ifndef BASE_METRICS_HISTOGRAM_H_
+#define BASE_METRICS_HISTOGRAM_H_
+#pragma once
+
+#include "mozilla/Atomics.h"
+#include "mozilla/MemoryReporting.h"
+
+#include <map>
+#include <string>
+
+#include "base/time.h"
+
+#include "nsTArray.h"
+
+namespace base {
+
+//------------------------------------------------------------------------------
+
+class BooleanHistogram;
+class CustomHistogram;
+class Histogram;
+class LinearHistogram;
+
+class Histogram {
+ public:
+  typedef int Sample;  // Used for samples (and ranges of samples).
+  typedef int Count;   // Used to count samples in a bucket.
+  static const Sample kSampleType_MAX = INT_MAX;
+  // Initialize maximum number of buckets in histograms as 16,384.
+  static const size_t kBucketCount_MAX;
+
+  typedef nsTArray<Count> Counts;
+  typedef const Sample* Ranges;
+
+  // These enums are used to facilitate deserialization of renderer histograms
+  // into the browser.
+  enum ClassType {
+    HISTOGRAM,
+    LINEAR_HISTOGRAM,
+    BOOLEAN_HISTOGRAM,
+    FLAG_HISTOGRAM,
+    COUNT_HISTOGRAM,
+    CUSTOM_HISTOGRAM,
+    NOT_VALID_IN_RENDERER
+  };
+
+  enum BucketLayout { EXPONENTIAL, LINEAR, CUSTOM };
+
+  enum Flags {
+    kNoFlags = 0,
+    kUmaTargetedHistogramFlag = 0x1,  // Histogram should be UMA uploaded.
+
+    kHexRangePrintingFlag = 0x8000  // Fancy bucket-naming supported.
+  };
+
+  enum Inconsistencies {
+    NO_INCONSISTENCIES = 0x0,
+    RANGE_CHECKSUM_ERROR = 0x1,
+    BUCKET_ORDER_ERROR = 0x2,
+    COUNT_HIGH_ERROR = 0x4,
+    COUNT_LOW_ERROR = 0x8,
+
+    NEVER_EXCEEDED_VALUE = 0x10
+  };
+
+  struct DescriptionPair {
+    Sample sample;
+    const char* description;  // Null means end of a list of pairs.
+  };
+
+  size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);
+
+  bool is_empty() const {
+    return this->sample_.counts(0) == 0 && this->sample_.sum() == 0;
+  }
+
+  //----------------------------------------------------------------------------
+  // Statistic values, developed over the life of the histogram.
+
+  class SampleSet {
+   public:
+    explicit SampleSet();
+    ~SampleSet();
+    SampleSet(SampleSet&&) = default;
+
+    // None of the methods in this class are thread-safe.  Callers
+    // must deal with locking themselves.
+
+    // Adjust size of counts_ for use with given histogram.
+    void Resize(const Histogram& histogram);
+
+    // Accessor for histogram to make routine additions.
+    void Accumulate(Sample value, Count count, size_t index);
+
+    // Arithmetic manipulation of corresponding elements of the set.
+    void Add(const SampleSet& other);
+
+    size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf);
+
+    Count counts(size_t i) const { return counts_[i]; }
+    Count TotalCount() const;
+    int64_t sum() const { return sum_; }
+    int64_t redundant_count() const { return redundant_count_; }
+    size_t size() const { return counts_.Length(); }
+    SampleSet Clone() const {
+      SampleSet result;
+      result.counts_ = counts_.Clone();
+      result.sum_ = sum_;
+      result.redundant_count_ = redundant_count_;
+      return result;
+    }
+    void Clear() {
+      sum_ = 0;
+      redundant_count_ = 0;
+      for (int& i : counts_) {
+        i = 0;
+      }
+    }
+
+   protected:
+    // Actual histogram data is stored in buckets, showing the count of values
+    // that fit into each bucket.
+    Counts counts_;
+
+    // Save simple stats locally.  Note that this MIGHT get done in base class
+    // without shared memory at some point.
+    int64_t sum_;  // sum of samples.
+
+    // To help identify memory corruption, we reduntantly save the number of
+    // samples we've accumulated into all of our buckets.  We can compare this
+    // count to the sum of the counts in all buckets, and detect problems.  Note
+    // that due to races in histogram accumulation (if a histogram is indeed
+    // updated on several threads simultaneously), the tallies might mismatch,
+    // and also the snapshotting code may asynchronously get a mismatch (though
+    // generally either race based mismatch cause is VERY rare).
+    int64_t redundant_count_;
+  };
+
+  //----------------------------------------------------------------------------
+  // minimum should start from 1. 0 is invalid as a minimum. 0 is an implicit
+  // default underflow bucket.
+  static Histogram* FactoryGet(Sample minimum, Sample maximum,
+                               size_t bucket_count, Flags flags,
+                               const int* buckets);
+
+  virtual ~Histogram();
+
+  void Add(int value);
+  void Subtract(int value);
+
+  // This method is an interface, used only by BooleanHistogram.
+  virtual void AddBoolean(bool value);
+
+  // Accept a TimeDelta to increment.
+  void AddTime(TimeDelta time) { Add(static_cast<int>(time.InMilliseconds())); }
+
+  virtual void AddSampleSet(const SampleSet& sample);
+
+  virtual void Clear();
+
+  // This method is an interface, used only by LinearHistogram.
+  virtual void SetRangeDescriptions(const DescriptionPair descriptions[]);
+
+  // Support generic flagging of Histograms.
+  // 0x1 Currently used to mark this histogram to be recorded by UMA..
+  // 0x8000 means print ranges in hex.
+  void SetFlags(Flags flags) { flags_ = static_cast<Flags>(flags_ | flags); }
+  void ClearFlags(Flags flags) { flags_ = static_cast<Flags>(flags_ & ~flags); }
+  int flags() const { return flags_; }
+
+  // Check to see if bucket ranges, counts and tallies in the snapshot are
+  // consistent with the bucket ranges and checksums in our histogram.  This can
+  // produce a false-alarm if a race occurred in the reading of the data during
+  // a SnapShot process, but should otherwise be false at all times (unless we
+  // have memory over-writes, or DRAM failures).
+  virtual Inconsistencies FindCorruption(const SampleSet& snapshot) const;
+
+  //----------------------------------------------------------------------------
+  // Accessors for factory constuction, serialization and testing.
+  //----------------------------------------------------------------------------
+  virtual ClassType histogram_type() const;
+  Sample declared_min() const { return declared_min_; }
+  Sample declared_max() const { return declared_max_; }
+  virtual Sample ranges(size_t i) const;
+  uint32_t range_checksum() const { return range_checksum_; }
+  virtual size_t bucket_count() const;
+
+  virtual SampleSet SnapshotSample() const;
+
+  virtual bool HasConstructorArguments(Sample minimum, Sample maximum,
+                                       size_t bucket_count);
+
+  virtual bool HasConstructorTimeDeltaArguments(TimeDelta minimum,
+                                                TimeDelta maximum,
+                                                size_t bucket_count);
+  // Return true iff the range_checksum_ matches current ranges_ vector.
+  bool HasValidRangeChecksum() const;
+
+ protected:
+  Histogram(Sample minimum, Sample maximum, size_t bucket_count);
+  Histogram(TimeDelta minimum, TimeDelta maximum, size_t bucket_count);
+
+  // Initialize ranges_ mapping from raw data.
+  void InitializeBucketRangeFromData(const int* buckets);
+
+  // Method to override to skip the display of the i'th bucket if it's empty.
+  virtual bool PrintEmptyBucket(size_t index) const;
+
+  //----------------------------------------------------------------------------
+  // Methods to override to create histogram with different bucket widths.
+  //----------------------------------------------------------------------------
+  // Find bucket to increment for sample value.
+  virtual size_t BucketIndex(Sample value) const;
+  // Get normalized size, relative to the ranges_[i].
+  virtual double GetBucketSize(Count current, size_t i) const;
+
+  // Recalculate range_checksum_.
+  void ResetRangeChecksum();
+
+  // Return a string description of what goes in a given bucket.
+  // Most commonly this is the numeric value, but in derived classes it may
+  // be a name (or string description) given to the bucket.
+  virtual const std::string GetAsciiBucketRange(size_t it) const;
+
+  //----------------------------------------------------------------------------
+  // Methods to override to create thread safe histogram.
+  //----------------------------------------------------------------------------
+  // Update all our internal data, including histogram
+  virtual void Accumulate(Sample value, Count count, size_t index);
+
+  // Validate that ranges_ was created sensibly (top and bottom range
+  // values relate properly to the declared_min_ and declared_max_)..
+  bool ValidateBucketRanges() const;
+
+  virtual uint32_t CalculateRangeChecksum() const;
+
+  // Finally, provide the state that changes with the addition of each new
+  // sample.
+  SampleSet sample_;
+
+ private:
+  // Post constructor initialization.
+  void Initialize();
+
+  // Checksum function for accumulating range values into a checksum.
+  static uint32_t Crc32(uint32_t sum, Sample range);
+
+  //----------------------------------------------------------------------------
+  // Helpers for emitting Ascii graphic.  Each method appends data to output.
+
+  // Find out how large the (graphically) the largest bucket will appear to be.
+  double GetPeakBucketSize(const SampleSet& snapshot) const;
+
+  //----------------------------------------------------------------------------
+  // Table for generating Crc32 values.
+  static const uint32_t kCrcTable[256];
+  //----------------------------------------------------------------------------
+  // Invariant values set at/near construction time
+
+  Sample declared_min_;  // Less than this goes into counts_[0]
+  Sample declared_max_;  // Over this goes into counts_[bucket_count_ - 1].
+  size_t bucket_count_;  // Dimension of counts_[].
+
+  // Flag the histogram for recording by UMA via metric_services.h.
+  Flags flags_;
+
+  // For each index, show the least value that can be stored in the
+  // corresponding bucket. We also append one extra element in this array,
+  // containing kSampleType_MAX, to make calculations easy.
+  // The dimension of ranges_ is bucket_count + 1.
+  Ranges ranges_;
+
+  // For redundancy, we store a checksum of all the sample ranges when ranges
+  // are generated.  If ever there is ever a difference, then the histogram must
+  // have been corrupted.
+  uint32_t range_checksum_;
+
+  DISALLOW_COPY_AND_ASSIGN(Histogram);
+};
+
+//------------------------------------------------------------------------------
+
+// LinearHistogram is a more traditional histogram, with evenly spaced
+// buckets.
+class LinearHistogram : public Histogram {
+ public:
+  virtual ~LinearHistogram();
+
+  /* minimum should start from 1. 0 is as minimum is invalid. 0 is an implicit
+     default underflow bucket. */
+  static Histogram* FactoryGet(Sample minimum, Sample maximum,
+                               size_t bucket_count, Flags flags,
+                               const int* buckets);
+
+  // Overridden from Histogram:
+  virtual ClassType histogram_type() const override;
+
+  virtual void Accumulate(Sample value, Count count, size_t index) override;
+
+  // Store a list of number/text values for use in rendering the histogram.
+  // The last element in the array has a null in its "description" slot.
+  virtual void SetRangeDescriptions(
+      const DescriptionPair descriptions[]) override;
+
+ protected:
+  LinearHistogram(Sample minimum, Sample maximum, size_t bucket_count);
+
+  LinearHistogram(TimeDelta minimum, TimeDelta maximum, size_t bucket_count);
+
+  virtual double GetBucketSize(Count current, size_t i) const override;
+
+  // If we have a description for a bucket, then return that.  Otherwise
+  // let parent class provide a (numeric) description.
+  virtual const std::string GetAsciiBucketRange(size_t i) const override;
+
+  // Skip printing of name for numeric range if we have a name (and if this is
+  // an empty bucket).
+  virtual bool PrintEmptyBucket(size_t index) const override;
+
+ private:
+  // For some ranges, we store a printable description of a bucket range.
+  // If there is no desciption, then GetAsciiBucketRange() uses parent class
+  // to provide a description.
+  typedef std::map<Sample, std::string> BucketDescriptionMap;
+  BucketDescriptionMap bucket_description_;
+
+  DISALLOW_COPY_AND_ASSIGN(LinearHistogram);
+};
+
+//------------------------------------------------------------------------------
+
+// BooleanHistogram is a histogram for booleans.
+class BooleanHistogram : public LinearHistogram {
+ public:
+  static Histogram* FactoryGet(Flags flags, const int* buckets);
+
+  virtual ClassType histogram_type() const override;
+
+  virtual void AddBoolean(bool value) override;
+
+  virtual void Accumulate(Sample value, Count count, size_t index) override;
+
+ protected:
+  explicit BooleanHistogram();
+
+  DISALLOW_COPY_AND_ASSIGN(BooleanHistogram);
+};
+
+//------------------------------------------------------------------------------
+
+// FlagHistogram is like boolean histogram, but only allows a single off/on
+// value.
+class FlagHistogram : public BooleanHistogram {
+ public:
+  static Histogram* FactoryGet(Flags flags, const int* buckets);
+
+  virtual ClassType histogram_type() const override;
+
+  virtual void Accumulate(Sample value, Count count, size_t index) override;
+
+  virtual void AddSampleSet(const SampleSet& sample) override;
+
+  virtual void Clear() override;
+
+ private:
+  explicit FlagHistogram();
+  bool mSwitched;
+
+  DISALLOW_COPY_AND_ASSIGN(FlagHistogram);
+};
+
+// CountHistogram only allows a single monotic counter value.
+class CountHistogram : public LinearHistogram {
+ public:
+  static Histogram* FactoryGet(Flags flags, const int* buckets);
+
+  virtual ClassType histogram_type() const override;
+
+  virtual void Accumulate(Sample value, Count count, size_t index) override;
+
+  virtual void AddSampleSet(const SampleSet& sample) override;
+
+ private:
+  explicit CountHistogram();
+
+  DISALLOW_COPY_AND_ASSIGN(CountHistogram);
+};
+
+}  // namespace base
+
+#endif  // BASE_METRICS_HISTOGRAM_H_
diff --git a/ipc/chromium/src/base/linked_ptr.h b/ipc/chromium/src/base/linked_ptr.h
new file mode 100644
index 0000000000..7b428312b8
--- /dev/null
+++ b/ipc/chromium/src/base/linked_ptr.h
@@ -0,0 +1,185 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// A "smart" pointer type with reference tracking.  Every pointer to a
+// particular object is kept on a circular linked list.  When the last pointer
+// to an object is destroyed or reassigned, the object is deleted.
+//
+// Used properly, this deletes the object when the last reference goes away.
+// There are several caveats:
+// - Like all reference counting schemes, cycles lead to leaks.
+// - Each smart pointer is actually two pointers (8 bytes instead of 4).
+// - Every time a pointer is released, the entire list of pointers to that
+//   object is traversed.  This class is therefore NOT SUITABLE when there
+//   will often be more than two or three pointers to a particular object.
+// - References are only tracked as long as linked_ptr<> objects are copied.
+//   If a linked_ptr<> is converted to a raw pointer and back, BAD THINGS
+//   will happen (double deletion).
+//
+// A good use of this class is storing object references in STL containers.
+// You can safely put linked_ptr<> in a vector<>.
+// Other uses may not be as good.
+//
+// Note: If you use an incomplete type with linked_ptr<>, the class
+// *containing* linked_ptr<> must have a constructor and destructor (even
+// if they do nothing!).
+//
+// Thread Safety:
+//   A linked_ptr is NOT thread safe. Copying a linked_ptr object is
+//   effectively a read-write operation.
+//
+// Alternative: to linked_ptr is shared_ptr, which
+//  - is also two pointers in size (8 bytes for 32 bit addresses)
+//  - is thread safe for copying and deletion
+//  - supports weak_ptrs
+
+#ifndef BASE_LINKED_PTR_H_
+#define BASE_LINKED_PTR_H_
+
+#include "base/logging.h"  // for CHECK macros
+
+// This is used internally by all instances of linked_ptr<>.  It needs to be
+// a non-template class because different types of linked_ptr<> can refer to
+// the same object (linked_ptr<Superclass>(obj) vs linked_ptr<Subclass>(obj)).
+// So, it needs to be possible for different types of linked_ptr to participate
+// in the same circular linked list, so we need a single class type here.
+//
+// DO NOT USE THIS CLASS DIRECTLY YOURSELF.  Use linked_ptr<T>.
+class linked_ptr_internal {
+ public:
+  // Create a new circle that includes only this instance.
+  void join_new() { next_ = this; }
+
+  // Join an existing circle.
+  void join(linked_ptr_internal const* ptr) {
+    next_ = ptr->next_;
+    ptr->next_ = this;
+  }
+
+  // Leave whatever circle we're part of.  Returns true iff we were the
+  // last member of the circle.  Once this is done, you can join() another.
+  bool depart() {
+    if (next_ == this) return true;
+    linked_ptr_internal const* p = next_;
+    while (p->next_ != this) p = p->next_;
+    p->next_ = next_;
+    return false;
+  }
+
+ private:
+  mutable linked_ptr_internal const* next_;
+};
+
+template <typename T>
+class linked_ptr {
+ public:
+  typedef T element_type;
+
+  // Take over ownership of a raw pointer.  This should happen as soon as
+  // possible after the object is created.
+  explicit linked_ptr(T* ptr = NULL) { capture(ptr); }
+  ~linked_ptr() { depart(); }
+
+  // Copy an existing linked_ptr<>, adding ourselves to the list of references.
+  template <typename U>
+  linked_ptr(linked_ptr<U> const& ptr) {
+    copy(&ptr);
+  }
+  linked_ptr(linked_ptr const& ptr) {
+    DCHECK_NE(&ptr, this);
+    copy(&ptr);
+  }
+
+  // Assignment releases the old value and acquires the new.
+  template <typename U>
+  linked_ptr& operator=(linked_ptr<U> const& ptr) {
+    depart();
+    copy(&ptr);
+    return *this;
+  }
+
+  linked_ptr& operator=(linked_ptr const& ptr) {
+    if (&ptr != this) {
+      depart();
+      copy(&ptr);
+    }
+    return *this;
+  }
+
+  // Smart pointer members.
+  void reset(T* ptr = NULL) {
+    depart();
+    capture(ptr);
+  }
+  T* get() const { return value_; }
+  T* operator->() const { return value_; }
+  T& operator*() const { return *value_; }
+  // Release ownership of the pointed object and returns it.
+  // Sole ownership by this linked_ptr object is required.
+  T* release() {
+    bool last = link_.depart();
+    CHECK(last);
+    T* v = value_;
+    value_ = NULL;
+    return v;
+  }
+
+  bool operator==(const T* p) const { return value_ == p; }
+  bool operator!=(const T* p) const { return value_ != p; }
+  template <typename U>
+  bool operator==(linked_ptr<U> const& ptr) const {
+    return value_ == ptr.get();
+  }
+  template <typename U>
+  bool operator!=(linked_ptr<U> const& ptr) const {
+    return value_ != ptr.get();
+  }
+
+ private:
+  template <typename U>
+  friend class linked_ptr;
+
+  T* value_;
+  linked_ptr_internal link_;
+
+  void depart() {
+    if (link_.depart()) delete value_;
+  }
+
+  void capture(T* ptr) {
+    value_ = ptr;
+    link_.join_new();
+  }
+
+  template <typename U>
+  void copy(linked_ptr<U> const* ptr) {
+    value_ = ptr->get();
+    if (value_)
+      link_.join(&ptr->link_);
+    else
+      link_.join_new();
+  }
+};
+
+template <typename T>
+inline bool operator==(T* ptr, const linked_ptr<T>& x) {
+  return ptr == x.get();
+}
+
+template <typename T>
+inline bool operator!=(T* ptr, const linked_ptr<T>& x) {
+  return ptr != x.get();
+}
+
+// A function to convert T* into linked_ptr<T>
+// Doing e.g. make_linked_ptr(new FooBarBaz<type>(arg)) is a shorter notation
+// for linked_ptr<FooBarBaz<type> >(new FooBarBaz<type>(arg))
+template <typename T>
+linked_ptr<T> make_linked_ptr(T* ptr) {
+  return linked_ptr<T>(ptr);
+}
+
+#endif  // BASE_LINKED_PTR_H_
diff --git a/ipc/chromium/src/base/linux_memfd_defs.h b/ipc/chromium/src/base/linux_memfd_defs.h
new file mode 100644
index 0000000000..f5b0de1de8
--- /dev/null
+++ b/ipc/chromium/src/base/linux_memfd_defs.h
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+#ifndef BASE_LINUX_MEMFD_DEFS_H
+#define BASE_LINUX_MEMFD_DEFS_H
+
+#include <sys/syscall.h>
+
+// glibc before 2.27 didn't have a memfd_create wrapper, and if the
+// build system is old enough then it won't have the syscall number
+// and various related constants either.
+
+#if defined(__x86_64__)
+#  define MEMFD_CREATE_NR 319
+#elif defined(__i386__)
+#  define MEMFD_CREATE_NR 356
+#elif defined(__aarch64__)
+#  define MEMFD_CREATE_NR 279
+#elif defined(__arm__)
+#  define MEMFD_CREATE_NR 385
+#elif defined(__powerpc__)
+#  define MEMFD_CREATE_NR 360
+#elif defined(__s390__)
+#  define MEMFD_CREATE_NR 350
+#elif defined(__mips__)
+#  include <sgidefs.h>
+#  if _MIPS_SIM == _MIPS_SIM_ABI32
+#    define MEMFD_CREATE_NR 4354
+#  elif _MIPS_SIM == _MIPS_SIM_ABI64
+#    define MEMFD_CREATE_NR 5314
+#  elif _MIPS_SIM == _MIPS_SIM_NABI32
+#    define MEMFD_CREATE_NR 6318
+#  endif  // mips subarch
+#endif    // arch
+
+#ifdef MEMFD_CREATE_NR
+#  ifdef SYS_memfd_create
+static_assert(MEMFD_CREATE_NR == SYS_memfd_create,
+              "MEMFD_CREATE_NR should match the actual SYS_memfd_create value");
+#  else  // defined here but not in system headers
+#    define SYS_memfd_create MEMFD_CREATE_NR
+#  endif
+#endif
+
+#ifndef MFD_CLOEXEC
+#  define MFD_CLOEXEC 0x0001U
+#  define MFD_ALLOW_SEALING 0x0002U
+#endif
+
+#ifndef F_ADD_SEALS
+#  ifndef F_LINUX_SPECIFIC_BASE
+#    define F_LINUX_SPECIFIC_BASE 1024
+#  endif
+#  define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
+#  define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
+#  define F_SEAL_SEAL 0x0001   /* prevent further seals from being set */
+#  define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
+#  define F_SEAL_GROW 0x0004   /* prevent file from growing */
+#  define F_SEAL_WRITE 0x0008  /* prevent writes */
+#endif
+
+#ifndef F_SEAL_FUTURE_WRITE
+#  define F_SEAL_FUTURE_WRITE 0x0010
+#endif
+
+#endif  // BASE_LINUX_MEMFD_DEFS_H
diff --git a/ipc/chromium/src/base/lock.h b/ipc/chromium/src/base/lock.h
new file mode 100644
index 0000000000..17fe0dad6a
--- /dev/null
+++ b/ipc/chromium/src/base/lock.h
@@ -0,0 +1,102 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_LOCK_H_
+#define BASE_LOCK_H_
+
+#include "base/basictypes.h"
+#include "base/lock_impl.h"
+#include "base/platform_thread.h"
+#include "build/build_config.h"
+
+// A convenient wrapper for an OS specific critical section.
+class Lock {
+ public:
+  // Optimized wrapper implementation
+  Lock() : lock_() {}
+  ~Lock() {}
+  void Acquire() { lock_.Lock(); }
+  void Release() { lock_.Unlock(); }
+
+  // If the lock is not held, take it and return true. If the lock is already
+  // held by another thread, immediately return false. This must not be called
+  // by a thread already holding the lock (what happens is undefined and an
+  // assertion may fail).
+  bool Try() { return lock_.Try(); }
+
+  // Null implementation if not debug.
+  void AssertAcquired() const {}
+
+  // Whether Lock mitigates priority inversion when used from different thread
+  // priorities.
+  static bool HandlesMultipleThreadPriorities() {
+#if defined(OS_POSIX)
+    // POSIX mitigates priority inversion by setting the priority of a thread
+    // holding a Lock to the maximum priority of any other thread waiting on it.
+    return base::internal::LockImpl::PriorityInheritanceAvailable();
+#elif defined(OS_WIN)
+    // Windows mitigates priority inversion by randomly boosting the priority of
+    // ready threads.
+    // https://msdn.microsoft.com/library/windows/desktop/ms684831.aspx
+    return true;
+#else
+#  error Unsupported platform
+#endif
+  }
+
+#if defined(OS_POSIX) || defined(OS_WIN)
+  // Both Windows and POSIX implementations of ConditionVariable need to be
+  // able to see our lock and tweak our debugging counters, as they release and
+  // acquire locks inside of their condition variable APIs.
+  friend class ConditionVariable;
+#endif
+
+ private:
+  // Platform specific underlying lock implementation.
+  ::base::internal::LockImpl lock_;
+
+  DISALLOW_COPY_AND_ASSIGN(Lock);
+};
+
+// A helper class that acquires the given Lock while the AutoLock is in scope.
+class AutoLock {
+ public:
+  struct AlreadyAcquired {};
+
+  explicit AutoLock(Lock& lock) : lock_(lock) { lock_.Acquire(); }
+
+  AutoLock(Lock& lock, const AlreadyAcquired&) : lock_(lock) {
+    lock_.AssertAcquired();
+  }
+
+  ~AutoLock() {
+    lock_.AssertAcquired();
+    lock_.Release();
+  }
+
+ private:
+  Lock& lock_;
+  DISALLOW_COPY_AND_ASSIGN(AutoLock);
+};
+
+// AutoUnlock is a helper that will Release() the |lock| argument in the
+// constructor, and re-Acquire() it in the destructor.
+class AutoUnlock {
+ public:
+  explicit AutoUnlock(Lock& lock) : lock_(lock) {
+    // We require our caller to have the lock.
+    lock_.AssertAcquired();
+    lock_.Release();
+  }
+
+  ~AutoUnlock() { lock_.Acquire(); }
+
+ private:
+  Lock& lock_;
+  DISALLOW_COPY_AND_ASSIGN(AutoUnlock);
+};
+
+#endif  // BASE_LOCK_H_
diff --git a/ipc/chromium/src/base/lock_impl.h b/ipc/chromium/src/base/lock_impl.h
new file mode 100644
index 0000000000..30df64c9b0
--- /dev/null
+++ b/ipc/chromium/src/base/lock_impl.h
@@ -0,0 +1,66 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_LOCK_IMPL_H_
+#define BASE_LOCK_IMPL_H_
+
+#include "base/basictypes.h"
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+#  include <windows.h>
+#elif defined(OS_POSIX)
+#  include <pthread.h>
+#endif
+
+namespace base {
+namespace internal {
+
+// This class implements the underlying platform-specific spin-lock mechanism
+// used for the Lock class.  Most users should not use LockImpl directly, but
+// should instead use Lock.
+class LockImpl {
+ public:
+#if defined(OS_WIN)
+  using NativeHandle = SRWLOCK;
+#elif defined(OS_POSIX)
+  using NativeHandle = pthread_mutex_t;
+#endif
+
+  LockImpl();
+  ~LockImpl();
+
+  // If the lock is not held, take it and return true.  If the lock is already
+  // held by something else, immediately return false.
+  bool Try();
+
+  // Take the lock, blocking until it is available if necessary.
+  void Lock();
+
+  // Release the lock.  This must only be called by the lock's holder: after
+  // a successful call to Try, or a call to Lock.
+  void Unlock();
+
+  // Return the native underlying lock.
+  // TODO(awalker): refactor lock and condition variables so that this is
+  // unnecessary.
+  NativeHandle* native_handle() { return &native_handle_; }
+
+#if defined(OS_POSIX)
+  // Whether this lock will attempt to use priority inheritance.
+  static bool PriorityInheritanceAvailable();
+#endif
+
+ private:
+  NativeHandle native_handle_;
+
+  DISALLOW_COPY_AND_ASSIGN(LockImpl);
+};
+
+}  // namespace internal
+}  // namespace base
+
+#endif  // BASE_LOCK_IMPL_H_
diff --git a/ipc/chromium/src/base/lock_impl_posix.cc b/ipc/chromium/src/base/lock_impl_posix.cc
new file mode 100644
index 0000000000..ce4876d16b
--- /dev/null
+++ b/ipc/chromium/src/base/lock_impl_posix.cc
@@ -0,0 +1,98 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/lock_impl.h"
+
+#include <errno.h>
+#include <string.h>
+
+#include "base/logging.h"
+#include "base/lock.h"
+
+namespace base {
+namespace internal {
+
+// Determines which platforms can consider using priority inheritance locks. Use
+// this define for platform code that may not compile if priority inheritance
+// locks aren't available. For this platform code,
+// PRIORITY_INHERITANCE_LOCKS_POSSIBLE() is a necessary but insufficient check.
+// Lock::PriorityInheritanceAvailable still must be checked as the code may
+// compile but the underlying platform still may not correctly support priority
+// inheritance locks.
+#if defined(OS_NACL) || defined(OS_ANDROID)
+#  define PRIORITY_INHERITANCE_LOCKS_POSSIBLE() 0
+#else
+#  define PRIORITY_INHERITANCE_LOCKS_POSSIBLE() 1
+#endif
+
+LockImpl::LockImpl() {
+  pthread_mutexattr_t mta;
+  int rv = pthread_mutexattr_init(&mta);
+  DCHECK_EQ(rv, 0) << ". " << strerror(rv);
+#if PRIORITY_INHERITANCE_LOCKS_POSSIBLE()
+  if (PriorityInheritanceAvailable()) {
+    rv = pthread_mutexattr_setprotocol(&mta, PTHREAD_PRIO_INHERIT);
+    DCHECK_EQ(rv, 0) << ". " << strerror(rv);
+  }
+#endif
+#ifndef NDEBUG
+  // In debug, setup attributes for lock error checking.
+  rv = pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_ERRORCHECK);
+  DCHECK_EQ(rv, 0) << ". " << strerror(rv);
+#endif
+  rv = pthread_mutex_init(&native_handle_, &mta);
+  DCHECK_EQ(rv, 0) << ". " << strerror(rv);
+  rv = pthread_mutexattr_destroy(&mta);
+  DCHECK_EQ(rv, 0) << ". " << strerror(rv);
+}
+
+LockImpl::~LockImpl() {
+  int rv = pthread_mutex_destroy(&native_handle_);
+  DCHECK_EQ(rv, 0) << ". " << strerror(rv);
+}
+
+bool LockImpl::Try() {
+  int rv = pthread_mutex_trylock(&native_handle_);
+  DCHECK(rv == 0 || rv == EBUSY) << ". " << strerror(rv);
+  return rv == 0;
+}
+
+void LockImpl::Lock() {
+  int rv = pthread_mutex_lock(&native_handle_);
+  DCHECK_EQ(rv, 0) << ". " << strerror(rv);
+}
+
+void LockImpl::Unlock() {
+  int rv = pthread_mutex_unlock(&native_handle_);
+  DCHECK_EQ(rv, 0) << ". " << strerror(rv);
+}
+
+// static
+bool LockImpl::PriorityInheritanceAvailable() {
+#if PRIORITY_INHERITANCE_LOCKS_POSSIBLE() && defined(OS_MACOSX)
+  return true;
+#else
+  // Security concerns prevent the use of priority inheritance mutexes on Linux.
+  //   * CVE-2010-0622 - wake_futex_pi unlocks incorrect, possible DoS.
+  //     https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0622
+  //   * CVE-2012-6647 - Linux < 3.5.1, futex_wait_requeue_pi possible DoS.
+  //     https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-6647
+  //   * CVE-2014-3153 - Linux <= 3.14.5, futex_requeue, privilege escalation.
+  //     https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3153
+  //
+  // If the above were all addressed, we still need a runtime check to deal with
+  // the bug below.
+  //   * glibc Bug 14652: https://sourceware.org/bugzilla/show_bug.cgi?id=14652
+  //     Fixed in glibc 2.17.
+  //     Priority inheritance mutexes may deadlock with condition variables
+  //     during recacquisition of the mutex after the condition variable is
+  //     signalled.
+  return false;
+#endif
+}
+
+}  // namespace internal
+}  // namespace base
diff --git a/ipc/chromium/src/base/lock_impl_win.cc b/ipc/chromium/src/base/lock_impl_win.cc
new file mode 100644
index 0000000000..fc16b3a464
--- /dev/null
+++ b/ipc/chromium/src/base/lock_impl_win.cc
@@ -0,0 +1,23 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/lock_impl.h"
+
+namespace base {
+namespace internal {
+
+LockImpl::LockImpl() : native_handle_(SRWLOCK_INIT) {}
+
+LockImpl::~LockImpl() = default;
+
+bool LockImpl::Try() { return !!::TryAcquireSRWLockExclusive(&native_handle_); }
+
+void LockImpl::Lock() { ::AcquireSRWLockExclusive(&native_handle_); }
+
+void LockImpl::Unlock() { ::ReleaseSRWLockExclusive(&native_handle_); }
+
+}  // namespace internal
+}  // namespace base
diff --git a/ipc/chromium/src/base/logging.cc b/ipc/chromium/src/base/logging.cc
new file mode 100644
index 0000000000..217ae80844
--- /dev/null
+++ b/ipc/chromium/src/base/logging.cc
@@ -0,0 +1,87 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/logging.h"
+
+#include <utility>
+
+#include "base/string_util.h"
+#include "nsXPCOM.h"
+
+namespace mozilla {
+
+Logger::~Logger() {
+  LogLevel prlevel = LogLevel::Debug;
+  int xpcomlevel = -1;
+
+  switch (mSeverity) {
+    case LOG_INFO:
+      prlevel = LogLevel::Debug;
+      xpcomlevel = -1;
+      break;
+
+    case LOG_WARNING:
+      prlevel = LogLevel::Warning;
+      xpcomlevel = NS_DEBUG_WARNING;
+      break;
+
+    case LOG_ERROR:
+      prlevel = LogLevel::Error;
+      xpcomlevel = NS_DEBUG_WARNING;
+      break;
+
+    case LOG_ERROR_REPORT:
+      prlevel = LogLevel::Error;
+      xpcomlevel = NS_DEBUG_ASSERTION;
+      break;
+
+    case LOG_FATAL:
+      prlevel = LogLevel::Error;
+      xpcomlevel = NS_DEBUG_ABORT;
+      break;
+  }
+
+  MOZ_LOG(gChromiumPRLog, prlevel,
+          ("%s:%i: %s", mFile, mLine, mMsg ? mMsg.get() : "<no message>"));
+  if (xpcomlevel != -1)
+    NS_DebugBreak(xpcomlevel, mMsg.get(), NULL, mFile, mLine);
+}
+
+void Logger::printf(const char* fmt, ...) {
+  va_list args;
+  va_start(args, fmt);
+  mMsg = mozilla::VsmprintfAppend(std::move(mMsg), fmt, args);
+  va_end(args);
+}
+
+LazyLogModule Logger::gChromiumPRLog("chromium");
+
+mozilla::Logger& operator<<(mozilla::Logger& log, const char* s) {
+  log.printf("%s", s);
+  return log;
+}
+
+mozilla::Logger& operator<<(mozilla::Logger& log, const std::string& s) {
+  log.printf("%s", s.c_str());
+  return log;
+}
+
+mozilla::Logger& operator<<(mozilla::Logger& log, int i) {
+  log.printf("%i", i);
+  return log;
+}
+
+mozilla::Logger& operator<<(mozilla::Logger& log, const std::wstring& s) {
+  log.printf("%s", WideToASCII(s).c_str());
+  return log;
+}
+
+mozilla::Logger& operator<<(mozilla::Logger& log, void* p) {
+  log.printf("%p", p);
+  return log;
+}
+
+}  // namespace mozilla
diff --git a/ipc/chromium/src/base/logging.h b/ipc/chromium/src/base/logging.h
new file mode 100644
index 0000000000..4313f131b3
--- /dev/null
+++ b/ipc/chromium/src/base/logging.h
@@ -0,0 +1,132 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_LOGGING_H_
+#define BASE_LOGGING_H_
+
+#include <string>
+#include <cstring>
+
+#include "base/basictypes.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/Logging.h"
+#include "mozilla/Printf.h"
+
+#ifdef NO_CHROMIUM_LOGGING
+#  include <sstream>
+#endif
+
+// Replace the Chromium logging code with NSPR-based logging code and
+// some C++ wrappers to emulate std::ostream
+
+namespace mozilla {
+
+enum LogSeverity {
+  LOG_INFO,
+  LOG_WARNING,
+  LOG_ERROR,
+  LOG_ERROR_REPORT,
+  LOG_FATAL,
+  LOG_0 = LOG_ERROR
+};
+
+class Logger {
+ public:
+  Logger(LogSeverity severity, const char* file, int line)
+      : mSeverity(severity), mFile(file), mLine(line) {}
+
+  ~Logger();
+
+  // not private so that the operator<< overloads can get to it
+  void printf(const char* fmt, ...) MOZ_FORMAT_PRINTF(2, 3);
+
+ private:
+  static mozilla::LazyLogModule gChromiumPRLog;
+  //  static PRLogModuleInfo* GetLog();
+
+  LogSeverity mSeverity;
+  const char* mFile;
+  int mLine;
+  SmprintfPointer mMsg;
+
+  DISALLOW_EVIL_CONSTRUCTORS(Logger);
+};
+
+class LogWrapper {
+ public:
+  LogWrapper(LogSeverity severity, const char* file, int line)
+      : log(severity, file, line) {}
+
+  operator Logger&() const { return log; }
+
+ private:
+  mutable Logger log;
+
+  DISALLOW_EVIL_CONSTRUCTORS(LogWrapper);
+};
+
+struct EmptyLog {};
+
+mozilla::Logger& operator<<(mozilla::Logger& log, const char* s);
+mozilla::Logger& operator<<(mozilla::Logger& log, const std::string& s);
+mozilla::Logger& operator<<(mozilla::Logger& log, int i);
+mozilla::Logger& operator<<(mozilla::Logger& log, const std::wstring& s);
+mozilla::Logger& operator<<(mozilla::Logger& log, void* p);
+
+template <class T>
+const mozilla::EmptyLog& operator<<(const mozilla::EmptyLog& log, const T&) {
+  return log;
+}
+
+}  // namespace mozilla
+
+#ifdef NO_CHROMIUM_LOGGING
+#  define CHROMIUM_LOG(info) std::stringstream()
+#  define LOG_IF(info, condition) \
+    if (!(condition)) std::stringstream()
+#else
+#  define CHROMIUM_LOG(info) \
+    mozilla::LogWrapper(mozilla::LOG_##info, __FILE__, __LINE__)
+#  define LOG_IF(info, condition) \
+    if (!(condition))             \
+    mozilla::LogWrapper(mozilla::LOG_##info, __FILE__, __LINE__)
+#endif
+
+#ifdef DEBUG
+#  define DLOG(info) CHROMIUM_LOG(info)
+#  define DLOG_IF(info, condition) LOG_IF(info, condition)
+#  define DCHECK(condition) CHECK(condition)
+#else
+#  define DLOG(info) mozilla::EmptyLog()
+#  define DLOG_IF(info, condition) mozilla::EmptyLog()
+#  define DCHECK(condition) \
+    while (false && (condition)) mozilla::EmptyLog()
+#endif
+
+#define DVLOG(level) DLOG(INFO)
+
+#undef LOG_ASSERT
+#define LOG_ASSERT(cond) CHECK(0)
+#define DLOG_ASSERT(cond) DCHECK(0)
+
+#define NOTREACHED() CHROMIUM_LOG(ERROR)
+#define NOTIMPLEMENTED() CHROMIUM_LOG(ERROR)
+
+#undef CHECK
+#ifdef FUZZING
+#  define CHECK(condition) LOG_IF(WARNING, condition)
+#else
+#  define CHECK(condition) LOG_IF(FATAL, condition)
+#endif
+
+#define DCHECK_EQ(v1, v2) DCHECK((v1) == (v2))
+#define DCHECK_NE(v1, v2) DCHECK((v1) != (v2))
+#define DCHECK_LE(v1, v2) DCHECK((v1) <= (v2))
+#define DCHECK_LT(v1, v2) DCHECK((v1) < (v2))
+#define DCHECK_GE(v1, v2) DCHECK((v1) >= (v2))
+#define DCHECK_GT(v1, v2) DCHECK((v1) > (v2))
+
+#endif  // BASE_LOGGING_H_
diff --git a/ipc/chromium/src/base/mac_util.h b/ipc/chromium/src/base/mac_util.h
new file mode 100644
index 0000000000..6af2bd7032
--- /dev/null
+++ b/ipc/chromium/src/base/mac_util.h
@@ -0,0 +1,17 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MAC_UTIL_H_
+#define BASE_MAC_UTIL_H_
+
+namespace mac_util {
+
+// Returns true if the application is running from a bundle
+bool AmIBundled();
+
+}  // namespace mac_util
+
+#endif  // BASE_MAC_UTIL_H_
diff --git a/ipc/chromium/src/base/mac_util.mm b/ipc/chromium/src/base/mac_util.mm
new file mode 100644
index 0000000000..a8564127df
--- /dev/null
+++ b/ipc/chromium/src/base/mac_util.mm
@@ -0,0 +1,32 @@
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/mac_util.h"
+
+#include <Carbon/Carbon.h>
+#import <Cocoa/Cocoa.h>
+
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "base/scoped_cftyperef.h"
+#include "base/sys_string_conversions.h"
+
+namespace mac_util {
+
+// Adapted from http://developer.apple.com/carbon/tipsandtricks.html#AmIBundled
+bool AmIBundled() {
+  ProcessSerialNumber psn = {0, kCurrentProcess};
+
+  FSRef fsref;
+  if (GetProcessBundleLocation(&psn, &fsref) != noErr) return false;
+
+  FSCatalogInfo info;
+  if (FSGetCatalogInfo(&fsref, kFSCatInfoNodeFlags, &info, NULL, NULL, NULL) != noErr) {
+    return false;
+  }
+
+  return info.nodeFlags & kFSNodeIsDirectoryMask;
+}
+
+}  // namespace mac_util
diff --git a/ipc/chromium/src/base/message_loop.cc b/ipc/chromium/src/base/message_loop.cc
new file mode 100644
index 0000000000..e7178a6792
--- /dev/null
+++ b/ipc/chromium/src/base/message_loop.cc
@@ -0,0 +1,723 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/message_loop.h"
+
+#include <algorithm>
+
+#include "base/compiler_specific.h"
+#include "base/logging.h"
+#include "base/message_pump_default.h"
+#include "base/string_util.h"
+#include "base/thread_local.h"
+#include "mozilla/Atomics.h"
+#include "mozilla/Mutex.h"
+#include "mozilla/ProfilerRunnable.h"
+#include "nsIEventTarget.h"
+#include "nsITargetShutdownTask.h"
+#include "nsThreadUtils.h"
+
+#if defined(OS_MACOSX)
+#  include "base/message_pump_mac.h"
+#endif
+#if defined(OS_POSIX)
+#  include "base/message_pump_libevent.h"
+#endif
+#if defined(OS_LINUX) || defined(OS_BSD)
+#  if defined(MOZ_WIDGET_GTK)
+#    include "base/message_pump_glib.h"
+#  endif
+#endif
+#ifdef ANDROID
+#  include "base/message_pump_android.h"
+#endif
+#include "nsISerialEventTarget.h"
+
+#include "mozilla/ipc/MessagePump.h"
+#include "nsThreadUtils.h"
+
+using base::Time;
+using base::TimeDelta;
+using base::TimeTicks;
+
+using mozilla::Runnable;
+
+static base::ThreadLocalPointer<MessageLoop>& get_tls_ptr() {
+  static base::ThreadLocalPointer<MessageLoop> tls_ptr;
+  return tls_ptr;
+}
+
+//------------------------------------------------------------------------------
+
+#if defined(OS_WIN)
+
+// Upon a SEH exception in this thread, it restores the original unhandled
+// exception filter.
+static int SEHFilter(LPTOP_LEVEL_EXCEPTION_FILTER old_filter) {
+  ::SetUnhandledExceptionFilter(old_filter);
+  return EXCEPTION_CONTINUE_SEARCH;
+}
+
+// Retrieves a pointer to the current unhandled exception filter. There
+// is no standalone getter method.
+static LPTOP_LEVEL_EXCEPTION_FILTER GetTopSEHFilter() {
+  LPTOP_LEVEL_EXCEPTION_FILTER top_filter = NULL;
+  top_filter = ::SetUnhandledExceptionFilter(0);
+  ::SetUnhandledExceptionFilter(top_filter);
+  return top_filter;
+}
+
+#endif  // defined(OS_WIN)
+
+//------------------------------------------------------------------------------
+
+class MessageLoop::EventTarget : public nsISerialEventTarget,
+                                 public nsITargetShutdownTask,
+                                 public MessageLoop::DestructionObserver {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIEVENTTARGET_FULL
+
+  void TargetShutdown() override {
+    nsTArray<nsCOMPtr<nsITargetShutdownTask>> shutdownTasks;
+    {
+      mozilla::MutexAutoLock lock(mMutex);
+      if (mShutdownTasksRun) {
+        return;
+      }
+      mShutdownTasksRun = true;
+      shutdownTasks = std::move(mShutdownTasks);
+      mShutdownTasks.Clear();
+    }
+
+    for (auto& task : shutdownTasks) {
+      task->TargetShutdown();
+    }
+  }
+
+  explicit EventTarget(MessageLoop* aLoop)
+      : mMutex("MessageLoop::EventTarget"), mLoop(aLoop) {
+    aLoop->AddDestructionObserver(this);
+  }
+
+ private:
+  virtual ~EventTarget() {
+    if (mLoop) {
+      mLoop->RemoveDestructionObserver(this);
+    }
+    MOZ_ASSERT(mShutdownTasks.IsEmpty());
+  }
+
+  void WillDestroyCurrentMessageLoop() override {
+    {
+      mozilla::MutexAutoLock lock(mMutex);
+      // The MessageLoop is being destroyed and we are called from its
+      // destructor There's no real need to remove ourselves from the
+      // destruction observer list. But it makes things look tidier.
+      mLoop->RemoveDestructionObserver(this);
+      mLoop = nullptr;
+    }
+
+    TargetShutdown();
+  }
+
+  mozilla::Mutex mMutex;
+  bool mShutdownTasksRun MOZ_GUARDED_BY(mMutex) = false;
+  nsTArray<nsCOMPtr<nsITargetShutdownTask>> mShutdownTasks
+      MOZ_GUARDED_BY(mMutex);
+  MessageLoop* mLoop MOZ_GUARDED_BY(mMutex);
+};
+
+NS_IMPL_ISUPPORTS(MessageLoop::EventTarget, nsIEventTarget,
+                  nsISerialEventTarget)
+
+NS_IMETHODIMP_(bool)
+MessageLoop::EventTarget::IsOnCurrentThreadInfallible() {
+  mozilla::MutexAutoLock lock(mMutex);
+  return mLoop == MessageLoop::current();
+}
+
+NS_IMETHODIMP
+MessageLoop::EventTarget::IsOnCurrentThread(bool* aResult) {
+  *aResult = IsOnCurrentThreadInfallible();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MessageLoop::EventTarget::DispatchFromScript(nsIRunnable* aEvent,
+                                             uint32_t aFlags) {
+  nsCOMPtr<nsIRunnable> event(aEvent);
+  return Dispatch(event.forget(), aFlags);
+}
+
+NS_IMETHODIMP
+MessageLoop::EventTarget::Dispatch(already_AddRefed<nsIRunnable> aEvent,
+                                   uint32_t aFlags) {
+  mozilla::MutexAutoLock lock(mMutex);
+  if (!mLoop) {
+    return NS_ERROR_NOT_INITIALIZED;
+  }
+
+  if (aFlags != NS_DISPATCH_NORMAL) {
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
+  mLoop->PostTask(std::move(aEvent));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MessageLoop::EventTarget::DelayedDispatch(already_AddRefed<nsIRunnable> aEvent,
+                                          uint32_t aDelayMs) {
+  mozilla::MutexAutoLock lock(mMutex);
+  if (!mLoop) {
+    return NS_ERROR_NOT_INITIALIZED;
+  }
+
+  mLoop->PostDelayedTask(std::move(aEvent), aDelayMs);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MessageLoop::EventTarget::RegisterShutdownTask(nsITargetShutdownTask* aTask) {
+  mozilla::MutexAutoLock lock(mMutex);
+  if (!mLoop || mShutdownTasksRun) {
+    return NS_ERROR_UNEXPECTED;
+  }
+  MOZ_ASSERT(!mShutdownTasks.Contains(aTask));
+  mShutdownTasks.AppendElement(aTask);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MessageLoop::EventTarget::UnregisterShutdownTask(nsITargetShutdownTask* aTask) {
+  mozilla::MutexAutoLock lock(mMutex);
+  if (!mLoop || mShutdownTasksRun) {
+    return NS_ERROR_UNEXPECTED;
+  }
+  return mShutdownTasks.RemoveElement(aTask) ? NS_OK : NS_ERROR_UNEXPECTED;
+}
+
+//------------------------------------------------------------------------------
+
+// static
+MessageLoop* MessageLoop::current() { return get_tls_ptr().Get(); }
+
+// static
+void MessageLoop::set_current(MessageLoop* loop) { get_tls_ptr().Set(loop); }
+
+static mozilla::Atomic<int32_t> message_loop_id_seq(0);
+
+MessageLoop::MessageLoop(Type type, nsISerialEventTarget* aEventTarget)
+    : type_(type),
+      id_(++message_loop_id_seq),
+      nestable_tasks_allowed_(true),
+      exception_restoration_(false),
+      incoming_queue_lock_("MessageLoop Incoming Queue Lock"),
+      state_(NULL),
+      run_depth_base_(1),
+      shutting_down_(false),
+#ifdef OS_WIN
+      os_modal_loop_(false),
+#endif  // OS_WIN
+      transient_hang_timeout_(0),
+      permanent_hang_timeout_(0),
+      next_sequence_num_(0) {
+  DCHECK(!current()) << "should only have one message loop per thread";
+  get_tls_ptr().Set(this);
+
+  // Must initialize after current() is initialized.
+  mEventTarget = new EventTarget(this);
+
+  switch (type_) {
+    case TYPE_MOZILLA_PARENT:
+      MOZ_RELEASE_ASSERT(!aEventTarget);
+      pump_ = new mozilla::ipc::MessagePump(aEventTarget);
+      return;
+    case TYPE_MOZILLA_CHILD:
+      MOZ_RELEASE_ASSERT(!aEventTarget);
+      pump_ = new mozilla::ipc::MessagePumpForChildProcess();
+      // There is a MessageLoop Run call from XRE_InitChildProcess
+      // and another one from MessagePumpForChildProcess. The one
+      // from MessagePumpForChildProcess becomes the base, so we need
+      // to set run_depth_base_ to 2 or we'll never be able to process
+      // Idle tasks.
+      run_depth_base_ = 2;
+      return;
+    case TYPE_MOZILLA_NONMAINTHREAD:
+      pump_ = new mozilla::ipc::MessagePumpForNonMainThreads(aEventTarget);
+      return;
+#if defined(OS_WIN) || defined(OS_MACOSX)
+    case TYPE_MOZILLA_NONMAINUITHREAD:
+      pump_ = new mozilla::ipc::MessagePumpForNonMainUIThreads(aEventTarget);
+      return;
+#elif defined(MOZ_WIDGET_ANDROID)
+    case TYPE_MOZILLA_ANDROID_UI:
+      MOZ_RELEASE_ASSERT(aEventTarget);
+      pump_ = new mozilla::ipc::MessagePumpForAndroidUI(aEventTarget);
+      return;
+#endif  // defined(MOZ_WIDGET_ANDROID)
+    default:
+      // Create one of Chromium's standard MessageLoop types below.
+      break;
+  }
+
+#if defined(OS_WIN)
+  // TODO(rvargas): Get rid of the OS guards.
+  if (type_ == TYPE_DEFAULT) {
+    pump_ = new base::MessagePumpDefault();
+  } else if (type_ == TYPE_IO) {
+    pump_ = new base::MessagePumpForIO();
+  } else {
+    DCHECK(type_ == TYPE_UI);
+    pump_ = new base::MessagePumpForUI();
+  }
+#elif defined(OS_POSIX)
+  if (type_ == TYPE_UI) {
+#  if defined(OS_MACOSX)
+    pump_ = base::MessagePumpMac::Create();
+#  elif defined(OS_LINUX) || defined(OS_BSD)
+    pump_ = new base::MessagePumpForUI();
+#  endif  // OS_LINUX
+  } else if (type_ == TYPE_IO) {
+    pump_ = new base::MessagePumpLibevent();
+  } else {
+    pump_ = new base::MessagePumpDefault();
+  }
+#endif    // OS_POSIX
+
+  // We want GetCurrentSerialEventTarget() to return the real nsThread if it
+  // will be used to dispatch tasks. However, under all other cases; we'll want
+  // it to return this MessageLoop's EventTarget.
+  if (nsISerialEventTarget* thread = pump_->GetXPCOMThread()) {
+    MOZ_ALWAYS_SUCCEEDS(thread->RegisterShutdownTask(mEventTarget));
+  } else {
+    mozilla::SerialEventTargetGuard::Set(mEventTarget);
+  }
+}
+
+MessageLoop::~MessageLoop() {
+  DCHECK(this == current());
+
+  // Let interested parties have one last shot at accessing this.
+  FOR_EACH_OBSERVER(DestructionObserver, destruction_observers_,
+                    WillDestroyCurrentMessageLoop());
+
+  DCHECK(!state_);
+
+  // Clean up any unprocessed tasks, but take care: deleting a task could
+  // result in the addition of more tasks (e.g., via DeleteSoon).  We set a
+  // limit on the number of times we will allow a deleted task to generate more
+  // tasks.  Normally, we should only pass through this loop once or twice.  If
+  // we end up hitting the loop limit, then it is probably due to one task that
+  // is being stubborn.  Inspect the queues to see who is left.
+  bool did_work;
+  for (int i = 0; i < 100; ++i) {
+    DeletePendingTasks();
+    ReloadWorkQueue();
+    // If we end up with empty queues, then break out of the loop.
+    did_work = DeletePendingTasks();
+    if (!did_work) break;
+  }
+  DCHECK(!did_work);
+
+  // OK, now make it so that no one can find us.
+  get_tls_ptr().Set(NULL);
+}
+
+void MessageLoop::AddDestructionObserver(DestructionObserver* obs) {
+  DCHECK(this == current());
+  destruction_observers_.AddObserver(obs);
+}
+
+void MessageLoop::RemoveDestructionObserver(DestructionObserver* obs) {
+  DCHECK(this == current());
+  destruction_observers_.RemoveObserver(obs);
+}
+
+void MessageLoop::Run() {
+  AutoRunState save_state(this);
+  RunHandler();
+}
+
+// Runs the loop in two different SEH modes:
+// enable_SEH_restoration_ = false : any unhandled exception goes to the last
+// one that calls SetUnhandledExceptionFilter().
+// enable_SEH_restoration_ = true : any unhandled exception goes to the filter
+// that was existed before the loop was run.
+void MessageLoop::RunHandler() {
+#if defined(OS_WIN)
+  if (exception_restoration_) {
+    LPTOP_LEVEL_EXCEPTION_FILTER current_filter = GetTopSEHFilter();
+    MOZ_SEH_TRY { RunInternal(); }
+    MOZ_SEH_EXCEPT(SEHFilter(current_filter)) {}
+    return;
+  }
+#endif
+
+  RunInternal();
+}
+
+//------------------------------------------------------------------------------
+
+void MessageLoop::RunInternal() {
+  DCHECK(this == current());
+  pump_->Run(this);
+}
+
+//------------------------------------------------------------------------------
+// Wrapper functions for use in above message loop framework.
+
+bool MessageLoop::ProcessNextDelayedNonNestableTask() {
+  if (state_->run_depth > run_depth_base_) return false;
+
+  if (deferred_non_nestable_work_queue_.empty()) return false;
+
+  nsCOMPtr<nsIRunnable> task =
+      std::move(deferred_non_nestable_work_queue_.front().task);
+  deferred_non_nestable_work_queue_.pop();
+
+  RunTask(task.forget());
+  return true;
+}
+
+//------------------------------------------------------------------------------
+
+void MessageLoop::Quit() {
+  DCHECK(current() == this);
+  if (state_) {
+    state_->quit_received = true;
+  } else {
+    NOTREACHED() << "Must be inside Run to call Quit";
+  }
+}
+
+void MessageLoop::PostTask(already_AddRefed<nsIRunnable> task) {
+  PostTask_Helper(std::move(task), 0);
+}
+
+void MessageLoop::PostDelayedTask(already_AddRefed<nsIRunnable> task,
+                                  int delay_ms) {
+  PostTask_Helper(std::move(task), delay_ms);
+}
+
+void MessageLoop::PostIdleTask(already_AddRefed<nsIRunnable> task) {
+  DCHECK(current() == this);
+  MOZ_ASSERT(NS_IsMainThread());
+
+  PendingTask pending_task(std::move(task), false);
+  mozilla::LogRunnable::LogDispatch(pending_task.task.get());
+  deferred_non_nestable_work_queue_.push(std::move(pending_task));
+}
+
+// Possibly called on a background thread!
+void MessageLoop::PostTask_Helper(already_AddRefed<nsIRunnable> task,
+                                  int delay_ms) {
+  if (nsISerialEventTarget* target = pump_->GetXPCOMThread()) {
+    nsresult rv;
+    if (delay_ms) {
+      rv = target->DelayedDispatch(std::move(task), delay_ms);
+    } else {
+      rv = target->Dispatch(std::move(task), 0);
+    }
+    MOZ_ALWAYS_SUCCEEDS(rv);
+    return;
+  }
+
+  // Tasks should only be queued before or during the Run loop, not after.
+  MOZ_ASSERT(!shutting_down_);
+
+  PendingTask pending_task(std::move(task), true);
+
+  if (delay_ms > 0) {
+    pending_task.delayed_run_time =
+        TimeTicks::Now() + TimeDelta::FromMilliseconds(delay_ms);
+  } else {
+    DCHECK(delay_ms == 0) << "delay should not be negative";
+  }
+
+  // Warning: Don't try to short-circuit, and handle this thread's tasks more
+  // directly, as it could starve handling of foreign threads.  Put every task
+  // into this queue.
+
+  RefPtr<base::MessagePump> pump;
+  {
+    mozilla::MutexAutoLock locked(incoming_queue_lock_);
+    mozilla::LogRunnable::LogDispatch(pending_task.task.get());
+    incoming_queue_.push(std::move(pending_task));
+    pump = pump_;
+  }
+  // Since the incoming_queue_ may contain a task that destroys this message
+  // loop, we cannot exit incoming_queue_lock_ until we are done with |this|.
+  // We use a stack-based reference to the message pump so that we can call
+  // ScheduleWork outside of incoming_queue_lock_.
+
+  pump->ScheduleWork();
+}
+
+void MessageLoop::SetNestableTasksAllowed(bool allowed) {
+  if (nestable_tasks_allowed_ != allowed) {
+    nestable_tasks_allowed_ = allowed;
+    if (!nestable_tasks_allowed_) return;
+    // Start the native pump if we are not already pumping.
+    pump_->ScheduleWorkForNestedLoop();
+  }
+}
+
+void MessageLoop::ScheduleWork() {
+  // Start the native pump if we are not already pumping.
+  pump_->ScheduleWork();
+}
+
+bool MessageLoop::NestableTasksAllowed() const {
+  return nestable_tasks_allowed_;
+}
+
+//------------------------------------------------------------------------------
+
+void MessageLoop::RunTask(already_AddRefed<nsIRunnable> aTask) {
+  DCHECK(nestable_tasks_allowed_);
+  // Execute the task and assume the worst: It is probably not reentrant.
+  nestable_tasks_allowed_ = false;
+
+  nsCOMPtr<nsIRunnable> task = aTask;
+
+  {
+    mozilla::LogRunnable::Run log(task.get());
+    AUTO_PROFILE_FOLLOWING_RUNNABLE(task);
+    task->Run();
+    task = nullptr;
+  }
+
+  nestable_tasks_allowed_ = true;
+}
+
+bool MessageLoop::DeferOrRunPendingTask(PendingTask&& pending_task) {
+  if (pending_task.nestable || state_->run_depth <= run_depth_base_) {
+    RunTask(pending_task.task.forget());
+    // Show that we ran a task (Note: a new one might arrive as a
+    // consequence!).
+    return true;
+  }
+
+  // We couldn't run the task now because we're in a nested message loop
+  // and the task isn't nestable.
+  mozilla::LogRunnable::LogDispatch(pending_task.task.get());
+  deferred_non_nestable_work_queue_.push(std::move(pending_task));
+  return false;
+}
+
+void MessageLoop::AddToDelayedWorkQueue(const PendingTask& pending_task) {
+  // Move to the delayed work queue.  Initialize the sequence number
+  // before inserting into the delayed_work_queue_.  The sequence number
+  // is used to faciliate FIFO sorting when two tasks have the same
+  // delayed_run_time value.
+  PendingTask new_pending_task(pending_task);
+  new_pending_task.sequence_num = next_sequence_num_++;
+  mozilla::LogRunnable::LogDispatch(new_pending_task.task.get());
+  delayed_work_queue_.push(std::move(new_pending_task));
+}
+
+void MessageLoop::ReloadWorkQueue() {
+  // We can improve performance of our loading tasks from incoming_queue_ to
+  // work_queue_ by waiting until the last minute (work_queue_ is empty) to
+  // load.  That reduces the number of locks-per-task significantly when our
+  // queues get large.
+  if (!work_queue_.empty())
+    return;  // Wait till we *really* need to lock and load.
+
+  // Acquire all we can from the inter-thread queue with one lock acquisition.
+  {
+    mozilla::MutexAutoLock lock(incoming_queue_lock_);
+    if (incoming_queue_.empty()) return;
+    std::swap(incoming_queue_, work_queue_);
+    DCHECK(incoming_queue_.empty());
+  }
+}
+
+bool MessageLoop::DeletePendingTasks() {
+  MOZ_ASSERT(work_queue_.empty());
+  bool did_work = !deferred_non_nestable_work_queue_.empty();
+  while (!deferred_non_nestable_work_queue_.empty()) {
+    deferred_non_nestable_work_queue_.pop();
+  }
+  did_work |= !delayed_work_queue_.empty();
+  while (!delayed_work_queue_.empty()) {
+    delayed_work_queue_.pop();
+  }
+  return did_work;
+}
+
+bool MessageLoop::DoWork() {
+  if (!nestable_tasks_allowed_) {
+    // Task can't be executed right now.
+    return false;
+  }
+
+  for (;;) {
+    ReloadWorkQueue();
+    if (work_queue_.empty()) break;
+
+    // Execute oldest task.
+    do {
+      PendingTask pending_task = std::move(work_queue_.front());
+      work_queue_.pop();
+      if (!pending_task.delayed_run_time.is_null()) {
+        // NB: Don't move, because we use this later!
+        AddToDelayedWorkQueue(pending_task);
+        // If we changed the topmost task, then it is time to re-schedule.
+        if (delayed_work_queue_.top().task == pending_task.task)
+          pump_->ScheduleDelayedWork(pending_task.delayed_run_time);
+      } else {
+        if (DeferOrRunPendingTask(std::move(pending_task))) return true;
+      }
+    } while (!work_queue_.empty());
+  }
+
+  // Nothing happened.
+  return false;
+}
+
+bool MessageLoop::DoDelayedWork(TimeTicks* next_delayed_work_time) {
+  if (!nestable_tasks_allowed_ || delayed_work_queue_.empty()) {
+    *next_delayed_work_time = TimeTicks();
+    return false;
+  }
+
+  if (delayed_work_queue_.top().delayed_run_time > TimeTicks::Now()) {
+    *next_delayed_work_time = delayed_work_queue_.top().delayed_run_time;
+    return false;
+  }
+
+  PendingTask pending_task = delayed_work_queue_.top();
+  delayed_work_queue_.pop();
+
+  if (!delayed_work_queue_.empty())
+    *next_delayed_work_time = delayed_work_queue_.top().delayed_run_time;
+
+  return DeferOrRunPendingTask(std::move(pending_task));
+}
+
+bool MessageLoop::DoIdleWork() {
+  if (ProcessNextDelayedNonNestableTask()) return true;
+
+  if (state_->quit_received) pump_->Quit();
+
+  return false;
+}
+
+//------------------------------------------------------------------------------
+// MessageLoop::AutoRunState
+
+MessageLoop::AutoRunState::AutoRunState(MessageLoop* loop) : loop_(loop) {
+  // Top-level Run should only get called once.
+  MOZ_ASSERT(!loop_->shutting_down_);
+
+  // Make the loop reference us.
+  previous_state_ = loop_->state_;
+  if (previous_state_) {
+    run_depth = previous_state_->run_depth + 1;
+  } else {
+    run_depth = 1;
+  }
+  loop_->state_ = this;
+
+  // Initialize the other fields:
+  quit_received = false;
+#if defined(OS_WIN)
+  dispatcher = NULL;
+#endif
+}
+
+MessageLoop::AutoRunState::~AutoRunState() {
+  loop_->state_ = previous_state_;
+
+  // If exiting a top-level Run, then we're shutting down.
+  loop_->shutting_down_ = !previous_state_;
+}
+
+//------------------------------------------------------------------------------
+// MessageLoop::PendingTask
+
+bool MessageLoop::PendingTask::operator<(const PendingTask& other) const {
+  // Since the top of a priority queue is defined as the "greatest" element, we
+  // need to invert the comparison here.  We want the smaller time to be at the
+  // top of the heap.
+
+  if (delayed_run_time < other.delayed_run_time) return false;
+
+  if (delayed_run_time > other.delayed_run_time) return true;
+
+  // If the times happen to match, then we use the sequence number to decide.
+  // Compare the difference to support integer roll-over.
+  return (sequence_num - other.sequence_num) > 0;
+}
+
+//------------------------------------------------------------------------------
+// MessageLoop::SerialEventTarget
+
+nsISerialEventTarget* MessageLoop::SerialEventTarget() { return mEventTarget; }
+
+//------------------------------------------------------------------------------
+// MessageLoopForUI
+
+#if defined(OS_WIN)
+
+void MessageLoopForUI::Run(Dispatcher* dispatcher) {
+  AutoRunState save_state(this);
+  state_->dispatcher = dispatcher;
+  RunHandler();
+}
+
+void MessageLoopForUI::AddObserver(Observer* observer) {
+  pump_win()->AddObserver(observer);
+}
+
+void MessageLoopForUI::RemoveObserver(Observer* observer) {
+  pump_win()->RemoveObserver(observer);
+}
+
+void MessageLoopForUI::WillProcessMessage(const MSG& message) {
+  pump_win()->WillProcessMessage(message);
+}
+void MessageLoopForUI::DidProcessMessage(const MSG& message) {
+  pump_win()->DidProcessMessage(message);
+}
+void MessageLoopForUI::PumpOutPendingPaintMessages() {
+  pump_ui()->PumpOutPendingPaintMessages();
+}
+
+#endif  // defined(OS_WIN)
+
+//------------------------------------------------------------------------------
+// MessageLoopForIO
+
+#if defined(OS_WIN)
+
+void MessageLoopForIO::RegisterIOHandler(HANDLE file, IOHandler* handler) {
+  pump_io()->RegisterIOHandler(file, handler);
+}
+
+bool MessageLoopForIO::WaitForIOCompletion(DWORD timeout, IOHandler* filter) {
+  return pump_io()->WaitForIOCompletion(timeout, filter);
+}
+
+#elif defined(OS_POSIX)
+
+bool MessageLoopForIO::WatchFileDescriptor(int fd, bool persistent, Mode mode,
+                                           FileDescriptorWatcher* controller,
+                                           Watcher* delegate) {
+  return pump_libevent()->WatchFileDescriptor(
+      fd, persistent, static_cast<base::MessagePumpLibevent::Mode>(mode),
+      controller, delegate);
+}
+
+bool MessageLoopForIO::CatchSignal(int sig, SignalEvent* sigevent,
+                                   SignalWatcher* delegate) {
+  return pump_libevent()->CatchSignal(sig, sigevent, delegate);
+}
+
+#endif
diff --git a/ipc/chromium/src/base/message_loop.h b/ipc/chromium/src/base/message_loop.h
new file mode 100644
index 0000000000..b6e4938ee0
--- /dev/null
+++ b/ipc/chromium/src/base/message_loop.h
@@ -0,0 +1,559 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MESSAGE_LOOP_H_
+#define BASE_MESSAGE_LOOP_H_
+
+#include <deque>
+#include <queue>
+#include <string>
+#include <vector>
+#include <map>
+
+#include "base/message_pump.h"
+#include "base/observer_list.h"
+
+#include "mozilla/Mutex.h"
+
+#if defined(OS_WIN)
+// We need this to declare base::MessagePumpWin::Dispatcher, which we should
+// really just eliminate.
+#  include "base/message_pump_win.h"
+#elif defined(OS_POSIX)
+#  include "base/message_pump_libevent.h"
+#endif
+
+#include "nsCOMPtr.h"
+#include "nsIRunnable.h"
+#include "nsThreadUtils.h"
+
+class nsISerialEventTarget;
+
+namespace mozilla {
+namespace ipc {
+
+class DoWorkRunnable;
+
+} /* namespace ipc */
+} /* namespace mozilla */
+
+// A MessageLoop is used to process events for a particular thread.  There is
+// at most one MessageLoop instance per thread.
+//
+// Events include at a minimum Task instances submitted to PostTask or those
+// managed by TimerManager.  Depending on the type of message pump used by the
+// MessageLoop other events such as UI messages may be processed.  On Windows
+// APC calls (as time permits) and signals sent to a registered set of HANDLEs
+// may also be processed.
+//
+// NOTE: Unless otherwise specified, a MessageLoop's methods may only be called
+// on the thread where the MessageLoop's Run method executes.
+//
+// NOTE: MessageLoop has task reentrancy protection.  This means that if a
+// task is being processed, a second task cannot start until the first task is
+// finished.  Reentrancy can happen when processing a task, and an inner
+// message pump is created.  That inner pump then processes native messages
+// which could implicitly start an inner task.  Inner message pumps are created
+// with dialogs (DialogBox), common dialogs (GetOpenFileName), OLE functions
+// (DoDragDrop), printer functions (StartDoc) and *many* others.
+//
+// Sample workaround when inner task processing is needed:
+//   bool old_state = MessageLoop::current()->NestableTasksAllowed();
+//   MessageLoop::current()->SetNestableTasksAllowed(true);
+//   HRESULT hr = DoDragDrop(...); // Implicitly runs a modal message loop here.
+//   MessageLoop::current()->SetNestableTasksAllowed(old_state);
+//   // Process hr  (the result returned by DoDragDrop().
+//
+// Please be SURE your task is reentrant (nestable) and all global variables
+// are stable and accessible before calling SetNestableTasksAllowed(true).
+//
+class MessageLoop : public base::MessagePump::Delegate {
+  friend class mozilla::ipc::DoWorkRunnable;
+
+ public:
+  // A DestructionObserver is notified when the current MessageLoop is being
+  // destroyed.  These obsevers are notified prior to MessageLoop::current()
+  // being changed to return NULL.  This gives interested parties the chance to
+  // do final cleanup that depends on the MessageLoop.
+  //
+  // NOTE: Any tasks posted to the MessageLoop during this notification will
+  // not be run.  Instead, they will be deleted.
+  //
+  class DestructionObserver {
+   public:
+    virtual ~DestructionObserver() {}
+    virtual void WillDestroyCurrentMessageLoop() = 0;
+  };
+
+  // Add a DestructionObserver, which will start receiving notifications
+  // immediately.
+  void AddDestructionObserver(DestructionObserver* destruction_observer);
+
+  // Remove a DestructionObserver.  It is safe to call this method while a
+  // DestructionObserver is receiving a notification callback.
+  void RemoveDestructionObserver(DestructionObserver* destruction_observer);
+
+  // The "PostTask" family of methods call the task's Run method asynchronously
+  // from within a message loop at some point in the future.
+  //
+  // With the PostTask variant, tasks are invoked in FIFO order, inter-mixed
+  // with normal UI or IO event processing.  With the PostDelayedTask variant,
+  // tasks are called after at least approximately 'delay_ms' have elapsed.
+  //
+  // The NonNestable variants work similarly except that they promise never to
+  // dispatch the task from a nested invocation of MessageLoop::Run.  Instead,
+  // such tasks get deferred until the top-most MessageLoop::Run is executing.
+  //
+  // The MessageLoop takes ownership of the Task, and deletes it after it has
+  // been Run().
+  //
+  // New tasks should not be posted after the invocation of a MessageLoop's
+  // Run method. Otherwise, they may fail to actually run. Callers should check
+  // if the MessageLoop is processing tasks if necessary by calling
+  // IsAcceptingTasks().
+  //
+  // NOTE: These methods may be called on any thread.  The Task will be invoked
+  // on the thread that executes MessageLoop::Run().
+
+  bool IsAcceptingTasks() const { return !shutting_down_; }
+
+  void PostTask(already_AddRefed<nsIRunnable> task);
+
+  void PostDelayedTask(already_AddRefed<nsIRunnable> task, int delay_ms);
+
+  // PostIdleTask is not thread safe and should be called on this thread
+  void PostIdleTask(already_AddRefed<nsIRunnable> task);
+
+  // Run the message loop.
+  void Run();
+
+  // Signals the Run method to return after it is done processing all pending
+  // messages.  This method may only be called on the same thread that called
+  // Run, and Run must still be on the call stack.
+  //
+  // Use QuitTask if you need to Quit another thread's MessageLoop, but note
+  // that doing so is fairly dangerous if the target thread makes nested calls
+  // to MessageLoop::Run.  The problem being that you won't know which nested
+  // run loop you are quiting, so be careful!
+  //
+  void Quit();
+
+  // Invokes Quit on the current MessageLoop when run.  Useful to schedule an
+  // arbitrary MessageLoop to Quit.
+  class QuitTask : public mozilla::Runnable {
+   public:
+    QuitTask() : mozilla::Runnable("QuitTask") {}
+    NS_IMETHOD Run() override {
+      MessageLoop::current()->Quit();
+      return NS_OK;
+    }
+  };
+
+  // Return an XPCOM-compatible event target for this thread.
+  nsISerialEventTarget* SerialEventTarget();
+
+  // A MessageLoop has a particular type, which indicates the set of
+  // asynchronous events it may process in addition to tasks and timers.
+  //
+  // TYPE_DEFAULT
+  //   This type of ML only supports tasks and timers.
+  //
+  // TYPE_UI
+  //   This type of ML also supports native UI events (e.g., Windows messages).
+  //   See also MessageLoopForUI.
+  //
+  // TYPE_IO
+  //   This type of ML also supports asynchronous IO.  See also
+  //   MessageLoopForIO.
+  //
+  // TYPE_MOZILLA_CHILD
+  //   This type of ML is used in Mozilla child processes which initialize
+  //   XPCOM and use the gecko event loop.
+  //
+  // TYPE_MOZILLA_PARENT
+  //   This type of ML is used in Mozilla parent processes which initialize
+  //   XPCOM and use the gecko event loop.
+  //
+  // TYPE_MOZILLA_NONMAINTHREAD
+  //   This type of ML is used in Mozilla parent processes which initialize
+  //   XPCOM and use the nsThread event loop.
+  //
+  // TYPE_MOZILLA_NONMAINUITHREAD
+  //   This type of ML is used in Mozilla processes which initialize XPCOM
+  //   and use TYPE_UI loop logic.
+  //
+  enum Type {
+    TYPE_DEFAULT,
+    TYPE_UI,
+    TYPE_IO,
+    TYPE_MOZILLA_CHILD,
+    TYPE_MOZILLA_PARENT,
+    TYPE_MOZILLA_NONMAINTHREAD,
+    TYPE_MOZILLA_NONMAINUITHREAD,
+    TYPE_MOZILLA_ANDROID_UI
+  };
+
+  // Normally, it is not necessary to instantiate a MessageLoop.  Instead, it
+  // is typical to make use of the current thread's MessageLoop instance.
+  explicit MessageLoop(Type type = TYPE_DEFAULT,
+                       nsISerialEventTarget* aEventTarget = nullptr);
+  ~MessageLoop();
+
+  // Returns the type passed to the constructor.
+  Type type() const { return type_; }
+
+  // Unique, non-repeating ID for this message loop.
+  int32_t id() const { return id_; }
+
+  // Optional call to connect the thread name with this loop.
+  void set_thread_name(const std::string& aThreadName) {
+    DCHECK(thread_name_.empty()) << "Should not rename this thread!";
+    thread_name_ = aThreadName;
+  }
+  const std::string& thread_name() const { return thread_name_; }
+
+  // Returns the MessageLoop object for the current thread, or null if none.
+  static MessageLoop* current();
+
+  static void set_current(MessageLoop* loop);
+
+  // Enables or disables the recursive task processing. This happens in the case
+  // of recursive message loops. Some unwanted message loop may occurs when
+  // using common controls or printer functions. By default, recursive task
+  // processing is disabled.
+  //
+  // The specific case where tasks get queued is:
+  // - The thread is running a message loop.
+  // - It receives a task #1 and execute it.
+  // - The task #1 implicitly start a message loop, like a MessageBox in the
+  //   unit test. This can also be StartDoc or GetSaveFileName.
+  // - The thread receives a task #2 before or while in this second message
+  //   loop.
+  // - With NestableTasksAllowed set to true, the task #2 will run right away.
+  //   Otherwise, it will get executed right after task #1 completes at "thread
+  //   message loop level".
+  void SetNestableTasksAllowed(bool allowed);
+  void ScheduleWork();
+  bool NestableTasksAllowed() const;
+
+  // Enables or disables the restoration during an exception of the unhandled
+  // exception filter that was active when Run() was called. This can happen
+  // if some third party code call SetUnhandledExceptionFilter() and never
+  // restores the previous filter.
+  void set_exception_restoration(bool restore) {
+    exception_restoration_ = restore;
+  }
+
+#if defined(OS_WIN)
+  void set_os_modal_loop(bool os_modal_loop) { os_modal_loop_ = os_modal_loop; }
+
+  bool& os_modal_loop() { return os_modal_loop_; }
+#endif  // OS_WIN
+
+  // Set the timeouts for background hang monitoring.
+  // A value of 0 indicates there is no timeout.
+  void set_hang_timeouts(uint32_t transient_timeout_ms,
+                         uint32_t permanent_timeout_ms) {
+    transient_hang_timeout_ = transient_timeout_ms;
+    permanent_hang_timeout_ = permanent_timeout_ms;
+  }
+  uint32_t transient_hang_timeout() const { return transient_hang_timeout_; }
+  uint32_t permanent_hang_timeout() const { return permanent_hang_timeout_; }
+
+  //----------------------------------------------------------------------------
+ protected:
+  struct RunState {
+    // Used to count how many Run() invocations are on the stack.
+    int run_depth;
+
+    // Used to record that Quit() was called, or that we should quit the pump
+    // once it becomes idle.
+    bool quit_received;
+
+#if defined(OS_WIN)
+    base::MessagePumpWin::Dispatcher* dispatcher;
+#endif
+  };
+
+  class AutoRunState : RunState {
+   public:
+    explicit AutoRunState(MessageLoop* loop);
+    ~AutoRunState();
+
+   private:
+    MessageLoop* loop_;
+    RunState* previous_state_;
+  };
+
+  // This structure is copied around by value.
+  struct PendingTask {
+    nsCOMPtr<nsIRunnable> task;        // The task to run.
+    base::TimeTicks delayed_run_time;  // The time when the task should be run.
+    int sequence_num;                  // Secondary sort key for run time.
+    bool nestable;                     // OK to dispatch from a nested loop.
+
+    PendingTask(already_AddRefed<nsIRunnable> aTask, bool aNestable)
+        : task(aTask), sequence_num(0), nestable(aNestable) {}
+
+    PendingTask(PendingTask&& aOther)
+        : task(std::move(aOther.task)),
+          delayed_run_time(aOther.delayed_run_time),
+          sequence_num(aOther.sequence_num),
+          nestable(aOther.nestable) {}
+
+    // std::priority_queue<T>::top is dumb, so we have to have this.
+    PendingTask(const PendingTask& aOther)
+        : task(aOther.task),
+          delayed_run_time(aOther.delayed_run_time),
+          sequence_num(aOther.sequence_num),
+          nestable(aOther.nestable) {}
+    PendingTask& operator=(const PendingTask& aOther) {
+      task = aOther.task;
+      delayed_run_time = aOther.delayed_run_time;
+      sequence_num = aOther.sequence_num;
+      nestable = aOther.nestable;
+      return *this;
+    }
+
+    // Used to support sorting.
+    bool operator<(const PendingTask& other) const;
+  };
+
+  typedef std::queue<PendingTask> TaskQueue;
+  typedef std::priority_queue<PendingTask> DelayedTaskQueue;
+
+#if defined(OS_WIN)
+  base::MessagePumpWin* pump_win() {
+    return static_cast<base::MessagePumpWin*>(pump_.get());
+  }
+#elif defined(OS_POSIX)
+  base::MessagePumpLibevent* pump_libevent() {
+    return static_cast<base::MessagePumpLibevent*>(pump_.get());
+  }
+#endif
+
+  // A function to encapsulate all the exception handling capability in the
+  // stacks around the running of a main message loop.  It will run the message
+  // loop in a SEH try block or not depending on the set_SEH_restoration()
+  // flag.
+  void RunHandler();
+
+  // A surrounding stack frame around the running of the message loop that
+  // supports all saving and restoring of state, as is needed for any/all (ugly)
+  // recursive calls.
+  void RunInternal();
+
+  // Called to process any delayed non-nestable tasks.
+  bool ProcessNextDelayedNonNestableTask();
+
+  //----------------------------------------------------------------------------
+  // Run a work_queue_ task or new_task, and delete it (if it was processed by
+  // PostTask). If there are queued tasks, the oldest one is executed and
+  // new_task is queued. new_task is optional and can be NULL. In this NULL
+  // case, the method will run one pending task (if any exist). Returns true if
+  // it executes a task.  Queued tasks accumulate only when there is a
+  // non-nestable task currently processing, in which case the new_task is
+  // appended to the list work_queue_.  Such re-entrancy generally happens when
+  // an unrequested message pump (typical of a native dialog) is executing in
+  // the context of a task.
+  bool QueueOrRunTask(already_AddRefed<nsIRunnable> new_task);
+
+  // Runs the specified task and deletes it.
+  void RunTask(already_AddRefed<nsIRunnable> task);
+
+  // Calls RunTask or queues the pending_task on the deferred task list if it
+  // cannot be run right now.  Returns true if the task was run.
+  bool DeferOrRunPendingTask(PendingTask&& pending_task);
+
+  // Adds the pending task to delayed_work_queue_.
+  void AddToDelayedWorkQueue(const PendingTask& pending_task);
+
+  // Load tasks from the incoming_queue_ into work_queue_ if the latter is
+  // empty.  The former requires a lock to access, while the latter is directly
+  // accessible on this thread.
+  void ReloadWorkQueue();
+
+  // Delete tasks that haven't run yet without running them.  Used in the
+  // destructor to make sure all the task's destructors get called.  Returns
+  // true if some work was done.
+  bool DeletePendingTasks();
+
+  // Post a task to our incomming queue.
+  void PostTask_Helper(already_AddRefed<nsIRunnable> task, int delay_ms);
+
+  // base::MessagePump::Delegate methods:
+  virtual bool DoWork() override;
+  virtual bool DoDelayedWork(base::TimeTicks* next_delayed_work_time) override;
+  virtual bool DoIdleWork() override;
+
+  Type type_;
+  int32_t id_;
+
+  // A list of tasks that need to be processed by this instance.  Note that
+  // this queue is only accessed (push/pop) by our current thread.
+  TaskQueue work_queue_;
+
+  // Contains delayed tasks, sorted by their 'delayed_run_time' property.
+  DelayedTaskQueue delayed_work_queue_;
+
+  // A queue of non-nestable tasks that we had to defer because when it came
+  // time to execute them we were in a nested message loop.  They will execute
+  // once we're out of nested message loops.
+  TaskQueue deferred_non_nestable_work_queue_;
+
+  RefPtr<base::MessagePump> pump_;
+
+  base::ObserverList<DestructionObserver> destruction_observers_;
+
+  // A recursion block that prevents accidentally running additonal tasks when
+  // insider a (accidentally induced?) nested message pump.
+  bool nestable_tasks_allowed_;
+
+  bool exception_restoration_;
+
+  std::string thread_name_;
+
+  // A null terminated list which creates an incoming_queue of tasks that are
+  // aquired under a mutex for processing on this instance's thread. These tasks
+  // have not yet been sorted out into items for our work_queue_ vs items that
+  // will be handled by the TimerManager.
+  TaskQueue incoming_queue_ MOZ_GUARDED_BY(incoming_queue_lock_);
+  // Protect access to incoming_queue_.
+  mozilla::Mutex incoming_queue_lock_;
+
+  RunState* state_;
+  int run_depth_base_;
+  bool shutting_down_;
+
+#if defined(OS_WIN)
+  // Should be set to true before calling Windows APIs like TrackPopupMenu, etc
+  // which enter a modal message loop.
+  bool os_modal_loop_;
+#endif
+
+  // Timeout values for hang monitoring
+  uint32_t transient_hang_timeout_;
+  uint32_t permanent_hang_timeout_;
+
+  // The next sequence number to use for delayed tasks.
+  int next_sequence_num_;
+
+  class EventTarget;
+  RefPtr<EventTarget> mEventTarget;
+
+  DISALLOW_COPY_AND_ASSIGN(MessageLoop);
+};
+
+//-----------------------------------------------------------------------------
+// MessageLoopForUI extends MessageLoop with methods that are particular to a
+// MessageLoop instantiated with TYPE_UI.
+//
+// This class is typically used like so:
+//   MessageLoopForUI::current()->...call some method...
+//
+class MessageLoopForUI : public MessageLoop {
+ public:
+  explicit MessageLoopForUI(Type aType = TYPE_UI) : MessageLoop(aType) {}
+
+  // Returns the MessageLoopForUI of the current thread.
+  static MessageLoopForUI* current() {
+    MessageLoop* loop = MessageLoop::current();
+    if (!loop) return NULL;
+    Type type = loop->type();
+    DCHECK(type == MessageLoop::TYPE_UI ||
+           type == MessageLoop::TYPE_MOZILLA_PARENT ||
+           type == MessageLoop::TYPE_MOZILLA_CHILD);
+    return static_cast<MessageLoopForUI*>(loop);
+  }
+
+#if defined(OS_WIN)
+  typedef base::MessagePumpWin::Dispatcher Dispatcher;
+  typedef base::MessagePumpWin::Observer Observer;
+
+  // Please see MessagePumpWin for definitions of these methods.
+  void Run(Dispatcher* dispatcher);
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+  void WillProcessMessage(const MSG& message);
+  void DidProcessMessage(const MSG& message);
+  void PumpOutPendingPaintMessages();
+
+ protected:
+  // TODO(rvargas): Make this platform independent.
+  base::MessagePumpForUI* pump_ui() {
+    return static_cast<base::MessagePumpForUI*>(pump_.get());
+  }
+#endif  // defined(OS_WIN)
+};
+
+// Do not add any member variables to MessageLoopForUI!  This is important b/c
+// MessageLoopForUI is often allocated via MessageLoop(TYPE_UI).  Any extra
+// data that you need should be stored on the MessageLoop's pump_ instance.
+COMPILE_ASSERT(sizeof(MessageLoop) == sizeof(MessageLoopForUI),
+               MessageLoopForUI_should_not_have_extra_member_variables);
+
+//-----------------------------------------------------------------------------
+// MessageLoopForIO extends MessageLoop with methods that are particular to a
+// MessageLoop instantiated with TYPE_IO.
+//
+// This class is typically used like so:
+//   MessageLoopForIO::current()->...call some method...
+//
+class MessageLoopForIO : public MessageLoop {
+ public:
+  MessageLoopForIO() : MessageLoop(TYPE_IO) {}
+
+  // Returns the MessageLoopForIO of the current thread.
+  static MessageLoopForIO* current() {
+    MessageLoop* loop = MessageLoop::current();
+    DCHECK_EQ(MessageLoop::TYPE_IO, loop->type());
+    return static_cast<MessageLoopForIO*>(loop);
+  }
+
+#if defined(OS_WIN)
+  typedef base::MessagePumpForIO::IOHandler IOHandler;
+  typedef base::MessagePumpForIO::IOContext IOContext;
+
+  // Please see MessagePumpWin for definitions of these methods.
+  void RegisterIOHandler(HANDLE file_handle, IOHandler* handler);
+  bool WaitForIOCompletion(DWORD timeout, IOHandler* filter);
+
+ protected:
+  // TODO(rvargas): Make this platform independent.
+  base::MessagePumpForIO* pump_io() {
+    return static_cast<base::MessagePumpForIO*>(pump_.get());
+  }
+
+#elif defined(OS_POSIX)
+  typedef base::MessagePumpLibevent::Watcher Watcher;
+  typedef base::MessagePumpLibevent::FileDescriptorWatcher
+      FileDescriptorWatcher;
+
+  enum Mode {
+    WATCH_READ = base::MessagePumpLibevent::WATCH_READ,
+    WATCH_WRITE = base::MessagePumpLibevent::WATCH_WRITE,
+    WATCH_READ_WRITE = base::MessagePumpLibevent::WATCH_READ_WRITE
+  };
+
+  // Please see MessagePumpLibevent for definition.
+  bool WatchFileDescriptor(int fd, bool persistent, Mode mode,
+                           FileDescriptorWatcher* controller,
+                           Watcher* delegate);
+
+  typedef base::MessagePumpLibevent::SignalEvent SignalEvent;
+  typedef base::MessagePumpLibevent::SignalWatcher SignalWatcher;
+  bool CatchSignal(int sig, SignalEvent* sigevent, SignalWatcher* delegate);
+
+#endif  // defined(OS_POSIX)
+};
+
+// Do not add any member variables to MessageLoopForIO!  This is important b/c
+// MessageLoopForIO is often allocated via MessageLoop(TYPE_IO).  Any extra
+// data that you need should be stored on the MessageLoop's pump_ instance.
+COMPILE_ASSERT(sizeof(MessageLoop) == sizeof(MessageLoopForIO),
+               MessageLoopForIO_should_not_have_extra_member_variables);
+
+#endif  // BASE_MESSAGE_LOOP_H_
diff --git a/ipc/chromium/src/base/message_pump.h b/ipc/chromium/src/base/message_pump.h
new file mode 100644
index 0000000000..884c016d20
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump.h
@@ -0,0 +1,140 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MESSAGE_PUMP_H_
+#define BASE_MESSAGE_PUMP_H_
+
+#include "nsISupportsImpl.h"
+
+class nsISerialEventTarget;
+
+namespace base {
+
+class TimeTicks;
+
+class MessagePump {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MessagePump)
+
+  // Please see the comments above the Run method for an illustration of how
+  // these delegate methods are used.
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+
+    // Called from within Run in response to ScheduleWork or when the message
+    // pump would otherwise call DoDelayedWork.  Returns true to indicate that
+    // work was done.  DoDelayedWork will not be called if DoWork returns true.
+    virtual bool DoWork() = 0;
+
+    // Called from within Run in response to ScheduleDelayedWork or when the
+    // message pump would otherwise sleep waiting for more work.  Returns true
+    // to indicate that delayed work was done.  DoIdleWork will not be called
+    // if DoDelayedWork returns true.  Upon return |next_delayed_work_time|
+    // indicates the time when DoDelayedWork should be called again.  If
+    // |next_delayed_work_time| is null (per Time::is_null), then the queue of
+    // future delayed work (timer events) is currently empty, and no additional
+    // calls to this function need to be scheduled.
+    virtual bool DoDelayedWork(TimeTicks* next_delayed_work_time) = 0;
+
+    // Called from within Run just before the message pump goes to sleep.
+    // Returns true to indicate that idle work was done.
+    virtual bool DoIdleWork() = 0;
+  };
+
+  // The Run method is called to enter the message pump's run loop.
+  //
+  // Within the method, the message pump is responsible for processing native
+  // messages as well as for giving cycles to the delegate periodically.  The
+  // message pump should take care to mix delegate callbacks with native
+  // message processing so neither type of event starves the other of cycles.
+  //
+  // The anatomy of a typical run loop:
+  //
+  //   for (;;) {
+  //     bool did_work = DoInternalWork();
+  //     if (should_quit_)
+  //       break;
+  //
+  //     did_work |= delegate_->DoWork();
+  //     if (should_quit_)
+  //       break;
+  //
+  //     did_work |= delegate_->DoDelayedWork();
+  //     if (should_quit_)
+  //       break;
+  //
+  //     if (did_work)
+  //       continue;
+  //
+  //     did_work = delegate_->DoIdleWork();
+  //     if (should_quit_)
+  //       break;
+  //
+  //     if (did_work)
+  //       continue;
+  //
+  //     WaitForWork();
+  //   }
+  //
+  // Here, DoInternalWork is some private method of the message pump that is
+  // responsible for dispatching the next UI message or notifying the next IO
+  // completion (for example).  WaitForWork is a private method that simply
+  // blocks until there is more work of any type to do.
+  //
+  // Notice that the run loop cycles between calling DoInternalWork, DoWork,
+  // and DoDelayedWork methods.  This helps ensure that neither work queue
+  // starves the other.  This is important for message pumps that are used to
+  // drive animations, for example.
+  //
+  // Notice also that after each callout to foreign code, the run loop checks
+  // to see if it should quit.  The Quit method is responsible for setting this
+  // flag.  No further work is done once the quit flag is set.
+  //
+  // NOTE: Care must be taken to handle Run being called again from within any
+  // of the callouts to foreign code.  Native message pumps may also need to
+  // deal with other native message pumps being run outside their control
+  // (e.g., the MessageBox API on Windows pumps UI messages!).  To be specific,
+  // the callouts (DoWork and DoDelayedWork) MUST still be provided even in
+  // nested sub-loops that are "seemingly" outside the control of this message
+  // pump.  DoWork in particular must never be starved for time slices unless
+  // it returns false (meaning it has run out of things to do).
+  //
+  virtual void Run(Delegate* delegate) = 0;
+
+  // Quit immediately from the most recently entered run loop.  This method may
+  // only be used on the thread that called Run.
+  virtual void Quit() = 0;
+
+  // Schedule a DoWork callback to happen reasonably soon.  Does nothing if a
+  // DoWork callback is already scheduled.  This method may be called from any
+  // thread.  Once this call is made, DoWork should not be "starved" at least
+  // until it returns a value of false.
+  virtual void ScheduleWork() = 0;
+
+  // This method may only called from the thread that called Run.
+  //
+  // Ensure that DoWork will be called if a nested loop is entered.
+  // If a MessagePump can already guarantee that DoWork will be called
+  // "reasonably soon", this method can be a no-op to avoid expensive
+  // atomic tests and/or syscalls required for ScheduleWork().
+  virtual void ScheduleWorkForNestedLoop() { ScheduleWork(); };
+
+  // Schedule a DoDelayedWork callback to happen at the specified time,
+  // cancelling any pending DoDelayedWork callback.  This method may only be
+  // used on the thread that called Run.
+  virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time) = 0;
+
+  // If returned, just use the nsThread.
+  virtual nsISerialEventTarget* GetXPCOMThread() { return nullptr; }
+
+ protected:
+  virtual ~MessagePump(){};
+};
+
+}  // namespace base
+
+#endif  // BASE_MESSAGE_PUMP_H_
diff --git a/ipc/chromium/src/base/message_pump_android.cc b/ipc/chromium/src/base/message_pump_android.cc
new file mode 100644
index 0000000000..6d35534e5c
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_android.cc
@@ -0,0 +1,104 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/message_pump_android.h"
+
+#include <fcntl.h>
+#include <math.h>
+
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+#include "base/platform_thread.h"
+
+namespace mozilla {
+bool ProcessNextEvent();
+void NotifyEvent();
+}  // namespace mozilla
+
+namespace base {
+
+MessagePumpForUI::MessagePumpForUI() : state_(NULL) {}
+
+MessagePumpForUI::~MessagePumpForUI() {}
+
+void MessagePumpForUI::Run(Delegate* delegate) {
+  RunState state;
+  state.delegate = delegate;
+  state.should_quit = false;
+  state.run_depth = state_ ? state_->run_depth + 1 : 1;
+  // We really only do a single task for each iteration of the loop.  If we
+  // have done something, assume there is likely something more to do.  This
+  // will mean that we don't block on the message pump until there was nothing
+  // more to do.  We also set this to true to make sure not to block on the
+  // first iteration of the loop, so RunAllPending() works correctly.
+  state.more_work_is_plausible = true;
+
+  RunState* previous_state = state_;
+  state_ = &state;
+
+  // We run our own loop instead of using g_main_loop_quit in one of the
+  // callbacks.  This is so we only quit our own loops, and we don't quit
+  // nested loops run by others.  TODO(deanm): Is this what we want?
+
+  while (!state_->should_quit) {
+    mozilla::ProcessNextEvent();
+    if (work_scheduled) {
+      work_scheduled = false;
+      HandleDispatch();
+    }
+  }
+
+  state_ = previous_state;
+}
+
+void MessagePumpForUI::HandleDispatch() {
+  // We should only ever have a single message on the wakeup pipe, since we
+  // are only signaled when the queue went from empty to non-empty.  The qApp
+  // poll will tell us whether there was data, so this read shouldn't block.
+  if (state_->should_quit) return;
+
+  state_->more_work_is_plausible = false;
+
+  if (state_->delegate->DoWork()) state_->more_work_is_plausible = true;
+
+  if (state_->should_quit) return;
+
+  if (state_->delegate->DoDelayedWork(&delayed_work_time_))
+    state_->more_work_is_plausible = true;
+  if (state_->should_quit) return;
+
+  // Don't do idle work if we think there are more important things
+  // that we could be doing.
+  if (state_->more_work_is_plausible) return;
+
+  if (state_->delegate->DoIdleWork()) state_->more_work_is_plausible = true;
+  if (state_->should_quit) return;
+}
+
+void MessagePumpForUI::Quit() {
+  if (state_) {
+    state_->should_quit = true;
+  } else {
+    NOTREACHED() << "Quit called outside Run!";
+  }
+}
+
+void MessagePumpForUI::ScheduleWork() {
+  // This can be called on any thread, so we don't want to touch any state
+  // variables as we would then need locks all over.  This ensures that if
+  // we are sleeping in a poll that we will wake up.
+  work_scheduled = true;
+  mozilla::NotifyEvent();
+}
+
+void MessagePumpForUI::ScheduleDelayedWork(const TimeTicks& delayed_work_time) {
+  // We need to wake up the loop in case the poll timeout needs to be
+  // adjusted.  This will cause us to try to do work, but that's ok.
+  delayed_work_time_ = delayed_work_time;
+  ScheduleWork();
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/message_pump_android.h b/ipc/chromium/src/base/message_pump_android.h
new file mode 100644
index 0000000000..8dd3fdac86
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_android.h
@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MESSAGE_PUMP_ANDROID_H_
+#define BASE_MESSAGE_PUMP_ANDROID_H_
+
+#include "base/message_pump.h"
+#include "base/time.h"
+
+namespace base {
+
+// This class implements a MessagePump needed for TYPE_UI MessageLoops on
+// Android
+class MessagePumpForUI : public MessagePump {
+ public:
+  MessagePumpForUI();
+  ~MessagePumpForUI();
+
+  virtual void Run(Delegate* delegate);
+  virtual void Quit();
+  virtual void ScheduleWork();
+  virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time);
+
+  // Internal methods used for processing the pump callbacks.  They are
+  // public for simplicity but should not be used directly.
+  // HandleDispatch is called after the poll has completed.
+  void HandleDispatch();
+
+ private:
+  // We may make recursive calls to Run, so we save state that needs to be
+  // separate between them in this structure type.
+  struct RunState {
+    Delegate* delegate;
+
+    // Used to flag that the current Run() invocation should return ASAP.
+    bool should_quit;
+
+    // Used to count how many Run() invocations are on the stack.
+    int run_depth;
+
+    // Used internally for controlling whether we want a message pump
+    // iteration to be blocking or not.
+    bool more_work_is_plausible;
+  };
+
+  RunState* state_;
+
+  // This is the time when we need to do delayed work.
+  TimeTicks delayed_work_time_;
+
+  bool work_scheduled;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpForUI);
+};
+
+}  // namespace base
+
+#endif  // BASE_MESSAGE_PUMP_ANDROID_H_
diff --git a/ipc/chromium/src/base/message_pump_default.cc b/ipc/chromium/src/base/message_pump_default.cc
new file mode 100644
index 0000000000..9db5789f1a
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_default.cc
@@ -0,0 +1,96 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/message_pump_default.h"
+
+#include "base/logging.h"
+#include "base/message_loop.h"
+#include "base/scoped_nsautorelease_pool.h"
+
+#include "mozilla/BackgroundHangMonitor.h"
+#include "mozilla/ProfilerLabels.h"
+#include "mozilla/ProfilerThreadSleep.h"
+
+namespace base {
+
+MessagePumpDefault::MessagePumpDefault()
+    : keep_running_(true), event_(false, false) {}
+
+void MessagePumpDefault::Run(Delegate* delegate) {
+  AUTO_PROFILER_LABEL("MessagePumpDefault::Run", OTHER);
+
+  DCHECK(keep_running_) << "Quit must have been called outside of Run!";
+
+  const MessageLoop* const loop = MessageLoop::current();
+  mozilla::BackgroundHangMonitor hangMonitor(loop->thread_name().c_str(),
+                                             loop->transient_hang_timeout(),
+                                             loop->permanent_hang_timeout());
+
+  for (;;) {
+    ScopedNSAutoreleasePool autorelease_pool;
+
+    hangMonitor.NotifyActivity();
+    bool did_work = delegate->DoWork();
+    if (!keep_running_) break;
+
+    hangMonitor.NotifyActivity();
+    did_work |= delegate->DoDelayedWork(&delayed_work_time_);
+    if (!keep_running_) break;
+
+    if (did_work) continue;
+
+    hangMonitor.NotifyActivity();
+    did_work = delegate->DoIdleWork();
+    if (!keep_running_) break;
+
+    if (did_work) continue;
+
+    if (delayed_work_time_.is_null()) {
+      hangMonitor.NotifyWait();
+      AUTO_PROFILER_LABEL("MessagePumpDefault::Run:Wait", IDLE);
+      {
+        AUTO_PROFILER_THREAD_SLEEP;
+        event_.Wait();
+      }
+    } else {
+      TimeDelta delay = delayed_work_time_ - TimeTicks::Now();
+      if (delay > TimeDelta()) {
+        hangMonitor.NotifyWait();
+        AUTO_PROFILER_LABEL("MessagePumpDefault::Run:Wait", IDLE);
+        {
+          AUTO_PROFILER_THREAD_SLEEP;
+          event_.TimedWait(delay);
+        }
+      } else {
+        // It looks like delayed_work_time_ indicates a time in the past, so we
+        // need to call DoDelayedWork now.
+        delayed_work_time_ = TimeTicks();
+      }
+    }
+    // Since event_ is auto-reset, we don't need to do anything special here
+    // other than service each delegate method.
+  }
+
+  keep_running_ = true;
+}
+
+void MessagePumpDefault::Quit() { keep_running_ = false; }
+
+void MessagePumpDefault::ScheduleWork() {
+  // Since this can be called on any thread, we need to ensure that our Run
+  // loop wakes up.
+  event_.Signal();
+}
+
+void MessagePumpDefault::ScheduleDelayedWork(
+    const TimeTicks& delayed_work_time) {
+  // We know that we can't be blocked on Wait right now since this method can
+  // only be called on the same thread as Run, so we only need to update our
+  // record of how long to sleep when we do sleep.
+  delayed_work_time_ = delayed_work_time;
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/message_pump_default.h b/ipc/chromium/src/base/message_pump_default.h
new file mode 100644
index 0000000000..99abaf6580
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_default.h
@@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MESSAGE_PUMP_DEFAULT_H_
+#define BASE_MESSAGE_PUMP_DEFAULT_H_
+
+#include "base/message_pump.h"
+#include "base/time.h"
+#include "base/waitable_event.h"
+
+namespace base {
+
+class MessagePumpDefault : public MessagePump {
+ public:
+  MessagePumpDefault();
+  ~MessagePumpDefault() {}
+
+  // MessagePump methods:
+  virtual void Run(Delegate* delegate) override;
+  virtual void Quit() override;
+  virtual void ScheduleWork() override;
+  virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time) override;
+
+ protected:
+  // This flag is set to false when Run should return.
+  bool keep_running_;
+
+  // Used to sleep until there is more work to do.
+  WaitableEvent event_;
+
+  // The time at which we should call DoDelayedWork.
+  TimeTicks delayed_work_time_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpDefault);
+};
+
+}  // namespace base
+
+#endif  // BASE_MESSAGE_PUMP_DEFAULT_H_
diff --git a/ipc/chromium/src/base/message_pump_glib.cc b/ipc/chromium/src/base/message_pump_glib.cc
new file mode 100644
index 0000000000..200740aefa
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_glib.cc
@@ -0,0 +1,325 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/message_pump_glib.h"
+
+#include <unistd.h>
+#include <math.h>
+
+#include <gtk/gtk.h>
+#include <glib.h>
+
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+#include "base/platform_thread.h"
+
+namespace {
+
+// Return a timeout suitable for the glib loop, -1 to block forever,
+// 0 to return right away, or a timeout in milliseconds from now.
+int GetTimeIntervalMilliseconds(const base::TimeTicks& from) {
+  if (from.is_null()) return -1;
+
+  // Be careful here.  TimeDelta has a precision of microseconds, but we want a
+  // value in milliseconds.  If there are 5.5ms left, should the delay be 5 or
+  // 6?  It should be 6 to avoid executing delayed work too early.
+  int delay =
+      static_cast<int>(ceil((from - base::TimeTicks::Now()).InMillisecondsF()));
+
+  // If this value is negative, then we need to run delayed work soon.
+  return delay < 0 ? 0 : delay;
+}
+
+// A brief refresher on GLib:
+//     GLib sources have four callbacks: Prepare, Check, Dispatch and Finalize.
+// On each iteration of the GLib pump, it calls each source's Prepare function.
+// This function should return TRUE if it wants GLib to call its Dispatch, and
+// FALSE otherwise.  It can also set a timeout in this case for the next time
+// Prepare should be called again (it may be called sooner).
+//     After the Prepare calls, GLib does a poll to check for events from the
+// system.  File descriptors can be attached to the sources.  The poll may block
+// if none of the Prepare calls returned TRUE.  It will block indefinitely, or
+// by the minimum time returned by a source in Prepare.
+//     After the poll, GLib calls Check for each source that returned FALSE
+// from Prepare.  The return value of Check has the same meaning as for Prepare,
+// making Check a second chance to tell GLib we are ready for Dispatch.
+//     Finally, GLib calls Dispatch for each source that is ready.  If Dispatch
+// returns FALSE, GLib will destroy the source.  Dispatch calls may be recursive
+// (i.e., you can call Run from them), but Prepare and Check cannot.
+//     Finalize is called when the source is destroyed.
+// NOTE: It is common for subsytems to want to process pending events while
+// doing intensive work, for example the flash plugin. They usually use the
+// following pattern (recommended by the GTK docs):
+// while (gtk_events_pending()) {
+//   gtk_main_iteration();
+// }
+//
+// gtk_events_pending just calls g_main_context_pending, which does the
+// following:
+// - Call prepare on all the sources.
+// - Do the poll with a timeout of 0 (not blocking).
+// - Call check on all the sources.
+// - *Does not* call dispatch on the sources.
+// - Return true if any of prepare() or check() returned true.
+//
+// gtk_main_iteration just calls g_main_context_iteration, which does the whole
+// thing, respecting the timeout for the poll (and block, although it is
+// expected not to if gtk_events_pending returned true), and call dispatch.
+//
+// Thus it is important to only return true from prepare or check if we
+// actually have events or work to do. We also need to make sure we keep
+// internal state consistent so that if prepare/check return true when called
+// from gtk_events_pending, they will still return true when called right
+// after, from gtk_main_iteration.
+//
+// For the GLib pump we try to follow the Windows UI pump model:
+// - Whenever we receive a wakeup event or the timer for delayed work expires,
+// we run DoWork and/or DoDelayedWork. That part will also run in the other
+// event pumps.
+// - We also run DoWork, DoDelayedWork, and possibly DoIdleWork in the main
+// loop, around event handling.
+
+struct WorkSource : public GSource {
+  base::MessagePumpForUI* pump;
+};
+
+gboolean WorkSourcePrepare(GSource* source, gint* timeout_ms) {
+  *timeout_ms = static_cast<WorkSource*>(source)->pump->HandlePrepare();
+  // We always return FALSE, so that our timeout is honored.  If we were
+  // to return TRUE, the timeout would be considered to be 0 and the poll
+  // would never block.  Once the poll is finished, Check will be called.
+  return FALSE;
+}
+
+gboolean WorkSourceCheck(GSource* source) {
+  // Only return TRUE if Dispatch should be called.
+  return static_cast<WorkSource*>(source)->pump->HandleCheck();
+}
+
+gboolean WorkSourceDispatch(GSource* source, GSourceFunc unused_func,
+                            gpointer unused_data) {
+  static_cast<WorkSource*>(source)->pump->HandleDispatch();
+  // Always return TRUE so our source stays registered.
+  return TRUE;
+}
+
+// I wish these could be const, but g_source_new wants non-const.
+GSourceFuncs WorkSourceFuncs = {WorkSourcePrepare, WorkSourceCheck,
+                                WorkSourceDispatch, NULL};
+
+}  // namespace
+
+namespace base {
+
+MessagePumpForUI::MessagePumpForUI()
+    : state_(NULL),
+      context_(g_main_context_default()),
+      wakeup_gpollfd_(new GPollFD),
+      pipe_full_(false) {
+  // Create our wakeup pipe, which is used to flag when work was scheduled.
+  int fds[2];
+  CHECK(pipe(fds) == 0);
+  wakeup_pipe_read_ = fds[0];
+  wakeup_pipe_write_ = fds[1];
+  wakeup_gpollfd_->fd = wakeup_pipe_read_;
+  wakeup_gpollfd_->events = G_IO_IN;
+
+  work_source_ = g_source_new(&WorkSourceFuncs, sizeof(WorkSource));
+  static_cast<WorkSource*>(work_source_)->pump = this;
+  g_source_add_poll(work_source_, wakeup_gpollfd_.get());
+  // Use a low priority so that we let other events in the queue go first.
+  g_source_set_priority(work_source_, G_PRIORITY_DEFAULT_IDLE);
+  // This is needed to allow Run calls inside Dispatch.
+  g_source_set_can_recurse(work_source_, TRUE);
+  g_source_attach(work_source_, context_);
+  gdk_event_handler_set(&EventDispatcher, this, NULL);
+}
+
+MessagePumpForUI::~MessagePumpForUI() {
+  gdk_event_handler_set(reinterpret_cast<GdkEventFunc>(gtk_main_do_event), this,
+                        NULL);
+  g_source_destroy(work_source_);
+  g_source_unref(work_source_);
+  close(wakeup_pipe_read_);
+  close(wakeup_pipe_write_);
+}
+
+void MessagePumpForUI::RunWithDispatcher(Delegate* delegate,
+                                         Dispatcher* dispatcher) {
+#ifndef NDEBUG
+  // Make sure we only run this on one thread.  GTK only has one message pump
+  // so we can only have one UI loop per process.
+  static PlatformThreadId thread_id = PlatformThread::CurrentId();
+  DCHECK(thread_id == PlatformThread::CurrentId())
+      << "Running MessagePumpForUI on two different threads; "
+         "this is unsupported by GLib!";
+#endif
+
+  RunState state;
+  state.delegate = delegate;
+  state.dispatcher = dispatcher;
+  state.should_quit = false;
+  state.run_depth = state_ ? state_->run_depth + 1 : 1;
+  state.has_work = false;
+
+  RunState* previous_state = state_;
+  state_ = &state;
+
+  // We really only do a single task for each iteration of the loop.  If we
+  // have done something, assume there is likely something more to do.  This
+  // will mean that we don't block on the message pump until there was nothing
+  // more to do.  We also set this to true to make sure not to block on the
+  // first iteration of the loop, so RunAllPending() works correctly.
+  bool more_work_is_plausible = true;
+
+  // We run our own loop instead of using g_main_loop_quit in one of the
+  // callbacks.  This is so we only quit our own loops, and we don't quit
+  // nested loops run by others.  TODO(deanm): Is this what we want?
+  for (;;) {
+    // Don't block if we think we have more work to do.
+    bool block = !more_work_is_plausible;
+
+    // g_main_context_iteration returns true if events have been dispatched.
+    more_work_is_plausible = g_main_context_iteration(context_, block);
+    if (state_->should_quit) break;
+
+    more_work_is_plausible |= state_->delegate->DoWork();
+    if (state_->should_quit) break;
+
+    more_work_is_plausible |=
+        state_->delegate->DoDelayedWork(&delayed_work_time_);
+    if (state_->should_quit) break;
+
+    if (more_work_is_plausible) continue;
+
+    more_work_is_plausible = state_->delegate->DoIdleWork();
+    if (state_->should_quit) break;
+  }
+
+  state_ = previous_state;
+}
+
+// Return the timeout we want passed to poll.
+int MessagePumpForUI::HandlePrepare() {
+  // We know we have work, but we haven't called HandleDispatch yet. Don't let
+  // the pump block so that we can do some processing.
+  if (state_ &&  // state_ may be null during tests.
+      state_->has_work)
+    return 0;
+
+  // We don't think we have work to do, but make sure not to block
+  // longer than the next time we need to run delayed work.
+  return GetTimeIntervalMilliseconds(delayed_work_time_);
+}
+
+bool MessagePumpForUI::HandleCheck() {
+  if (!state_)  // state_ may be null during tests.
+    return false;
+
+  // We should only ever have a single message on the wakeup pipe since we only
+  // write to the pipe when pipe_full_ is false. The glib poll will tell us
+  // whether there was data, so this read shouldn't block.
+  if (wakeup_gpollfd_->revents & G_IO_IN) {
+    pipe_full_ = false;
+
+    char msg;
+    if (HANDLE_EINTR(read(wakeup_pipe_read_, &msg, 1)) != 1 || msg != '!') {
+      NOTREACHED() << "Error reading from the wakeup pipe.";
+    }
+    // Since we ate the message, we need to record that we have more work,
+    // because HandleCheck() may be called without HandleDispatch being called
+    // afterwards.
+    state_->has_work = true;
+  }
+
+  if (state_->has_work) return true;
+
+  if (GetTimeIntervalMilliseconds(delayed_work_time_) == 0) {
+    // The timer has expired. That condition will stay true until we process
+    // that delayed work, so we don't need to record this differently.
+    return true;
+  }
+
+  return false;
+}
+
+void MessagePumpForUI::HandleDispatch() {
+  state_->has_work = false;
+  if (state_->delegate->DoWork()) {
+    // NOTE: on Windows at this point we would call ScheduleWork (see
+    // MessagePumpForUI::HandleWorkMessage in message_pump_win.cc). But here,
+    // instead of posting a message on the wakeup pipe, we can avoid the
+    // syscalls and just signal that we have more work.
+    state_->has_work = true;
+  }
+
+  if (state_->should_quit) return;
+
+  state_->delegate->DoDelayedWork(&delayed_work_time_);
+}
+
+void MessagePumpForUI::AddObserver(Observer* observer) {
+  observers_.AddObserver(observer);
+}
+
+void MessagePumpForUI::RemoveObserver(Observer* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void MessagePumpForUI::WillProcessEvent(GdkEvent* event) {
+  FOR_EACH_OBSERVER(Observer, observers_, WillProcessEvent(event));
+}
+
+void MessagePumpForUI::DidProcessEvent(GdkEvent* event) {
+  FOR_EACH_OBSERVER(Observer, observers_, DidProcessEvent(event));
+}
+
+void MessagePumpForUI::Quit() {
+  if (state_) {
+    state_->should_quit = true;
+  } else {
+    NOTREACHED() << "Quit called outside Run!";
+  }
+}
+
+void MessagePumpForUI::ScheduleWork() {
+  bool was_full = pipe_full_.exchange(true);
+  if (was_full) {
+    return;
+  }
+
+  // This can be called on any thread, so we don't want to touch any state
+  // variables as we would then need locks all over.  This ensures that if
+  // we are sleeping in a poll that we will wake up.
+  char msg = '!';
+  if (HANDLE_EINTR(write(wakeup_pipe_write_, &msg, 1)) != 1) {
+    NOTREACHED() << "Could not write to the UI message loop wakeup pipe!";
+  }
+}
+
+void MessagePumpForUI::ScheduleDelayedWork(const TimeTicks& delayed_work_time) {
+  // We need to wake up the loop in case the poll timeout needs to be
+  // adjusted.  This will cause us to try to do work, but that's ok.
+  delayed_work_time_ = delayed_work_time;
+  ScheduleWork();
+}
+
+// static
+void MessagePumpForUI::EventDispatcher(GdkEvent* event, gpointer data) {
+  MessagePumpForUI* message_pump = reinterpret_cast<MessagePumpForUI*>(data);
+
+  message_pump->WillProcessEvent(event);
+  if (message_pump->state_ &&  // state_ may be null during tests.
+      message_pump->state_->dispatcher) {
+    if (!message_pump->state_->dispatcher->Dispatch(event))
+      message_pump->state_->should_quit = true;
+  } else {
+    gtk_main_do_event(event);
+  }
+  message_pump->DidProcessEvent(event);
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/message_pump_glib.h b/ipc/chromium/src/base/message_pump_glib.h
new file mode 100644
index 0000000000..8f90aa7913
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_glib.h
@@ -0,0 +1,149 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MESSAGE_PUMP_GLIB_H_
+#define BASE_MESSAGE_PUMP_GLIB_H_
+
+#include "base/message_pump.h"
+#include "base/observer_list.h"
+#include "base/time.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/Atomics.h"
+
+typedef union _GdkEvent GdkEvent;
+typedef struct _GMainContext GMainContext;
+typedef struct _GPollFD GPollFD;
+typedef struct _GSource GSource;
+
+namespace base {
+
+// This class implements a MessagePump needed for TYPE_UI MessageLoops on
+// OS_LINUX platforms using GLib.
+class MessagePumpForUI : public MessagePump {
+ public:
+  // Observer is notified prior to a GdkEvent event being dispatched. As
+  // Observers are notified of every change, they have to be FAST!
+  class Observer {
+   public:
+    virtual ~Observer() {}
+
+    // This method is called before processing a message.
+    virtual void WillProcessEvent(GdkEvent* event) = 0;
+
+    // This method is called after processing a message.
+    virtual void DidProcessEvent(GdkEvent* event) = 0;
+  };
+
+  // Dispatcher is used during a nested invocation of Run to dispatch events.
+  // If Run is invoked with a non-NULL Dispatcher, MessageLoop does not
+  // dispatch events (or invoke gtk_main_do_event), rather every event is
+  // passed to Dispatcher's Dispatch method for dispatch. It is up to the
+  // Dispatcher to dispatch, or not, the event.
+  //
+  // The nested loop is exited by either posting a quit, or returning false
+  // from Dispatch.
+  class Dispatcher {
+   public:
+    virtual ~Dispatcher() {}
+    // Dispatches the event. If true is returned processing continues as
+    // normal. If false is returned, the nested loop exits immediately.
+    virtual bool Dispatch(GdkEvent* event) = 0;
+  };
+
+  MessagePumpForUI();
+  virtual ~MessagePumpForUI();
+
+  // Like MessagePump::Run, but GdkEvent objects are routed through dispatcher.
+  virtual void RunWithDispatcher(Delegate* delegate, Dispatcher* dispatcher);
+
+  virtual void Run(Delegate* delegate) override {
+    RunWithDispatcher(delegate, NULL);
+  }
+  virtual void Quit() override;
+  virtual void ScheduleWork() override;
+  virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time) override;
+
+  // Internal methods used for processing the pump callbacks.  They are
+  // public for simplicity but should not be used directly.  HandlePrepare
+  // is called during the prepare step of glib, and returns a timeout that
+  // will be passed to the poll. HandleCheck is called after the poll
+  // has completed, and returns whether or not HandleDispatch should be called.
+  // HandleDispatch is called if HandleCheck returned true.
+  int HandlePrepare();
+  bool HandleCheck();
+  void HandleDispatch();
+
+  // Adds an Observer, which will start receiving notifications immediately.
+  void AddObserver(Observer* observer);
+
+  // Removes an Observer.  It is safe to call this method while an Observer is
+  // receiving a notification callback.
+  void RemoveObserver(Observer* observer);
+
+ private:
+  // We may make recursive calls to Run, so we save state that needs to be
+  // separate between them in this structure type.
+  struct RunState {
+    Delegate* delegate;
+    Dispatcher* dispatcher;
+
+    // Used to flag that the current Run() invocation should return ASAP.
+    bool should_quit;
+
+    // Used to count how many Run() invocations are on the stack.
+    int run_depth;
+
+    // This keeps the state of whether the pump got signaled that there was new
+    // work to be done. Since we eat the message on the wake up pipe as soon as
+    // we get it, we keep that state here to stay consistent.
+    bool has_work;
+  };
+
+  // Invoked from EventDispatcher. Notifies all observers we're about to
+  // process an event.
+  void WillProcessEvent(GdkEvent* event);
+
+  // Invoked from EventDispatcher. Notifies all observers we processed an
+  // event.
+  void DidProcessEvent(GdkEvent* event);
+
+  // Callback prior to gdk dispatching an event.
+  static void EventDispatcher(GdkEvent* event, void* data);
+
+  RunState* state_;
+
+  // This is a GLib structure that we can add event sources to.  We use the
+  // default GLib context, which is the one to which all GTK events are
+  // dispatched.
+  GMainContext* context_;
+
+  // This is the time when we need to do delayed work.
+  TimeTicks delayed_work_time_;
+
+  // The work source.  It is shared by all calls to Run and destroyed when
+  // the message pump is destroyed.
+  GSource* work_source_;
+
+  // We use a wakeup pipe to make sure we'll get out of the glib polling phase
+  // when another thread has scheduled us to do some work.  There is a glib
+  // mechanism g_main_context_wakeup, but this won't guarantee that our event's
+  // Dispatch() will be called.
+  int wakeup_pipe_read_;
+  int wakeup_pipe_write_;
+  // Use an autoptr to avoid needing the definition of GPollFD in the header.
+  mozilla::UniquePtr<GPollFD> wakeup_gpollfd_;
+
+  mozilla::Atomic<bool> pipe_full_;
+
+  // List of observers.
+  ObserverList<Observer> observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpForUI);
+};
+
+}  // namespace base
+
+#endif  // BASE_MESSAGE_PUMP_GLIB_H_
diff --git a/ipc/chromium/src/base/message_pump_libevent.cc b/ipc/chromium/src/base/message_pump_libevent.cc
new file mode 100644
index 0000000000..c1f945bd4d
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_libevent.cc
@@ -0,0 +1,410 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/message_pump_libevent.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#if defined(ANDROID) || defined(OS_POSIX)
+#  include <unistd.h>
+#endif
+
+#include "eintr_wrapper.h"
+#include "base/logging.h"
+#include "base/scoped_nsautorelease_pool.h"
+#include "base/time.h"
+#include "event.h"
+#include "mozilla/ProfilerLabels.h"
+#include "mozilla/ProfilerThreadSleep.h"
+#include "mozilla/UniquePtr.h"
+
+// This macro checks that the _EVENT_SIZEOF_* constants defined in
+// ipc/chromiume/src/third_party/<platform>/event2/event-config.h are correct.
+#if defined(_EVENT_SIZEOF_SHORT)
+#  define CHECK_EVENT_SIZEOF(TYPE, type)                \
+    static_assert(_EVENT_SIZEOF_##TYPE == sizeof(type), \
+                  "bad _EVENT_SIZEOF_" #TYPE);
+#elif defined(EVENT__SIZEOF_SHORT)
+#  define CHECK_EVENT_SIZEOF(TYPE, type)                \
+    static_assert(EVENT__SIZEOF_##TYPE == sizeof(type), \
+                  "bad EVENT__SIZEOF_" #TYPE);
+#else
+#  error Cannot find libevent type sizes
+#endif
+
+CHECK_EVENT_SIZEOF(LONG, long);
+CHECK_EVENT_SIZEOF(LONG_LONG, long long);
+CHECK_EVENT_SIZEOF(OFF_T, ev_off_t);
+CHECK_EVENT_SIZEOF(PTHREAD_T, pthread_t);
+CHECK_EVENT_SIZEOF(SHORT, short);
+CHECK_EVENT_SIZEOF(SIZE_T, size_t);
+CHECK_EVENT_SIZEOF(TIME_T, time_t);
+CHECK_EVENT_SIZEOF(VOID_P, void*);
+
+// Lifecycle of struct event
+// Libevent uses two main data structures:
+// struct event_base (of which there is one per message pump), and
+// struct event (of which there is roughly one per socket).
+// The socket's struct event is created in
+// MessagePumpLibevent::WatchFileDescriptor(),
+// is owned by the FileDescriptorWatcher, and is destroyed in
+// StopWatchingFileDescriptor().
+// It is moved into and out of lists in struct event_base by
+// the libevent functions event_add() and event_del().
+//
+// TODO(dkegel):
+// At the moment bad things happen if a FileDescriptorWatcher
+// is active after its MessagePumpLibevent has been destroyed.
+// See MessageLoopTest.FileDescriptorWatcherOutlivesMessageLoop
+// Not clear yet whether that situation occurs in practice,
+// but if it does, we need to fix it.
+
+namespace base {
+
+// Return 0 on success
+// Too small a function to bother putting in a library?
+static int SetNonBlocking(int fd) {
+  int flags = fcntl(fd, F_GETFL, 0);
+  if (flags == -1) flags = 0;
+  return fcntl(fd, F_SETFL, flags | O_NONBLOCK);
+}
+
+MessagePumpLibevent::FileDescriptorWatcher::FileDescriptorWatcher()
+    : is_persistent_(false), event_(NULL) {}
+
+MessagePumpLibevent::FileDescriptorWatcher::~FileDescriptorWatcher() {
+  if (event_) {
+    StopWatchingFileDescriptor();
+  }
+}
+
+void MessagePumpLibevent::FileDescriptorWatcher::Init(event* e,
+                                                      bool is_persistent) {
+  DCHECK(e);
+  DCHECK(event_ == NULL);
+
+  is_persistent_ = is_persistent;
+  event_ = e;
+}
+
+event* MessagePumpLibevent::FileDescriptorWatcher::ReleaseEvent() {
+  struct event* e = event_;
+  event_ = NULL;
+  return e;
+}
+
+bool MessagePumpLibevent::FileDescriptorWatcher::StopWatchingFileDescriptor() {
+  event* e = ReleaseEvent();
+  if (e == NULL) return true;
+
+  // event_del() is a no-op if the event isn't active.
+  int rv = event_del(e);
+  delete e;
+  return (rv == 0);
+}
+
+bool MessagePumpLibevent::awake_ = false;
+
+// Called if a byte is received on the wakeup pipe.
+void MessagePumpLibevent::OnWakeup(int socket, short flags, void* context) {
+  if (!awake_) {
+    profiler_thread_wake();
+    awake_ = true;
+  }
+
+  AUTO_PROFILER_LABEL("MessagePumpLibevent::OnWakeup", OTHER);
+
+  base::MessagePumpLibevent* that =
+      static_cast<base::MessagePumpLibevent*>(context);
+  DCHECK(that->wakeup_pipe_out_ == socket);
+
+  // Remove and discard the wakeup byte.
+  char buf;
+  int nread = HANDLE_EINTR(read(socket, &buf, 1));
+  DCHECK_EQ(nread, 1);
+  // Tell libevent to break out of inner loop.
+  event_base_loopbreak(that->event_base_);
+}
+
+MessagePumpLibevent::MessagePumpLibevent()
+    : keep_running_(true),
+      in_run_(false),
+      event_base_(event_base_new()),
+      wakeup_pipe_in_(-1),
+      wakeup_pipe_out_(-1) {
+  if (!Init()) NOTREACHED();
+}
+
+bool MessagePumpLibevent::Init() {
+  int fds[2];
+  if (pipe(fds)) {
+    DLOG(ERROR) << "pipe() failed, errno: " << errno;
+    return false;
+  }
+  if (SetNonBlocking(fds[0])) {
+    DLOG(ERROR) << "SetNonBlocking for pipe fd[0] failed, errno: " << errno;
+    return false;
+  }
+  if (SetNonBlocking(fds[1])) {
+    DLOG(ERROR) << "SetNonBlocking for pipe fd[1] failed, errno: " << errno;
+    return false;
+  }
+  wakeup_pipe_out_ = fds[0];
+  wakeup_pipe_in_ = fds[1];
+
+  wakeup_event_ = new event;
+  event_set(wakeup_event_, wakeup_pipe_out_, EV_READ | EV_PERSIST, OnWakeup,
+            this);
+  event_base_set(event_base_, wakeup_event_);
+
+  if (event_add(wakeup_event_, 0)) return false;
+  return true;
+}
+
+MessagePumpLibevent::~MessagePumpLibevent() {
+  DCHECK(wakeup_event_);
+  DCHECK(event_base_);
+  event_del(wakeup_event_);
+  delete wakeup_event_;
+  if (wakeup_pipe_in_ >= 0) close(wakeup_pipe_in_);
+  if (wakeup_pipe_out_ >= 0) close(wakeup_pipe_out_);
+  event_base_free(event_base_);
+}
+
+bool MessagePumpLibevent::WatchFileDescriptor(int fd, bool persistent,
+                                              Mode mode,
+                                              FileDescriptorWatcher* controller,
+                                              Watcher* delegate) {
+  DCHECK(fd > 0);
+  DCHECK(controller);
+  DCHECK(delegate);
+  DCHECK(mode == WATCH_READ || mode == WATCH_WRITE || mode == WATCH_READ_WRITE);
+
+  int event_mask = persistent ? EV_PERSIST : 0;
+  if ((mode & WATCH_READ) != 0) {
+    event_mask |= EV_READ;
+  }
+  if ((mode & WATCH_WRITE) != 0) {
+    event_mask |= EV_WRITE;
+  }
+
+  // |should_delete_event| is true if we're modifying an event that's currently
+  // active in |controller|.
+  // If we're modifying an existing event and there's an error then we need to
+  // tell libevent to clean it up via event_delete() before returning.
+  bool should_delete_event = true;
+  mozilla::UniquePtr<event> evt(controller->ReleaseEvent());
+  if (evt.get() == NULL) {
+    should_delete_event = false;
+    // Ownership is transferred to the controller.
+    evt = mozilla::MakeUnique<event>();
+  } else {
+    // It's illegal to use this function to listen on 2 separate fds with the
+    // same |controller|.
+    if (EVENT_FD(evt.get()) != fd) {
+      NOTREACHED() << "FDs don't match" << EVENT_FD(evt.get()) << "!=" << fd;
+      return false;
+    }
+
+    // Make sure we don't pick up any funky internal libevent masks.
+    int old_interest_mask =
+        evt.get()->ev_events & (EV_READ | EV_WRITE | EV_PERSIST);
+
+    // Combine old/new event masks.
+    event_mask |= old_interest_mask;
+
+    // Must disarm the event before we can reuse it.
+    event_del(evt.get());
+  }
+
+  // Set current interest mask and message pump for this event.
+  event_set(evt.get(), fd, event_mask, OnLibeventNotification, delegate);
+
+  // Tell libevent which message pump this socket will belong to when we add it.
+  if (event_base_set(event_base_, evt.get()) != 0) {
+    if (should_delete_event) {
+      event_del(evt.get());
+    }
+    return false;
+  }
+
+  // Add this socket to the list of monitored sockets.
+  if (event_add(evt.get(), NULL) != 0) {
+    if (should_delete_event) {
+      event_del(evt.get());
+    }
+    return false;
+  }
+
+  // Transfer ownership of evt to controller.
+  controller->Init(evt.release(), persistent);
+  return true;
+}
+
+void MessagePumpLibevent::OnLibeventNotification(int fd, short flags,
+                                                 void* context) {
+  if (!awake_) {
+    profiler_thread_wake();
+    awake_ = true;
+  }
+  AUTO_PROFILER_LABEL("MessagePumpLibevent::OnLibeventNotification", OTHER);
+
+  Watcher* watcher = static_cast<Watcher*>(context);
+
+  if (flags & EV_WRITE) {
+    watcher->OnFileCanWriteWithoutBlocking(fd);
+  }
+  if (flags & EV_READ) {
+    watcher->OnFileCanReadWithoutBlocking(fd);
+  }
+}
+
+MessagePumpLibevent::SignalEvent::SignalEvent() : event_(NULL) {}
+
+MessagePumpLibevent::SignalEvent::~SignalEvent() {
+  if (event_) {
+    StopCatching();
+  }
+}
+
+void MessagePumpLibevent::SignalEvent::Init(event* e) {
+  DCHECK(e);
+  DCHECK(event_ == NULL);
+  event_ = e;
+}
+
+bool MessagePumpLibevent::SignalEvent::StopCatching() {
+  // XXX/cjones: this code could be shared with
+  // FileDescriptorWatcher. ironic that libevent is "more"
+  // object-oriented than this C++
+  event* e = ReleaseEvent();
+  if (e == NULL) return true;
+
+  // event_del() is a no-op if the event isn't active.
+  int rv = event_del(e);
+  delete e;
+  return (rv == 0);
+}
+
+event* MessagePumpLibevent::SignalEvent::ReleaseEvent() {
+  event* e = event_;
+  event_ = NULL;
+  return e;
+}
+
+bool MessagePumpLibevent::CatchSignal(int sig, SignalEvent* sigevent,
+                                      SignalWatcher* delegate) {
+  DCHECK(sig > 0);
+  DCHECK(sigevent);
+  DCHECK(delegate);
+  // TODO if we want to support re-using SignalEvents, this code needs
+  // to jump through the same hoops as WatchFileDescriptor().  Not
+  // needed at present
+  DCHECK(NULL == sigevent->event_);
+
+  mozilla::UniquePtr<event> evt = mozilla::MakeUnique<event>();
+  signal_set(evt.get(), sig, OnLibeventSignalNotification, delegate);
+
+  if (event_base_set(event_base_, evt.get())) return false;
+
+  if (signal_add(evt.get(), NULL)) return false;
+
+  // Transfer ownership of evt to controller.
+  sigevent->Init(evt.release());
+  return true;
+}
+
+void MessagePumpLibevent::OnLibeventSignalNotification(int sig, short flags,
+                                                       void* context) {
+  if (!awake_) {
+    profiler_thread_wake();
+    awake_ = true;
+  }
+  AUTO_PROFILER_LABEL("MessagePumpLibevent::OnLibeventSignalNotification",
+                      OTHER);
+
+  DCHECK(sig > 0);
+  DCHECK(EV_SIGNAL == flags);
+  DCHECK(context);
+  reinterpret_cast<SignalWatcher*>(context)->OnSignal(sig);
+}
+
+// Reentrant!
+void MessagePumpLibevent::Run(Delegate* delegate) {
+  DCHECK(keep_running_) << "Quit must have been called outside of Run!";
+
+  bool old_in_run = in_run_;
+  in_run_ = true;
+
+  for (;;) {
+    ScopedNSAutoreleasePool autorelease_pool;
+
+    bool did_work = delegate->DoWork();
+    if (!keep_running_) break;
+
+    did_work |= delegate->DoDelayedWork(&delayed_work_time_);
+    if (!keep_running_) break;
+
+    if (did_work) continue;
+
+    did_work = delegate->DoIdleWork();
+    if (!keep_running_) break;
+
+    if (did_work) continue;
+
+    // EVLOOP_ONCE tells libevent to only block once,
+    // but to service all pending events when it wakes up.
+    AUTO_PROFILER_LABEL("MessagePumpLibevent::Run::Wait", IDLE);
+    if (delayed_work_time_.is_null()) {
+      profiler_thread_sleep();
+      awake_ = false;
+      event_base_loop(event_base_, EVLOOP_ONCE);
+    } else {
+      TimeDelta delay = delayed_work_time_ - TimeTicks::Now();
+      if (delay > TimeDelta()) {
+        struct timeval poll_tv;
+        poll_tv.tv_sec = delay.InSeconds();
+        poll_tv.tv_usec = delay.InMicroseconds() % Time::kMicrosecondsPerSecond;
+        event_base_loopexit(event_base_, &poll_tv);
+        profiler_thread_sleep();
+        awake_ = false;
+        event_base_loop(event_base_, EVLOOP_ONCE);
+      } else {
+        // It looks like delayed_work_time_ indicates a time in the past, so we
+        // need to call DoDelayedWork now.
+        delayed_work_time_ = TimeTicks();
+      }
+    }
+  }
+
+  keep_running_ = true;
+  in_run_ = old_in_run;
+}
+
+void MessagePumpLibevent::Quit() {
+  DCHECK(in_run_);
+  // Tell both libevent and Run that they should break out of their loops.
+  keep_running_ = false;
+  ScheduleWork();
+}
+
+void MessagePumpLibevent::ScheduleWork() {
+  // Tell libevent (in a threadsafe way) that it should break out of its loop.
+  char buf = 0;
+  int nwrite = HANDLE_EINTR(write(wakeup_pipe_in_, &buf, 1));
+  DCHECK(nwrite == 1 || errno == EAGAIN)
+      << "[nwrite:" << nwrite << "] [errno:" << errno << "]";
+}
+
+void MessagePumpLibevent::ScheduleDelayedWork(
+    const TimeTicks& delayed_work_time) {
+  // We know that we can't be blocked on Wait right now since this method can
+  // only be called on the same thread as Run, so we only need to update our
+  // record of how long to sleep when we do sleep.
+  delayed_work_time_ = delayed_work_time;
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/message_pump_libevent.h b/ipc/chromium/src/base/message_pump_libevent.h
new file mode 100644
index 0000000000..b1a7d474b3
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_libevent.h
@@ -0,0 +1,181 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MESSAGE_PUMP_LIBEVENT_H_
+#define BASE_MESSAGE_PUMP_LIBEVENT_H_
+
+#include "base/message_pump.h"
+#include "base/time.h"
+
+// Declare structs we need from libevent.h rather than including it
+struct event_base;
+struct event;
+
+namespace base {
+
+// Class to monitor sockets and issue callbacks when sockets are ready for I/O
+// TODO(dkegel): add support for background file IO somehow
+class MessagePumpLibevent : public MessagePump {
+ public:
+  // Object returned by WatchFileDescriptor to manage further watching.
+  class FileDescriptorWatcher {
+   public:
+    FileDescriptorWatcher();
+    ~FileDescriptorWatcher();  // Implicitly calls StopWatchingFileDescriptor.
+
+    // NOTE: These methods aren't called StartWatching()/StopWatching() to
+    // avoid confusion with the win32 ObjectWatcher class.
+
+    // Stop watching the FD, always safe to call.  No-op if there's nothing
+    // to do.
+    bool StopWatchingFileDescriptor();
+
+   private:
+    // Called by MessagePumpLibevent, ownership of |e| is transferred to this
+    // object.
+    void Init(event* e, bool is_persistent);
+
+    // Used by MessagePumpLibevent to take ownership of event_.
+    event* ReleaseEvent();
+    friend class MessagePumpLibevent;
+
+   private:
+    bool is_persistent_;  // false if this event is one-shot.
+    event* event_;
+    DISALLOW_COPY_AND_ASSIGN(FileDescriptorWatcher);
+  };
+
+  // Used with WatchFileDescptor to asynchronously monitor the I/O readiness of
+  // a File Descriptor.
+  class Watcher {
+   public:
+    virtual ~Watcher() {}
+    // Called from MessageLoop::Run when an FD can be read from/written to
+    // without blocking
+    virtual void OnFileCanReadWithoutBlocking(int fd) = 0;
+    virtual void OnFileCanWriteWithoutBlocking(int fd) = 0;
+  };
+
+  MessagePumpLibevent();
+
+  enum Mode {
+    WATCH_READ = 1 << 0,
+    WATCH_WRITE = 1 << 1,
+    WATCH_READ_WRITE = WATCH_READ | WATCH_WRITE
+  };
+
+  // Have the current thread's message loop watch for a a situation in which
+  // reading/writing to the FD can be performed without Blocking.
+  // Callers must provide a preallocated FileDescriptorWatcher object which
+  // can later be used to manage the Lifetime of this event.
+  // If a FileDescriptorWatcher is passed in which is already attached to
+  // an event, then the effect is cumulative i.e. after the call |controller|
+  // will watch both the previous event and the new one.
+  // If an error occurs while calling this method in a cumulative fashion, the
+  // event previously attached to |controller| is aborted.
+  // Returns true on success.
+  // TODO(dkegel): switch to edge-triggered readiness notification
+  bool WatchFileDescriptor(int fd, bool persistent, Mode mode,
+                           FileDescriptorWatcher* controller,
+                           Watcher* delegate);
+
+  // This is analagous to FileDescriptorWatcher above, which really is
+  // just a wrapper around libevent's |struct event|.  This class acts
+  // as a sort of "scoped event watcher" in that it guarantees that
+  // when this class is out of scope, the signal-event it wraps is
+  // removed from libevent's guts.
+  //
+  // XXX/cjones: this isn't my favorite API, but preserving it in
+  // order to match code above
+  class SignalEvent {
+    friend class MessagePumpLibevent;
+
+   public:
+    SignalEvent();
+    ~SignalEvent();  // implicitly calls StopCatching()
+
+    // Have libevent forget this event.
+    bool StopCatching();
+
+   private:
+    void Init(event* e);
+    event* ReleaseEvent();
+
+    event* event_;
+
+    DISALLOW_COPY_AND_ASSIGN(SignalEvent);
+  };
+
+  class SignalWatcher {
+   public:
+    virtual ~SignalWatcher() {}
+    // Called from MessageLoop::Run when |sig| has been delivered to
+    // this process
+    virtual void OnSignal(int sig) = 0;
+  };
+
+  // Have the current thread's message loop catch the signal |sig|.
+  // Multiple watchers can catch the same signal; they're all notified
+  // upon its delivery.  Callers must provide a preallocated
+  // SignalEvent object which can be used to manage the lifetime of
+  // this event.  Returns true on success.
+  bool CatchSignal(int sig, SignalEvent* sigevent, SignalWatcher* delegate);
+
+  // MessagePump methods:
+  virtual void Run(Delegate* delegate) override;
+  virtual void Quit() override;
+  virtual void ScheduleWork() override;
+  virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time) override;
+
+ protected:
+  virtual ~MessagePumpLibevent();
+
+ private:
+  // Risky part of constructor.  Returns true on success.
+  bool Init();
+
+  // This flag is set to false when Run should return.
+  bool keep_running_;
+
+  // This flag is set when inside Run.
+  bool in_run_;
+
+  // The time at which we should call DoDelayedWork.
+  TimeTicks delayed_work_time_;
+
+  // Libevent dispatcher.  Watches all sockets registered with it, and sends
+  // readiness callbacks when a socket is ready for I/O.
+  event_base* event_base_;
+
+  // Called by libevent to tell us a registered FD can be read/written to.
+  static void OnLibeventNotification(int fd, short flags, void* context);
+
+  // Called by libevent upon receiving a signal
+  static void OnLibeventSignalNotification(int sig, short flags, void* context);
+
+  // Unix pipe used to implement ScheduleWork()
+  // ... callback; called by libevent inside Run() when pipe is ready to read
+  static void OnWakeup(int socket, short flags, void* context);
+  // ... write end; ScheduleWork() writes a single byte to it
+  int wakeup_pipe_in_;
+  // ... read end; OnWakeup reads it and then breaks Run() out of its sleep
+  int wakeup_pipe_out_;
+  // ... libevent wrapper for read end
+  event* wakeup_event_;
+
+  // Set to false when calling event_base_loop and to true when either of the
+  // OnWakeup, OnLibeventNotification or OnLibeventSignalNotification callbacks
+  // is called.
+  // Used to ensure our calls to profiler_thread_sleep and profiler_thread_wake
+  // are paired correctly.
+  static bool awake_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpLibevent);
+};
+
+}  // namespace base
+
+#endif  // BASE_MESSAGE_PUMP_LIBEVENT_H_
diff --git a/ipc/chromium/src/base/message_pump_mac.h b/ipc/chromium/src/base/message_pump_mac.h
new file mode 100644
index 0000000000..13902bbf3e
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_mac.h
@@ -0,0 +1,280 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// The basis for all native run loops on the Mac is the CFRunLoop.  It can be
+// used directly, it can be used as the driving force behind the similar
+// Foundation NSRunLoop, and it can be used to implement higher-level event
+// loops such as the NSApplication event loop.
+//
+// This file introduces a basic CFRunLoop-based implementation of the
+// MessagePump interface called CFRunLoopBase.  CFRunLoopBase contains all
+// of the machinery necessary to dispatch events to a delegate, but does not
+// implement the specific run loop.  Concrete subclasses must provide their
+// own DoRun and Quit implementations.
+//
+// A concrete subclass that just runs a CFRunLoop loop is provided in
+// MessagePumpCFRunLoop.  For an NSRunLoop, the similar MessagePumpNSRunLoop
+// is provided.
+//
+// For the application's event loop, an implementation based on AppKit's
+// NSApplication event system is provided in MessagePumpNSApplication.
+//
+// Typically, MessagePumpNSApplication only makes sense on a Cocoa
+// application's main thread.  If a CFRunLoop-based message pump is needed on
+// any other thread, one of the other concrete subclasses is preferrable.
+// MessagePumpMac::Create is defined, which returns a new NSApplication-based
+// or NSRunLoop-based MessagePump subclass depending on which thread it is
+// called on.
+
+#ifndef BASE_MESSAGE_PUMP_MAC_H_
+#define BASE_MESSAGE_PUMP_MAC_H_
+
+#include "base/message_pump.h"
+
+#include "base/basictypes.h"
+
+#include <CoreFoundation/CoreFoundation.h>
+#include <IOKit/IOKitLib.h>
+
+#if defined(__OBJC__)
+@class NSAutoreleasePool;
+#else   // defined(__OBJC__)
+class NSAutoreleasePool;
+#endif  // defined(__OBJC__)
+
+namespace base {
+
+class TimeTicks;
+
+class MessagePumpCFRunLoopBase : public MessagePump {
+  // Needs access to CreateAutoreleasePool.
+  friend class MessagePumpScopedAutoreleasePool;
+
+ public:
+  MessagePumpCFRunLoopBase();
+  virtual ~MessagePumpCFRunLoopBase();
+
+  // Subclasses should implement the work they need to do in MessagePump::Run
+  // in the DoRun method.  MessagePumpCFRunLoopBase::Run calls DoRun directly.
+  // This arrangement is used because MessagePumpCFRunLoopBase needs to set
+  // up and tear down things before and after the "meat" of DoRun.
+  virtual void Run(Delegate* delegate);
+  virtual void DoRun(Delegate* delegate) = 0;
+
+  virtual void ScheduleWork();
+  virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time);
+
+ protected:
+  // Accessors for private data members to be used by subclasses.
+  CFRunLoopRef run_loop() const { return run_loop_; }
+  int nesting_level() const { return nesting_level_; }
+  int run_nesting_level() const { return run_nesting_level_; }
+
+  // Return an autorelease pool to wrap around any work being performed.
+  // In some cases, CreateAutoreleasePool may return nil intentionally to
+  // preventing an autorelease pool from being created, allowing any
+  // objects autoreleased by work to fall into the current autorelease pool.
+  virtual NSAutoreleasePool* CreateAutoreleasePool();
+
+ private:
+  // Timer callback scheduled by ScheduleDelayedWork.  This does not do any
+  // work, but it signals delayed_work_source_ so that delayed work can be
+  // performed within the appropriate priority constraints.
+  static void RunDelayedWorkTimer(CFRunLoopTimerRef timer, void* info);
+
+  // Perform highest-priority work.  This is associated with work_source_
+  // signalled by ScheduleWork.  The static method calls the instance method;
+  // the instance method returns true if work was done.
+  static void RunWorkSource(void* info);
+  bool RunWork();
+
+  // Perform delayed-priority work.  This is associated with
+  // delayed_work_source_ signalled by RunDelayedWorkTimer, and is responsible
+  // for calling ScheduleDelayedWork again if appropriate.  The static method
+  // calls the instance method; the instance method returns true if more
+  // delayed work is available.
+  static void RunDelayedWorkSource(void* info);
+  bool RunDelayedWork();
+
+  // Perform idle-priority work.  This is normally called by PreWaitObserver,
+  // but is also associated with idle_work_source_.  When this function
+  // actually does perform idle work, it will resignal that source.  The
+  // static method calls the instance method; the instance method returns
+  // true if idle work was done.
+  static void RunIdleWorkSource(void* info);
+  bool RunIdleWork();
+
+  // Perform work that may have been deferred because it was not runnable
+  // within a nested run loop.  This is associated with
+  // nesting_deferred_work_source_ and is signalled by
+  // MaybeScheduleNestingDeferredWork when returning from a nested loop,
+  // so that an outer loop will be able to perform the necessary tasks if it
+  // permits nestable tasks.
+  static void RunNestingDeferredWorkSource(void* info);
+  bool RunNestingDeferredWork();
+
+  // Schedules possible nesting-deferred work to be processed before the run
+  // loop goes to sleep, exits, or begins processing sources at the top of its
+  // loop.  If this function detects that a nested loop had run since the
+  // previous attempt to schedule nesting-deferred work, it will schedule a
+  // call to RunNestingDeferredWorkSource.
+  void MaybeScheduleNestingDeferredWork();
+
+  // Observer callback responsible for performing idle-priority work, before
+  // the run loop goes to sleep.  Associated with idle_work_observer_.
+  static void PreWaitObserver(CFRunLoopObserverRef observer,
+                              CFRunLoopActivity activity, void* info);
+
+  // Observer callback called before the run loop processes any sources.
+  // Associated with pre_source_observer_.
+  static void PreSourceObserver(CFRunLoopObserverRef observer,
+                                CFRunLoopActivity activity, void* info);
+
+  // Observer callback called when the run loop starts and stops, at the
+  // beginning and end of calls to CFRunLoopRun.  This is used to maintain
+  // nesting_level_.  Associated with enter_exit_observer_.
+  static void EnterExitObserver(CFRunLoopObserverRef observer,
+                                CFRunLoopActivity activity, void* info);
+
+  // Called by EnterExitObserver after performing maintenance on nesting_level_.
+  // This allows subclasses an opportunity to perform additional processing on
+  // the basis of run loops starting and stopping.
+  virtual void EnterExitRunLoop(CFRunLoopActivity activity);
+
+  // IOKit power state change notification callback, called when the system
+  // enters and leaves the sleep state.
+  static void PowerStateNotification(void* info, io_service_t service,
+                                     uint32_t message_type,
+                                     void* message_argument);
+
+  // The thread's run loop.
+  CFRunLoopRef run_loop_;
+
+  // The timer, sources, and observers are described above alongside their
+  // callbacks.
+  CFRunLoopTimerRef delayed_work_timer_;
+  CFRunLoopSourceRef work_source_;
+  CFRunLoopSourceRef delayed_work_source_;
+  CFRunLoopSourceRef idle_work_source_;
+  CFRunLoopSourceRef nesting_deferred_work_source_;
+  CFRunLoopObserverRef pre_wait_observer_;
+  CFRunLoopObserverRef pre_source_observer_;
+  CFRunLoopObserverRef enter_exit_observer_;
+
+  // Objects used for power state notification.  See PowerStateNotification.
+  io_connect_t root_power_domain_;
+  IONotificationPortRef power_notification_port_;
+  io_object_t power_notification_object_;
+
+  // (weak) Delegate passed as an argument to the innermost Run call.
+  Delegate* delegate_;
+
+  // The time that delayed_work_timer_ is scheduled to fire.  This is tracked
+  // independently of CFRunLoopTimerGetNextFireDate(delayed_work_timer_)
+  // to be able to reset the timer properly after waking from system sleep.
+  // See PowerStateNotification.
+  CFAbsoluteTime delayed_work_fire_time_;
+
+  // The recursion depth of the currently-executing CFRunLoopRun loop on the
+  // run loop's thread.  0 if no run loops are running inside of whatever scope
+  // the object was created in.
+  int nesting_level_;
+
+  // The recursion depth (calculated in the same way as nesting_level_) of the
+  // innermost executing CFRunLoopRun loop started by a call to Run.
+  int run_nesting_level_;
+
+  // The deepest (numerically highest) recursion depth encountered since the
+  // most recent attempt to run nesting-deferred work.
+  int deepest_nesting_level_;
+
+  // "Delegateless" work flags are set when work is ready to be performed but
+  // must wait until a delegate is available to process it.  This can happen
+  // when a MessagePumpCFRunLoopBase is instantiated and work arrives without
+  // any call to Run on the stack.  The Run method will check for delegateless
+  // work on entry and redispatch it as needed once a delegate is available.
+  bool delegateless_work_;
+  bool delegateless_delayed_work_;
+  bool delegateless_idle_work_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpCFRunLoopBase);
+};
+
+class MessagePumpCFRunLoop : public MessagePumpCFRunLoopBase {
+ public:
+  MessagePumpCFRunLoop();
+
+  virtual void DoRun(Delegate* delegate);
+  virtual void Quit();
+
+ private:
+  virtual void EnterExitRunLoop(CFRunLoopActivity activity);
+
+  // True if Quit is called to stop the innermost MessagePump
+  // (innermost_quittable_) but some other CFRunLoopRun loop (nesting_level_)
+  // is running inside the MessagePump's innermost Run call.
+  bool quit_pending_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpCFRunLoop);
+};
+
+class MessagePumpNSRunLoop : public MessagePumpCFRunLoopBase {
+ public:
+  MessagePumpNSRunLoop();
+  virtual ~MessagePumpNSRunLoop();
+
+  virtual void DoRun(Delegate* delegate);
+  virtual void Quit();
+
+ private:
+  // A source that doesn't do anything but provide something signalable
+  // attached to the run loop.  This source will be signalled when Quit
+  // is called, to cause the loop to wake up so that it can stop.
+  CFRunLoopSourceRef quit_source_;
+
+  // False after Quit is called.
+  bool keep_running_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpNSRunLoop);
+};
+
+class MessagePumpNSApplication : public MessagePumpCFRunLoopBase {
+ public:
+  MessagePumpNSApplication();
+
+  virtual void DoRun(Delegate* delegate);
+  virtual void Quit();
+
+ protected:
+  // Returns nil if NSApp is currently in the middle of calling -sendEvent.
+  virtual NSAutoreleasePool* CreateAutoreleasePool();
+
+ private:
+  // False after Quit is called.
+  bool keep_running_;
+
+  // True if DoRun is managing its own run loop as opposed to letting
+  // -[NSApplication run] handle it.  The outermost run loop in the application
+  // is managed by -[NSApplication run], inner run loops are handled by a loop
+  // in DoRun.
+  bool running_own_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpNSApplication);
+};
+
+class MessagePumpMac {
+ public:
+  // Returns a new instance of MessagePumpNSApplication if called on the main
+  // thread.  Otherwise, returns a new instance of MessagePumpNSRunLoop.
+  static MessagePump* Create();
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(MessagePumpMac);
+};
+
+}  // namespace base
+
+#endif  // BASE_MESSAGE_PUMP_MAC_H_
diff --git a/ipc/chromium/src/base/message_pump_mac.mm b/ipc/chromium/src/base/message_pump_mac.mm
new file mode 100644
index 0000000000..db6a714052
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_mac.mm
@@ -0,0 +1,712 @@
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/message_pump_mac.h"
+
+#import <AppKit/AppKit.h>
+#import <Foundation/Foundation.h>
+#include <IOKit/IOMessage.h>
+#include <IOKit/pwr_mgt/IOPMLib.h>
+
+#include <limits>
+
+#import "base/chrome_application_mac.h"
+#include "base/logging.h"
+#include "base/time.h"
+
+namespace {
+
+void NoOp(void* info) {}
+
+const CFTimeInterval kCFTimeIntervalMax = std::numeric_limits<CFTimeInterval>::max();
+
+}  // namespace
+
+namespace base {
+
+// A scoper for autorelease pools created from message pump run loops.
+// Avoids dirtying up the ScopedNSAutoreleasePool interface for the rare
+// case where an autorelease pool needs to be passed in.
+class MessagePumpScopedAutoreleasePool {
+ public:
+  explicit MessagePumpScopedAutoreleasePool(MessagePumpCFRunLoopBase* pump)
+      : pool_(pump->CreateAutoreleasePool()) {}
+  ~MessagePumpScopedAutoreleasePool() { [pool_ drain]; }
+
+ private:
+  NSAutoreleasePool* pool_;
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpScopedAutoreleasePool);
+};
+
+// Must be called on the run loop thread.
+MessagePumpCFRunLoopBase::MessagePumpCFRunLoopBase()
+    : delegate_(NULL),
+      delayed_work_fire_time_(kCFTimeIntervalMax),
+      nesting_level_(0),
+      run_nesting_level_(0),
+      deepest_nesting_level_(0),
+      delegateless_work_(false),
+      delegateless_delayed_work_(false),
+      delegateless_idle_work_(false) {
+  run_loop_ = CFRunLoopGetCurrent();
+  CFRetain(run_loop_);
+
+  // Set a repeating timer with a preposterous firing time and interval.  The
+  // timer will effectively never fire as-is.  The firing time will be adjusted
+  // as needed when ScheduleDelayedWork is called.
+  CFRunLoopTimerContext timer_context = CFRunLoopTimerContext();
+  timer_context.info = this;
+  delayed_work_timer_ = CFRunLoopTimerCreate(NULL,                // allocator
+                                             kCFTimeIntervalMax,  // fire time
+                                             kCFTimeIntervalMax,  // interval
+                                             0,                   // flags
+                                             0,                   // priority
+                                             RunDelayedWorkTimer, &timer_context);
+  CFRunLoopAddTimer(run_loop_, delayed_work_timer_, kCFRunLoopCommonModes);
+
+  CFRunLoopSourceContext source_context = CFRunLoopSourceContext();
+  source_context.info = this;
+  source_context.perform = RunWorkSource;
+  work_source_ = CFRunLoopSourceCreate(NULL,  // allocator
+                                       1,     // priority
+                                       &source_context);
+  CFRunLoopAddSource(run_loop_, work_source_, kCFRunLoopCommonModes);
+
+  source_context.perform = RunDelayedWorkSource;
+  delayed_work_source_ = CFRunLoopSourceCreate(NULL,  // allocator
+                                               2,     // priority
+                                               &source_context);
+  CFRunLoopAddSource(run_loop_, delayed_work_source_, kCFRunLoopCommonModes);
+
+  source_context.perform = RunIdleWorkSource;
+  idle_work_source_ = CFRunLoopSourceCreate(NULL,  // allocator
+                                            3,     // priority
+                                            &source_context);
+  CFRunLoopAddSource(run_loop_, idle_work_source_, kCFRunLoopCommonModes);
+
+  source_context.perform = RunNestingDeferredWorkSource;
+  nesting_deferred_work_source_ = CFRunLoopSourceCreate(NULL,  // allocator
+                                                        0,     // priority
+                                                        &source_context);
+  CFRunLoopAddSource(run_loop_, nesting_deferred_work_source_, kCFRunLoopCommonModes);
+
+  CFRunLoopObserverContext observer_context = CFRunLoopObserverContext();
+  observer_context.info = this;
+  pre_wait_observer_ = CFRunLoopObserverCreate(NULL,  // allocator
+                                               kCFRunLoopBeforeWaiting,
+                                               true,  // repeat
+                                               0,     // priority
+                                               PreWaitObserver, &observer_context);
+  CFRunLoopAddObserver(run_loop_, pre_wait_observer_, kCFRunLoopCommonModes);
+
+  pre_source_observer_ = CFRunLoopObserverCreate(NULL,  // allocator
+                                                 kCFRunLoopBeforeSources,
+                                                 true,  // repeat
+                                                 0,     // priority
+                                                 PreSourceObserver, &observer_context);
+  CFRunLoopAddObserver(run_loop_, pre_source_observer_, kCFRunLoopCommonModes);
+
+  enter_exit_observer_ = CFRunLoopObserverCreate(NULL,  // allocator
+                                                 kCFRunLoopEntry | kCFRunLoopExit,
+                                                 true,  // repeat
+                                                 0,     // priority
+                                                 EnterExitObserver, &observer_context);
+  CFRunLoopAddObserver(run_loop_, enter_exit_observer_, kCFRunLoopCommonModes);
+
+  root_power_domain_ = IORegisterForSystemPower(
+      this, &power_notification_port_, PowerStateNotification, &power_notification_object_);
+  if (root_power_domain_ != MACH_PORT_NULL) {
+    CFRunLoopAddSource(run_loop_, IONotificationPortGetRunLoopSource(power_notification_port_),
+                       kCFRunLoopCommonModes);
+  }
+}
+
+// Ideally called on the run loop thread.  If other run loops were running
+// lower on the run loop thread's stack when this object was created, the
+// same number of run loops must be running when this object is destroyed.
+MessagePumpCFRunLoopBase::~MessagePumpCFRunLoopBase() {
+  if (root_power_domain_ != MACH_PORT_NULL) {
+    CFRunLoopRemoveSource(run_loop_, IONotificationPortGetRunLoopSource(power_notification_port_),
+                          kCFRunLoopCommonModes);
+    IODeregisterForSystemPower(&power_notification_object_);
+    IOServiceClose(root_power_domain_);
+    IONotificationPortDestroy(power_notification_port_);
+  }
+
+  CFRunLoopRemoveObserver(run_loop_, enter_exit_observer_, kCFRunLoopCommonModes);
+  CFRelease(enter_exit_observer_);
+
+  CFRunLoopRemoveObserver(run_loop_, pre_source_observer_, kCFRunLoopCommonModes);
+  CFRelease(pre_source_observer_);
+
+  CFRunLoopRemoveObserver(run_loop_, pre_wait_observer_, kCFRunLoopCommonModes);
+  CFRelease(pre_wait_observer_);
+
+  CFRunLoopRemoveSource(run_loop_, nesting_deferred_work_source_, kCFRunLoopCommonModes);
+  CFRelease(nesting_deferred_work_source_);
+
+  CFRunLoopRemoveSource(run_loop_, idle_work_source_, kCFRunLoopCommonModes);
+  CFRelease(idle_work_source_);
+
+  CFRunLoopRemoveSource(run_loop_, delayed_work_source_, kCFRunLoopCommonModes);
+  CFRelease(delayed_work_source_);
+
+  CFRunLoopRemoveSource(run_loop_, work_source_, kCFRunLoopCommonModes);
+  CFRelease(work_source_);
+
+  CFRunLoopRemoveTimer(run_loop_, delayed_work_timer_, kCFRunLoopCommonModes);
+  CFRelease(delayed_work_timer_);
+
+  CFRelease(run_loop_);
+}
+
+// Must be called on the run loop thread.
+void MessagePumpCFRunLoopBase::Run(Delegate* delegate) {
+  // nesting_level_ will be incremented in EnterExitRunLoop, so set
+  // run_nesting_level_ accordingly.
+  int last_run_nesting_level = run_nesting_level_;
+  run_nesting_level_ = nesting_level_ + 1;
+
+  Delegate* last_delegate = delegate_;
+  delegate_ = delegate;
+
+  if (delegate) {
+    // If any work showed up but could not be dispatched for want of a
+    // delegate, set it up for dispatch again now that a delegate is
+    // available.
+    if (delegateless_work_) {
+      CFRunLoopSourceSignal(work_source_);
+      delegateless_work_ = false;
+    }
+    if (delegateless_delayed_work_) {
+      CFRunLoopSourceSignal(delayed_work_source_);
+      delegateless_delayed_work_ = false;
+    }
+    if (delegateless_idle_work_) {
+      CFRunLoopSourceSignal(idle_work_source_);
+      delegateless_idle_work_ = false;
+    }
+  }
+
+  DoRun(delegate);
+
+  // Restore the previous state of the object.
+  delegate_ = last_delegate;
+  run_nesting_level_ = last_run_nesting_level;
+}
+
+// May be called on any thread.
+void MessagePumpCFRunLoopBase::ScheduleWork() {
+  CFRunLoopSourceSignal(work_source_);
+  CFRunLoopWakeUp(run_loop_);
+}
+
+// Must be called on the run loop thread.
+void MessagePumpCFRunLoopBase::ScheduleDelayedWork(const TimeTicks& delayed_work_time) {
+  TimeDelta delta = delayed_work_time - TimeTicks::Now();
+  delayed_work_fire_time_ = CFAbsoluteTimeGetCurrent() + delta.InSecondsF();
+  CFRunLoopTimerSetNextFireDate(delayed_work_timer_, delayed_work_fire_time_);
+}
+
+// Called from the run loop.
+// static
+void MessagePumpCFRunLoopBase::RunDelayedWorkTimer(CFRunLoopTimerRef timer, void* info) {
+  MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
+
+  // The timer won't fire again until it's reset.
+  self->delayed_work_fire_time_ = kCFTimeIntervalMax;
+
+  // CFRunLoopTimers fire outside of the priority scheme for CFRunLoopSources.
+  // In order to establish the proper priority where delegate_->DoDelayedWork
+  // can only be called if delegate_->DoWork returns false, the timer used
+  // to schedule delayed work must signal a CFRunLoopSource set at a lower
+  // priority than the one used for delegate_->DoWork.
+  CFRunLoopSourceSignal(self->delayed_work_source_);
+}
+
+// Called from the run loop.
+// static
+void MessagePumpCFRunLoopBase::RunWorkSource(void* info) {
+  MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
+  self->RunWork();
+}
+
+// Called by MessagePumpCFRunLoopBase::RunWorkSource.
+bool MessagePumpCFRunLoopBase::RunWork() {
+  if (!delegate_) {
+    // This point can be reached with a NULL delegate_ if Run is not on the
+    // stack but foreign code is spinning the CFRunLoop.  Arrange to come back
+    // here when a delegate is available.
+    delegateless_work_ = true;
+    return false;
+  }
+
+  // The NSApplication-based run loop only drains the autorelease pool at each
+  // UI event (NSEvent).  The autorelease pool is not drained for each
+  // CFRunLoopSource target that's run.  Use a local pool for any autoreleased
+  // objects if the app is not currently handling a UI event to ensure they're
+  // released promptly even in the absence of UI events.
+  MessagePumpScopedAutoreleasePool autorelease_pool(this);
+
+  // Call DoWork once, and if something was done, arrange to come back here
+  // again as long as the loop is still running.
+  bool did_work = delegate_->DoWork();
+  if (did_work) {
+    CFRunLoopSourceSignal(work_source_);
+  }
+
+  return did_work;
+}
+
+// Called from the run loop.
+// static
+void MessagePumpCFRunLoopBase::RunDelayedWorkSource(void* info) {
+  MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
+  self->RunDelayedWork();
+}
+
+// Called by MessagePumpCFRunLoopBase::RunDelayedWorkSource.
+bool MessagePumpCFRunLoopBase::RunDelayedWork() {
+  if (!delegate_) {
+    // This point can be reached with a NULL delegate_ if Run is not on the
+    // stack but foreign code is spinning the CFRunLoop.  Arrange to come back
+    // here when a delegate is available.
+    delegateless_delayed_work_ = true;
+    return false;
+  }
+
+  // The NSApplication-based run loop only drains the autorelease pool at each
+  // UI event (NSEvent).  The autorelease pool is not drained for each
+  // CFRunLoopSource target that's run.  Use a local pool for any autoreleased
+  // objects if the app is not currently handling a UI event to ensure they're
+  // released promptly even in the absence of UI events.
+  MessagePumpScopedAutoreleasePool autorelease_pool(this);
+
+  TimeTicks next_time;
+  delegate_->DoDelayedWork(&next_time);
+
+  bool more_work = !next_time.is_null();
+  if (more_work) {
+    TimeDelta delay = next_time - TimeTicks::Now();
+    if (delay > TimeDelta()) {
+      // There's more delayed work to be done in the future.
+      ScheduleDelayedWork(next_time);
+    } else {
+      // There's more delayed work to be done, and its time is in the past.
+      // Arrange to come back here directly as long as the loop is still
+      // running.
+      CFRunLoopSourceSignal(delayed_work_source_);
+    }
+  }
+
+  return more_work;
+}
+
+// Called from the run loop.
+// static
+void MessagePumpCFRunLoopBase::RunIdleWorkSource(void* info) {
+  MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
+  self->RunIdleWork();
+}
+
+// Called by MessagePumpCFRunLoopBase::RunIdleWorkSource.
+bool MessagePumpCFRunLoopBase::RunIdleWork() {
+  if (!delegate_) {
+    // This point can be reached with a NULL delegate_ if Run is not on the
+    // stack but foreign code is spinning the CFRunLoop.  Arrange to come back
+    // here when a delegate is available.
+    delegateless_idle_work_ = true;
+    return false;
+  }
+
+  // The NSApplication-based run loop only drains the autorelease pool at each
+  // UI event (NSEvent).  The autorelease pool is not drained for each
+  // CFRunLoopSource target that's run.  Use a local pool for any autoreleased
+  // objects if the app is not currently handling a UI event to ensure they're
+  // released promptly even in the absence of UI events.
+  MessagePumpScopedAutoreleasePool autorelease_pool(this);
+
+  // Call DoIdleWork once, and if something was done, arrange to come back here
+  // again as long as the loop is still running.
+  bool did_work = delegate_->DoIdleWork();
+  if (did_work) {
+    CFRunLoopSourceSignal(idle_work_source_);
+  }
+
+  return did_work;
+}
+
+// Called from the run loop.
+// static
+void MessagePumpCFRunLoopBase::RunNestingDeferredWorkSource(void* info) {
+  MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
+  self->RunNestingDeferredWork();
+}
+
+// Called by MessagePumpCFRunLoopBase::RunNestingDeferredWorkSource.
+bool MessagePumpCFRunLoopBase::RunNestingDeferredWork() {
+  if (!delegate_) {
+    // This point can be reached with a NULL delegate_ if Run is not on the
+    // stack but foreign code is spinning the CFRunLoop.  There's no sense in
+    // attempting to do any work or signalling the work sources because
+    // without a delegate, work is not possible.
+    return false;
+  }
+
+  // Immediately try work in priority order.
+  if (!RunWork()) {
+    if (!RunDelayedWork()) {
+      if (!RunIdleWork()) {
+        return false;
+      }
+    } else {
+      // There was no work, and delayed work was done.  Arrange for the loop
+      // to try non-nestable idle work on a subsequent pass.
+      CFRunLoopSourceSignal(idle_work_source_);
+    }
+  } else {
+    // Work was done.  Arrange for the loop to try non-nestable delayed and
+    // idle work on a subsequent pass.
+    CFRunLoopSourceSignal(delayed_work_source_);
+    CFRunLoopSourceSignal(idle_work_source_);
+  }
+
+  return true;
+}
+
+// Called before the run loop goes to sleep or exits, or processes sources.
+void MessagePumpCFRunLoopBase::MaybeScheduleNestingDeferredWork() {
+  // deepest_nesting_level_ is set as run loops are entered.  If the deepest
+  // level encountered is deeper than the current level, a nested loop
+  // (relative to the current level) ran since the last time nesting-deferred
+  // work was scheduled.  When that situation is encountered, schedule
+  // nesting-deferred work in case any work was deferred because nested work
+  // was disallowed.
+  if (deepest_nesting_level_ > nesting_level_) {
+    deepest_nesting_level_ = nesting_level_;
+    CFRunLoopSourceSignal(nesting_deferred_work_source_);
+  }
+}
+
+// Called from the run loop.
+// static
+void MessagePumpCFRunLoopBase::PreWaitObserver(CFRunLoopObserverRef observer,
+                                               CFRunLoopActivity activity, void* info) {
+  MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
+
+  // Attempt to do some idle work before going to sleep.
+  self->RunIdleWork();
+
+  // The run loop is about to go to sleep.  If any of the work done since it
+  // started or woke up resulted in a nested run loop running,
+  // nesting-deferred work may have accumulated.  Schedule it for processing
+  // if appropriate.
+  self->MaybeScheduleNestingDeferredWork();
+}
+
+// Called from the run loop.
+// static
+void MessagePumpCFRunLoopBase::PreSourceObserver(CFRunLoopObserverRef observer,
+                                                 CFRunLoopActivity activity, void* info) {
+  MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
+
+  // The run loop has reached the top of the loop and is about to begin
+  // processing sources.  If the last iteration of the loop at this nesting
+  // level did not sleep or exit, nesting-deferred work may have accumulated
+  // if a nested loop ran.  Schedule nesting-deferred work for processing if
+  // appropriate.
+  self->MaybeScheduleNestingDeferredWork();
+}
+
+// Called from the run loop.
+// static
+void MessagePumpCFRunLoopBase::EnterExitObserver(CFRunLoopObserverRef observer,
+                                                 CFRunLoopActivity activity, void* info) {
+  MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
+
+  switch (activity) {
+    case kCFRunLoopEntry:
+      ++self->nesting_level_;
+      if (self->nesting_level_ > self->deepest_nesting_level_) {
+        self->deepest_nesting_level_ = self->nesting_level_;
+      }
+      break;
+
+    case kCFRunLoopExit:
+      // Not all run loops go to sleep.  If a run loop is stopped before it
+      // goes to sleep due to a CFRunLoopStop call, or if the timeout passed
+      // to CFRunLoopRunInMode expires, the run loop may proceed directly from
+      // handling sources to exiting without any sleep.  This most commonly
+      // occurs when CFRunLoopRunInMode is passed a timeout of 0, causing it
+      // to make a single pass through the loop and exit without sleep.  Some
+      // native loops use CFRunLoop in this way.  Because PreWaitObserver will
+      // not be called in these case, MaybeScheduleNestingDeferredWork needs
+      // to be called here, as the run loop exits.
+      //
+      // MaybeScheduleNestingDeferredWork consults self->nesting_level_
+      // to determine whether to schedule nesting-deferred work.  It expects
+      // the nesting level to be set to the depth of the loop that is going
+      // to sleep or exiting.  It must be called before decrementing the
+      // value so that the value still corresponds to the level of the exiting
+      // loop.
+      self->MaybeScheduleNestingDeferredWork();
+      --self->nesting_level_;
+      break;
+
+    default:
+      break;
+  }
+
+  self->EnterExitRunLoop(activity);
+}
+
+// Called from the run loop.
+// static
+void MessagePumpCFRunLoopBase::PowerStateNotification(void* info, io_service_t service,
+                                                      uint32_t message_type,
+                                                      void* message_argument) {
+  // CFRunLoopTimer (NSTimer) is scheduled in terms of CFAbsoluteTime, which
+  // measures the number of seconds since 2001-01-01 00:00:00.0 Z.  It is
+  // implemented in terms of kernel ticks, as in mach_absolute_time.  While an
+  // offset and scale factor can be applied to convert between the two time
+  // bases at any time after boot, the kernel clock stops while the system is
+  // asleep, altering the offset.  (The offset will also change when the
+  // real-time clock is adjusted.)  CFRunLoopTimers are not readjusted to take
+  // this into account when the system wakes up, so any timers that were
+  // pending while the system was asleep will be delayed by the sleep
+  // duration.
+  //
+  // The MessagePump interface assumes that scheduled delayed work will be
+  // performed at the time ScheduleDelayedWork was asked to perform it.  The
+  // delay caused by the CFRunLoopTimer not firing at the appropriate time
+  // results in a stall of queued delayed work when the system wakes up.
+  // With this limitation, scheduled work would not be performed until
+  // (system wake time + scheduled work time - system sleep time), while it
+  // would be expected to be performed at (scheduled work time).
+  //
+  // To work around this problem, when the system wakes up from sleep, if a
+  // delayed work timer is pending, it is rescheduled to fire at the original
+  // time that it was scheduled to fire.
+  //
+  // This mechanism is not resilient if the real-time clock does not maintain
+  // stable time while the system is sleeping, but it matches the behavior of
+  // the various other MessagePump implementations, and MessageLoop seems to
+  // be limited in the same way.
+  //
+  // References
+  //  - Chris Kane, "NSTimer and deep sleep," cocoa-dev@lists.apple.com,
+  //    http://lists.apple.com/archives/Cocoa-dev/2002/May/msg01547.html
+  //  - Apple Technical Q&A QA1340, "Registering and unregistering for sleep
+  //    and wake notifications,"
+  //    http://developer.apple.com/mac/library/qa/qa2004/qa1340.html
+  //  - Core Foundation source code, CF-550/CFRunLoop.c and CF-550/CFDate.c,
+  //    http://www.opensource.apple.com/
+
+  MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
+
+  switch (message_type) {
+    case kIOMessageSystemWillPowerOn:
+      if (self->delayed_work_fire_time_ != kCFTimeIntervalMax) {
+        CFRunLoopTimerSetNextFireDate(self->delayed_work_timer_, self->delayed_work_fire_time_);
+      }
+      break;
+
+    case kIOMessageSystemWillSleep:
+    case kIOMessageCanSystemSleep:
+      // The system will wait for 30 seconds before entering sleep if neither
+      // IOAllowPowerChange nor IOCancelPowerChange are called.  That would be
+      // pretty antisocial.
+      IOAllowPowerChange(self->root_power_domain_, reinterpret_cast<long>(message_argument));
+      break;
+
+    default:
+      break;
+  }
+}
+
+// Called by MessagePumpCFRunLoopBase::EnterExitRunLoop.  The default
+// implementation is a no-op.
+void MessagePumpCFRunLoopBase::EnterExitRunLoop(CFRunLoopActivity activity) {}
+
+// Base version returns a standard NSAutoreleasePool.
+NSAutoreleasePool* MessagePumpCFRunLoopBase::CreateAutoreleasePool() {
+  return [[NSAutoreleasePool alloc] init];
+}
+
+MessagePumpCFRunLoop::MessagePumpCFRunLoop() : quit_pending_(false) {}
+
+// Called by MessagePumpCFRunLoopBase::DoRun.  If other CFRunLoopRun loops were
+// running lower on the run loop thread's stack when this object was created,
+// the same number of CFRunLoopRun loops must be running for the outermost call
+// to Run.  Run/DoRun are reentrant after that point.
+void MessagePumpCFRunLoop::DoRun(Delegate* delegate) {
+  // This is completely identical to calling CFRunLoopRun(), except autorelease
+  // pool management is introduced.
+  int result;
+  do {
+    MessagePumpScopedAutoreleasePool autorelease_pool(this);
+    result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, kCFTimeIntervalMax, false);
+  } while (result != kCFRunLoopRunStopped && result != kCFRunLoopRunFinished);
+}
+
+// Must be called on the run loop thread.
+void MessagePumpCFRunLoop::Quit() {
+  // Stop the innermost run loop managed by this MessagePumpCFRunLoop object.
+  if (nesting_level() == run_nesting_level()) {
+    // This object is running the innermost loop, just stop it.
+    CFRunLoopStop(run_loop());
+  } else {
+    // There's another loop running inside the loop managed by this object.
+    // In other words, someone else called CFRunLoopRunInMode on the same
+    // thread, deeper on the stack than the deepest Run call.  Don't preempt
+    // other run loops, just mark this object to quit the innermost Run as
+    // soon as the other inner loops not managed by Run are done.
+    quit_pending_ = true;
+  }
+}
+
+// Called by MessagePumpCFRunLoopBase::EnterExitObserver.
+void MessagePumpCFRunLoop::EnterExitRunLoop(CFRunLoopActivity activity) {
+  if (activity == kCFRunLoopExit && nesting_level() == run_nesting_level() && quit_pending_) {
+    // Quit was called while loops other than those managed by this object
+    // were running further inside a run loop managed by this object.  Now
+    // that all unmanaged inner run loops are gone, stop the loop running
+    // just inside Run.
+    CFRunLoopStop(run_loop());
+    quit_pending_ = false;
+  }
+}
+
+MessagePumpNSRunLoop::MessagePumpNSRunLoop() : keep_running_(true) {
+  CFRunLoopSourceContext source_context = CFRunLoopSourceContext();
+  source_context.perform = NoOp;
+  quit_source_ = CFRunLoopSourceCreate(NULL,  // allocator
+                                       0,     // priority
+                                       &source_context);
+  CFRunLoopAddSource(run_loop(), quit_source_, kCFRunLoopCommonModes);
+}
+
+MessagePumpNSRunLoop::~MessagePumpNSRunLoop() {
+  CFRunLoopRemoveSource(run_loop(), quit_source_, kCFRunLoopCommonModes);
+  CFRelease(quit_source_);
+}
+
+void MessagePumpNSRunLoop::DoRun(Delegate* delegate) {
+  while (keep_running_) {
+    // NSRunLoop manages autorelease pools itself.
+    [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
+  }
+
+  keep_running_ = true;
+}
+
+void MessagePumpNSRunLoop::Quit() {
+  keep_running_ = false;
+  CFRunLoopSourceSignal(quit_source_);
+  CFRunLoopWakeUp(run_loop());
+}
+
+MessagePumpNSApplication::MessagePumpNSApplication()
+    : keep_running_(true), running_own_loop_(false) {}
+
+void MessagePumpNSApplication::DoRun(Delegate* delegate) {
+  bool last_running_own_loop_ = running_own_loop_;
+
+  // TODO(dmaclach): Get rid of this gratuitous sharedApplication.
+  // Tests should be setting up their applications on their own.
+  [CrApplication sharedApplication];
+
+  if (![NSApp isRunning]) {
+    running_own_loop_ = false;
+    // NSApplication manages autorelease pools itself when run this way.
+    [NSApp run];
+  } else {
+    running_own_loop_ = true;
+    NSDate* distant_future = [NSDate distantFuture];
+    while (keep_running_) {
+      MessagePumpScopedAutoreleasePool autorelease_pool(this);
+      NSEvent* event = [NSApp nextEventMatchingMask:NSEventMaskAny
+                                          untilDate:distant_future
+                                             inMode:NSDefaultRunLoopMode
+                                            dequeue:YES];
+      if (event) {
+        [NSApp sendEvent:event];
+      }
+    }
+    keep_running_ = true;
+  }
+
+  running_own_loop_ = last_running_own_loop_;
+}
+
+void MessagePumpNSApplication::Quit() {
+  if (!running_own_loop_) {
+    [NSApp stop:nil];
+  } else {
+    keep_running_ = false;
+  }
+
+  // Send a fake event to wake the loop up.
+  [NSApp postEvent:[NSEvent otherEventWithType:NSEventTypeApplicationDefined
+                                      location:NSMakePoint(0, 0)
+                                 modifierFlags:0
+                                     timestamp:0
+                                  windowNumber:0
+                                       context:NULL
+                                       subtype:0
+                                         data1:0
+                                         data2:0]
+           atStart:NO];
+}
+
+// Prevents an autorelease pool from being created if the app is in the midst of
+// handling a UI event because various parts of AppKit depend on objects that
+// are created while handling a UI event to be autoreleased in the event loop.
+// An example of this is NSWindowController. When a window with a window
+// controller is closed it goes through a stack like this:
+// (Several stack frames elided for clarity)
+//
+// #0 [NSWindowController autorelease]
+// #1 DoAClose
+// #2 MessagePumpCFRunLoopBase::DoWork()
+// #3 [NSRunLoop run]
+// #4 [NSButton performClick:]
+// #5 [NSWindow sendEvent:]
+// #6 [NSApp sendEvent:]
+// #7 [NSApp run]
+//
+// -performClick: spins a nested run loop. If the pool created in DoWork was a
+// standard NSAutoreleasePool, it would release the objects that were
+// autoreleased into it once DoWork released it. This would cause the window
+// controller, which autoreleased itself in frame #0, to release itself, and
+// possibly free itself. Unfortunately this window controller controls the
+// window in frame #5. When the stack is unwound to frame #5, the window would
+// no longer exists and crashes may occur. Apple gets around this by never
+// releasing the pool it creates in frame #4, and letting frame #7 clean it up
+// when it cleans up the pool that wraps frame #7. When an autorelease pool is
+// released it releases all other pools that were created after it on the
+// autorelease pool stack.
+//
+// CrApplication is responsible for setting handlingSendEvent to true just
+// before it sends the event throught the event handling mechanism, and
+// returning it to its previous value once the event has been sent.
+NSAutoreleasePool* MessagePumpNSApplication::CreateAutoreleasePool() {
+  NSAutoreleasePool* pool = nil;
+  DCHECK([NSApp isKindOfClass:[CrApplication class]]);
+  if (![static_cast<CrApplication*>(NSApp) isHandlingSendEvent]) {
+    pool = MessagePumpCFRunLoopBase::CreateAutoreleasePool();
+  }
+  return pool;
+}
+
+// static
+MessagePump* MessagePumpMac::Create() {
+  if ([NSThread isMainThread]) {
+    return new MessagePumpNSApplication;
+  }
+
+  return new MessagePumpNSRunLoop;
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/message_pump_qt.cc b/ipc/chromium/src/base/message_pump_qt.cc
new file mode 100644
index 0000000000..d96e2c5e62
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_qt.cc
@@ -0,0 +1,177 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <qabstracteventdispatcher.h>
+#include <qevent.h>
+#include <QCoreApplication>
+#include <QThread>
+#include <qtimer.h>
+
+#include "base/message_pump_qt.h"
+
+#include <fcntl.h>
+#include <limits>
+#include <math.h>
+
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+#include "base/platform_thread.h"
+
+namespace {
+// Cached QEvent user type, registered for our event system
+static int sPokeEvent;
+}  // namespace
+
+namespace base {
+
+MessagePumpForUI::MessagePumpForUI() : state_(NULL), qt_pump(*this) {}
+
+MessagePumpForUI::~MessagePumpForUI() {}
+
+MessagePumpQt::MessagePumpQt(MessagePumpForUI& aPump)
+    : pump(aPump), mTimer(new QTimer(this)) {
+  // Register our custom event type, to use in qApp event loop
+  sPokeEvent = QEvent::registerEventType();
+  connect(mTimer, SIGNAL(timeout()), this, SLOT(dispatchDelayed()));
+  mTimer->setSingleShot(true);
+}
+
+MessagePumpQt::~MessagePumpQt() {
+  mTimer->stop();
+  delete mTimer;
+}
+
+bool MessagePumpQt::event(QEvent* e) {
+  if (e->type() == sPokeEvent) {
+    pump.HandleDispatch();
+    return true;
+  }
+  return false;
+}
+
+void MessagePumpQt::scheduleDelayedIfNeeded(
+    const TimeTicks& delayed_work_time) {
+  if (delayed_work_time.is_null()) {
+    return;
+  }
+
+  if (mTimer->isActive()) {
+    mTimer->stop();
+  }
+
+  TimeDelta later = delayed_work_time - TimeTicks::Now();
+  // later.InMilliseconds() returns an int64_t, QTimer only accepts int's for
+  // start(), std::min only works on exact same types.
+  int laterMsecs = later.InMilliseconds() > std::numeric_limits<int>::max()
+                       ? std::numeric_limits<int>::max()
+                       : later.InMilliseconds();
+  mTimer->start(laterMsecs > 0 ? laterMsecs : 0);
+}
+
+void MessagePumpQt::dispatchDelayed() { pump.HandleDispatch(); }
+
+void MessagePumpForUI::Run(Delegate* delegate) {
+  RunState state;
+  state.delegate = delegate;
+  state.should_quit = false;
+  state.run_depth = state_ ? state_->run_depth + 1 : 1;
+  // We really only do a single task for each iteration of the loop.  If we
+  // have done something, assume there is likely something more to do.  This
+  // will mean that we don't block on the message pump until there was nothing
+  // more to do.  We also set this to true to make sure not to block on the
+  // first iteration of the loop, so RunAllPending() works correctly.
+  bool more_work_is_plausible = true;
+
+  RunState* previous_state = state_;
+  state_ = &state;
+
+  for (;;) {
+    QEventLoop::ProcessEventsFlags block = QEventLoop::AllEvents;
+    if (!more_work_is_plausible) {
+      block |= QEventLoop::WaitForMoreEvents;
+    }
+
+    QAbstractEventDispatcher* dispatcher =
+        QAbstractEventDispatcher::instance(QThread::currentThread());
+    // An assertion seems too much here, as during startup,
+    // the dispatcher might not be ready yet.
+    if (!dispatcher) {
+      return;
+    }
+
+    // processEvent's returns true if an event has been processed.
+    more_work_is_plausible = dispatcher->processEvents(block);
+
+    if (state_->should_quit) {
+      break;
+    }
+
+    more_work_is_plausible |= state_->delegate->DoWork();
+    if (state_->should_quit) {
+      break;
+    }
+
+    more_work_is_plausible |=
+        state_->delegate->DoDelayedWork(&delayed_work_time_);
+    if (state_->should_quit) {
+      break;
+    }
+
+    qt_pump.scheduleDelayedIfNeeded(delayed_work_time_);
+
+    if (more_work_is_plausible) {
+      continue;
+    }
+
+    more_work_is_plausible = state_->delegate->DoIdleWork();
+    if (state_->should_quit) {
+      break;
+    }
+  }
+
+  state_ = previous_state;
+}
+
+void MessagePumpForUI::HandleDispatch() {
+  if (state_->should_quit) {
+    return;
+  }
+
+  if (state_->delegate->DoWork()) {
+    // there might be more, see more_work_is_plausible
+    // variable above, that's why we ScheduleWork() to keep going.
+    ScheduleWork();
+  }
+
+  if (state_->should_quit) {
+    return;
+  }
+
+  state_->delegate->DoDelayedWork(&delayed_work_time_);
+  qt_pump.scheduleDelayedIfNeeded(delayed_work_time_);
+}
+
+void MessagePumpForUI::Quit() {
+  if (state_) {
+    state_->should_quit = true;
+  } else {
+    NOTREACHED() << "Quit called outside Run!";
+  }
+}
+
+void MessagePumpForUI::ScheduleWork() {
+  QCoreApplication::postEvent(&qt_pump, new QEvent((QEvent::Type)sPokeEvent));
+}
+
+void MessagePumpForUI::ScheduleDelayedWork(const TimeTicks& delayed_work_time) {
+  // On GLib implementation, a work source is defined which explicitly checks
+  // the time that has passed. Here, on Qt we can use a QTimer that enqueues our
+  // event signal in an event queue.
+  delayed_work_time_ = delayed_work_time;
+  qt_pump.scheduleDelayedIfNeeded(delayed_work_time_);
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/message_pump_qt.h b/ipc/chromium/src/base/message_pump_qt.h
new file mode 100644
index 0000000000..b96af80bc2
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_qt.h
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MESSAGE_PUMP_QT_H_
+#define BASE_MESSAGE_PUMP_QT_H_
+
+#include <qobject.h>
+
+#include "base/message_pump.h"
+#include "base/time.h"
+
+class QTimer;
+
+namespace base {
+
+class MessagePumpForUI;
+
+class MessagePumpQt : public QObject {
+  Q_OBJECT
+
+ public:
+  MessagePumpQt(MessagePumpForUI& pump);
+  ~MessagePumpQt();
+
+  virtual bool event(QEvent* e);
+  void scheduleDelayedIfNeeded(const TimeTicks& delayed_work_time);
+
+ public Q_SLOTS:
+  void dispatchDelayed();
+
+ private:
+  base::MessagePumpForUI& pump;
+  QTimer* mTimer;
+};
+
+// This class implements a MessagePump needed for TYPE_UI MessageLoops on
+// OS_LINUX platforms using QApplication event loop
+class MessagePumpForUI : public MessagePump {
+ public:
+  MessagePumpForUI();
+  ~MessagePumpForUI();
+
+  virtual void Run(Delegate* delegate);
+  virtual void Quit();
+  virtual void ScheduleWork();
+  virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time);
+
+  // Internal methods used for processing the pump callbacks.  They are
+  // public for simplicity but should not be used directly.
+  // HandleDispatch is called after the poll has completed.
+  void HandleDispatch();
+
+ private:
+  // We may make recursive calls to Run, so we save state that needs to be
+  // separate between them in this structure type.
+  struct RunState {
+    Delegate* delegate;
+
+    // Used to flag that the current Run() invocation should return ASAP.
+    bool should_quit;
+
+    // Used to count how many Run() invocations are on the stack.
+    int run_depth;
+  };
+
+  RunState* state_;
+
+  // This is the time when we need to do delayed work.
+  TimeTicks delayed_work_time_;
+
+  // MessagePump implementation for Qt based on the GLib implement.
+  // On Qt we use a QObject base class and the
+  // default qApp in order to process events through QEventLoop.
+  MessagePumpQt qt_pump;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePumpForUI);
+};
+
+}  // namespace base
+
+#endif  // BASE_MESSAGE_PUMP_QT_H_
diff --git a/ipc/chromium/src/base/message_pump_win.cc b/ipc/chromium/src/base/message_pump_win.cc
new file mode 100644
index 0000000000..f0caa1db6c
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_win.cc
@@ -0,0 +1,553 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/message_pump_win.h"
+
+#include <math.h>
+
+#include "base/message_loop.h"
+#include "base/histogram.h"
+#include "base/win_util.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/ProfilerLabels.h"
+#include "mozilla/ProfilerThreadSleep.h"
+#include "WinUtils.h"
+
+using base::Time;
+
+namespace base {
+
+static const wchar_t kWndClass[] = L"Chrome_MessagePumpWindow";
+
+// Message sent to get an additional time slice for pumping (processing) another
+// task (a series of such messages creates a continuous task pump).
+static const int kMsgHaveWork = WM_USER + 1;
+
+//-----------------------------------------------------------------------------
+// MessagePumpWin public:
+
+void MessagePumpWin::AddObserver(Observer* observer) {
+  observers_.AddObserver(observer);
+}
+
+void MessagePumpWin::RemoveObserver(Observer* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void MessagePumpWin::WillProcessMessage(const MSG& msg) {
+  FOR_EACH_OBSERVER(Observer, observers_, WillProcessMessage(msg));
+}
+
+void MessagePumpWin::DidProcessMessage(const MSG& msg) {
+  FOR_EACH_OBSERVER(Observer, observers_, DidProcessMessage(msg));
+}
+
+void MessagePumpWin::RunWithDispatcher(Delegate* delegate,
+                                       Dispatcher* dispatcher) {
+  RunState s;
+  s.delegate = delegate;
+  s.dispatcher = dispatcher;
+  s.should_quit = false;
+  s.run_depth = state_ ? state_->run_depth + 1 : 1;
+
+  RunState* previous_state = state_;
+  state_ = &s;
+
+  DoRunLoop();
+
+  state_ = previous_state;
+}
+
+void MessagePumpWin::Quit() {
+  DCHECK(state_);
+  state_->should_quit = true;
+}
+
+//-----------------------------------------------------------------------------
+// MessagePumpWin protected:
+
+int MessagePumpWin::GetCurrentDelay() const {
+  if (delayed_work_time_.is_null()) return -1;
+
+  // Be careful here.  TimeDelta has a precision of microseconds, but we want a
+  // value in milliseconds.  If there are 5.5ms left, should the delay be 5 or
+  // 6?  It should be 6 to avoid executing delayed work too early.
+  double timeout =
+      ceil((delayed_work_time_ - TimeTicks::Now()).InMillisecondsF());
+
+  // If this value is negative, then we need to run delayed work soon.
+  int delay = static_cast<int>(timeout);
+  if (delay < 0) delay = 0;
+
+  return delay;
+}
+
+//-----------------------------------------------------------------------------
+// MessagePumpForUI public:
+
+MessagePumpForUI::MessagePumpForUI() { InitMessageWnd(); }
+
+MessagePumpForUI::~MessagePumpForUI() {
+  DestroyWindow(message_hwnd_);
+  UnregisterClass(kWndClass, GetModuleHandle(NULL));
+}
+
+void MessagePumpForUI::ScheduleWork() {
+  if (InterlockedExchange(&have_work_, 1))
+    return;  // Someone else continued the pumping.
+
+  // Make sure the MessagePump does some work for us.
+  PostMessage(message_hwnd_, kMsgHaveWork, reinterpret_cast<WPARAM>(this), 0);
+
+  // In order to wake up any cross-process COM calls which may currently be
+  // pending on the main thread, we also have to post a UI message.
+  PostMessage(message_hwnd_, WM_NULL, 0, 0);
+}
+
+void MessagePumpForUI::ScheduleDelayedWork(const TimeTicks& delayed_work_time) {
+  //
+  // We would *like* to provide high resolution timers.  Windows timers using
+  // SetTimer() have a 10ms granularity.  We have to use WM_TIMER as a wakeup
+  // mechanism because the application can enter modal windows loops where it
+  // is not running our MessageLoop; the only way to have our timers fire in
+  // these cases is to post messages there.
+  //
+  // To provide sub-10ms timers, we process timers directly from our run loop.
+  // For the common case, timers will be processed there as the run loop does
+  // its normal work.  However, we *also* set the system timer so that WM_TIMER
+  // events fire.  This mops up the case of timers not being able to work in
+  // modal message loops.  It is possible for the SetTimer to pop and have no
+  // pending timers, because they could have already been processed by the
+  // run loop itself.
+  //
+  // We use a single SetTimer corresponding to the timer that will expire
+  // soonest.  As new timers are created and destroyed, we update SetTimer.
+  // Getting a spurrious SetTimer event firing is benign, as we'll just be
+  // processing an empty timer queue.
+  //
+  delayed_work_time_ = delayed_work_time;
+
+  int delay_msec = GetCurrentDelay();
+  DCHECK(delay_msec >= 0);
+  if (delay_msec < USER_TIMER_MINIMUM) delay_msec = USER_TIMER_MINIMUM;
+
+  // Create a WM_TIMER event that will wake us up to check for any pending
+  // timers (in case we are running within a nested, external sub-pump).
+  SetTimer(message_hwnd_, reinterpret_cast<UINT_PTR>(this), delay_msec, NULL);
+}
+
+void MessagePumpForUI::PumpOutPendingPaintMessages() {
+  // If we are being called outside of the context of Run, then don't try to do
+  // any work.
+  if (!state_) return;
+
+  // Create a mini-message-pump to force immediate processing of only Windows
+  // WM_PAINT messages.  Don't provide an infinite loop, but do enough peeking
+  // to get the job done.  Actual common max is 4 peeks, but we'll be a little
+  // safe here.
+  const int kMaxPeekCount = 20;
+  int peek_count;
+  for (peek_count = 0; peek_count < kMaxPeekCount; ++peek_count) {
+    MSG msg;
+    if (!PeekMessage(&msg, NULL, 0, 0, PM_REMOVE | PM_QS_PAINT)) break;
+    ProcessMessageHelper(msg);
+    if (state_->should_quit) break;
+  }
+}
+
+//-----------------------------------------------------------------------------
+// MessagePumpForUI private:
+
+// static
+LRESULT CALLBACK MessagePumpForUI::WndProcThunk(HWND hwnd, UINT message,
+                                                WPARAM wparam, LPARAM lparam) {
+  switch (message) {
+    case kMsgHaveWork:
+      reinterpret_cast<MessagePumpForUI*>(wparam)->HandleWorkMessage();
+      break;
+    case WM_TIMER:
+      reinterpret_cast<MessagePumpForUI*>(wparam)->HandleTimerMessage();
+      break;
+  }
+  return DefWindowProc(hwnd, message, wparam, lparam);
+}
+
+void MessagePumpForUI::DoRunLoop() {
+  // IF this was just a simple PeekMessage() loop (servicing all possible work
+  // queues), then Windows would try to achieve the following order according
+  // to MSDN documentation about PeekMessage with no filter):
+  //    * Sent messages
+  //    * Posted messages
+  //    * Sent messages (again)
+  //    * WM_PAINT messages
+  //    * WM_TIMER messages
+  //
+  // Summary: none of the above classes is starved, and sent messages has twice
+  // the chance of being processed (i.e., reduced service time).
+
+  for (;;) {
+    // If we do any work, we may create more messages etc., and more work may
+    // possibly be waiting in another task group.  When we (for example)
+    // ProcessNextWindowsMessage(), there is a good chance there are still more
+    // messages waiting.  On the other hand, when any of these methods return
+    // having done no work, then it is pretty unlikely that calling them again
+    // quickly will find any work to do.  Finally, if they all say they had no
+    // work, then it is a good time to consider sleeping (waiting) for more
+    // work.
+
+    bool more_work_is_plausible = ProcessNextWindowsMessage();
+    if (state_->should_quit) break;
+
+    more_work_is_plausible |= state_->delegate->DoWork();
+    if (state_->should_quit) break;
+
+    more_work_is_plausible |=
+        state_->delegate->DoDelayedWork(&delayed_work_time_);
+    // If we did not process any delayed work, then we can assume that our
+    // existing WM_TIMER if any will fire when delayed work should run.  We
+    // don't want to disturb that timer if it is already in flight.  However,
+    // if we did do all remaining delayed work, then lets kill the WM_TIMER.
+    if (more_work_is_plausible && delayed_work_time_.is_null())
+      KillTimer(message_hwnd_, reinterpret_cast<UINT_PTR>(this));
+    if (state_->should_quit) break;
+
+    if (more_work_is_plausible) continue;
+
+    more_work_is_plausible = state_->delegate->DoIdleWork();
+    if (state_->should_quit) break;
+
+    if (more_work_is_plausible) continue;
+
+    WaitForWork();  // Wait (sleep) until we have work to do again.
+  }
+}
+
+void MessagePumpForUI::InitMessageWnd() {
+  HINSTANCE hinst = GetModuleHandle(NULL);
+
+  WNDCLASSEX wc = {0};
+  wc.cbSize = sizeof(wc);
+  wc.lpfnWndProc = WndProcThunk;
+  wc.hInstance = hinst;
+  wc.lpszClassName = kWndClass;
+  RegisterClassEx(&wc);
+
+  message_hwnd_ =
+      CreateWindow(kWndClass, 0, 0, 0, 0, 0, 0, HWND_MESSAGE, 0, hinst, 0);
+  DCHECK(message_hwnd_);
+}
+
+void MessagePumpForUI::WaitForWork() {
+  AUTO_PROFILER_LABEL("MessagePumpForUI::WaitForWork", IDLE);
+
+  // Wait until a message is available, up to the time needed by the timer
+  // manager to fire the next set of timers.
+  int delay = GetCurrentDelay();
+  if (delay < 0)  // Negative value means no timers waiting.
+    delay = INFINITE;
+
+  mozilla::widget::WinUtils::WaitForMessage(delay);
+}
+
+void MessagePumpForUI::HandleWorkMessage() {
+  // If we are being called outside of the context of Run, then don't try to do
+  // any work.  This could correspond to a MessageBox call or something of that
+  // sort.
+  if (!state_) {
+    // Since we handled a kMsgHaveWork message, we must still update this flag.
+    InterlockedExchange(&have_work_, 0);
+    return;
+  }
+
+  // Let whatever would have run had we not been putting messages in the queue
+  // run now.  This is an attempt to make our dummy message not starve other
+  // messages that may be in the Windows message queue.
+  ProcessPumpReplacementMessage();
+
+  // Now give the delegate a chance to do some work.  He'll let us know if he
+  // needs to do more work.
+  if (state_->delegate->DoWork()) ScheduleWork();
+}
+
+void MessagePumpForUI::HandleTimerMessage() {
+  KillTimer(message_hwnd_, reinterpret_cast<UINT_PTR>(this));
+
+  // If we are being called outside of the context of Run, then don't do
+  // anything.  This could correspond to a MessageBox call or something of
+  // that sort.
+  if (!state_) return;
+
+  state_->delegate->DoDelayedWork(&delayed_work_time_);
+  if (!delayed_work_time_.is_null()) {
+    // A bit gratuitous to set delayed_work_time_ again, but oh well.
+    ScheduleDelayedWork(delayed_work_time_);
+  }
+}
+
+bool MessagePumpForUI::ProcessNextWindowsMessage() {
+  // If there are sent messages in the queue then PeekMessage internally
+  // dispatches the message and returns false. We return true in this
+  // case to ensure that the message loop peeks again instead of calling
+  // MsgWaitForMultipleObjectsEx again.
+  bool sent_messages_in_queue = false;
+  DWORD queue_status = ::GetQueueStatus(QS_SENDMESSAGE);
+  if (HIWORD(queue_status) & QS_SENDMESSAGE) sent_messages_in_queue = true;
+
+  MSG msg;
+  if (::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+    return ProcessMessageHelper(msg);
+
+  return sent_messages_in_queue;
+}
+
+bool MessagePumpForUI::ProcessMessageHelper(const MSG& msg) {
+  if (WM_QUIT == msg.message) {
+    // WM_QUIT is the standard way to exit a ::GetMessage() loop. Our
+    // MessageLoop has its own quit mechanism, so WM_QUIT is unexpected and
+    // should be ignored.
+    return true;
+  }
+
+  // While running our main message pump, we discard kMsgHaveWork messages.
+  if (msg.message == kMsgHaveWork && msg.hwnd == message_hwnd_)
+    return ProcessPumpReplacementMessage();
+
+  WillProcessMessage(msg);
+
+  if (state_->dispatcher) {
+    if (!state_->dispatcher->Dispatch(msg)) state_->should_quit = true;
+  } else {
+    ::TranslateMessage(&msg);
+    ::DispatchMessage(&msg);
+  }
+
+  DidProcessMessage(msg);
+  return true;
+}
+
+bool MessagePumpForUI::ProcessPumpReplacementMessage() {
+  // When we encounter a kMsgHaveWork message, this method is called to peek
+  // and process a replacement message, such as a WM_PAINT or WM_TIMER.  The
+  // goal is to make the kMsgHaveWork as non-intrusive as possible, even though
+  // a continuous stream of such messages are posted.  This method carefully
+  // peeks a message while there is no chance for a kMsgHaveWork to be pending,
+  // then resets the have_work_ flag (allowing a replacement kMsgHaveWork to
+  // possibly be posted), and finally dispatches that peeked replacement.  Note
+  // that the re-post of kMsgHaveWork may be asynchronous to this thread!!
+
+  MSG msg;
+  bool have_message = false;
+  if (MessageLoop::current()->os_modal_loop()) {
+    // We only peek out WM_PAINT and WM_TIMER here for reasons mentioned above.
+    have_message = ::PeekMessage(&msg, NULL, WM_PAINT, WM_PAINT, PM_REMOVE) ||
+                   ::PeekMessage(&msg, NULL, WM_TIMER, WM_TIMER, PM_REMOVE);
+  } else {
+    have_message = (0 != ::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE));
+
+    if (have_message && msg.message == WM_NULL)
+      have_message = (0 != ::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE));
+  }
+
+  DCHECK(!have_message || kMsgHaveWork != msg.message ||
+         msg.hwnd != message_hwnd_);
+
+  // Since we discarded a kMsgHaveWork message, we must update the flag.
+  int old_have_work = InterlockedExchange(&have_work_, 0);
+  DCHECK(old_have_work);
+
+  // We don't need a special time slice if we didn't have_message to process.
+  if (!have_message) return false;
+
+  if (WM_QUIT == msg.message) {
+    // If we're in a nested ::GetMessage() loop then we must let that loop see
+    // the WM_QUIT in order for it to exit. If we're in DoRunLoop then the re-
+    // posted WM_QUIT will be either ignored, or handled, by
+    // ProcessMessageHelper() called directly from ProcessNextWindowsMessage().
+    ::PostQuitMessage(static_cast<int>(msg.wParam));
+    // Note: we *must not* ScheduleWork() here as WM_QUIT is a low-priority
+    // message on Windows (it is only returned by ::PeekMessage() when idle) :
+    // https://blogs.msdn.microsoft.com/oldnewthing/20051104-33/?p=33453. As
+    // such posting a kMsgHaveWork message via ScheduleWork() would cause an
+    // infinite loop (kMsgHaveWork message handled first means we end up here
+    // again and repost WM_QUIT+ScheduleWork() again, etc.). Not leaving a
+    // kMsgHaveWork message behind however is also problematic as unwinding
+    // multiple layers of nested ::GetMessage() loops can result in starving
+    // application tasks. TODO(https://crbug.com/890016) : Fix this.
+
+    // The return value is mostly irrelevant but return true like we would after
+    // processing a QuitClosure() task.
+    return true;
+  }
+
+  // Guarantee we'll get another time slice in the case where we go into native
+  // windows code. This ScheduleWork() may hurt performance a tiny bit when
+  // tasks appear very infrequently, but when the event queue is busy, the
+  // kMsgHaveWork events get (percentage wise) rarer and rarer.
+  ScheduleWork();
+  return ProcessMessageHelper(msg);
+}
+
+//-----------------------------------------------------------------------------
+// MessagePumpForIO public:
+
+MessagePumpForIO::MessagePumpForIO() {
+  port_.Set(CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 1));
+  DCHECK(port_.IsValid());
+}
+
+void MessagePumpForIO::ScheduleWork() {
+  if (InterlockedExchange(&have_work_, 1))
+    return;  // Someone else continued the pumping.
+
+  // Make sure the MessagePump does some work for us.
+  BOOL ret =
+      PostQueuedCompletionStatus(port_, 0, reinterpret_cast<ULONG_PTR>(this),
+                                 reinterpret_cast<OVERLAPPED*>(this));
+  DCHECK(ret);
+}
+
+void MessagePumpForIO::ScheduleDelayedWork(const TimeTicks& delayed_work_time) {
+  // We know that we can't be blocked right now since this method can only be
+  // called on the same thread as Run, so we only need to update our record of
+  // how long to sleep when we do sleep.
+  delayed_work_time_ = delayed_work_time;
+}
+
+void MessagePumpForIO::RegisterIOHandler(HANDLE file_handle,
+                                         IOHandler* handler) {
+  ULONG_PTR key = reinterpret_cast<ULONG_PTR>(handler);
+  HANDLE port = CreateIoCompletionPort(file_handle, port_, key, 1);
+  DCHECK(port == port_.Get());
+}
+
+//-----------------------------------------------------------------------------
+// MessagePumpForIO private:
+
+void MessagePumpForIO::DoRunLoop() {
+  for (;;) {
+    // If we do any work, we may create more messages etc., and more work may
+    // possibly be waiting in another task group.  When we (for example)
+    // WaitForIOCompletion(), there is a good chance there are still more
+    // messages waiting.  On the other hand, when any of these methods return
+    // having done no work, then it is pretty unlikely that calling them
+    // again quickly will find any work to do.  Finally, if they all say they
+    // had no work, then it is a good time to consider sleeping (waiting) for
+    // more work.
+
+    bool more_work_is_plausible = state_->delegate->DoWork();
+    if (state_->should_quit) break;
+
+    more_work_is_plausible |= WaitForIOCompletion(0, NULL);
+    if (state_->should_quit) break;
+
+    more_work_is_plausible |=
+        state_->delegate->DoDelayedWork(&delayed_work_time_);
+    if (state_->should_quit) break;
+
+    if (more_work_is_plausible) continue;
+
+    more_work_is_plausible = state_->delegate->DoIdleWork();
+    if (state_->should_quit) break;
+
+    if (more_work_is_plausible) continue;
+
+    WaitForWork();  // Wait (sleep) until we have work to do again.
+  }
+}
+
+// Wait until IO completes, up to the time needed by the timer manager to fire
+// the next set of timers.
+void MessagePumpForIO::WaitForWork() {
+  // We do not support nested IO message loops. This is to avoid messy
+  // recursion problems.
+  DCHECK(state_->run_depth == 1) << "Cannot nest an IO message loop!";
+
+  int timeout = GetCurrentDelay();
+  if (timeout < 0)  // Negative value means no timers waiting.
+    timeout = INFINITE;
+
+  WaitForIOCompletion(timeout, NULL);
+}
+
+bool MessagePumpForIO::WaitForIOCompletion(DWORD timeout, IOHandler* filter) {
+  IOItem item;
+  if (completed_io_.empty() || !MatchCompletedIOItem(filter, &item)) {
+    // We have to ask the system for another IO completion.
+    if (!GetIOItem(timeout, &item)) return false;
+
+    if (ProcessInternalIOItem(item)) return true;
+  }
+
+  if (item.context->handler) {
+    if (filter && item.handler != filter) {
+      // Save this item for later
+      completed_io_.push_back(item);
+    } else {
+      DCHECK(item.context->handler == item.handler);
+      item.handler->OnIOCompleted(item.context, item.bytes_transfered,
+                                  item.error);
+    }
+  } else {
+    // The handler must be gone by now, just cleanup the mess.
+    delete item.context;
+  }
+  return true;
+}
+
+// Asks the OS for another IO completion result.
+bool MessagePumpForIO::GetIOItem(DWORD timeout, IOItem* item) {
+  memset(item, 0, sizeof(*item));
+  ULONG_PTR key = 0;
+  OVERLAPPED* overlapped = NULL;
+  BOOL success;
+  {
+    AUTO_PROFILER_LABEL("MessagePumpForIO::GetIOItem::Wait", IDLE);
+#ifdef MOZ_GECKO_PROFILER
+    mozilla::Maybe<mozilla::AutoProfilerThreadSleep> profilerThreadSleep;
+    if (timeout != 0) {
+      profilerThreadSleep.emplace();
+    }
+#endif
+    success = GetQueuedCompletionStatus(port_.Get(), &item->bytes_transfered,
+                                        &key, &overlapped, timeout);
+  }
+  if (!success) {
+    if (!overlapped) return false;  // Nothing in the queue.
+    item->error = GetLastError();
+    item->bytes_transfered = 0;
+  }
+
+  item->handler = reinterpret_cast<IOHandler*>(key);
+  item->context = reinterpret_cast<IOContext*>(overlapped);
+  return true;
+}
+
+bool MessagePumpForIO::ProcessInternalIOItem(const IOItem& item) {
+  if (this == reinterpret_cast<MessagePumpForIO*>(item.context) &&
+      this == reinterpret_cast<MessagePumpForIO*>(item.handler)) {
+    // This is our internal completion.
+    DCHECK(!item.bytes_transfered);
+    InterlockedExchange(&have_work_, 0);
+    return true;
+  }
+  return false;
+}
+
+// Returns a completion item that was previously received.
+bool MessagePumpForIO::MatchCompletedIOItem(IOHandler* filter, IOItem* item) {
+  DCHECK(!completed_io_.empty());
+  for (std::list<IOItem>::iterator it = completed_io_.begin();
+       it != completed_io_.end(); ++it) {
+    if (!filter || it->handler == filter) {
+      *item = *it;
+      completed_io_.erase(it);
+      return true;
+    }
+  }
+  return false;
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/message_pump_win.h b/ipc/chromium/src/base/message_pump_win.h
new file mode 100644
index 0000000000..585a4d3ff5
--- /dev/null
+++ b/ipc/chromium/src/base/message_pump_win.h
@@ -0,0 +1,347 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_MESSAGE_PUMP_WIN_H_
+#define BASE_MESSAGE_PUMP_WIN_H_
+
+#include <windows.h>
+
+#include <list>
+
+#include "base/message_pump.h"
+#include "base/observer_list.h"
+#include "base/scoped_handle.h"
+#include "base/time.h"
+
+namespace base {
+
+// MessagePumpWin serves as the base for specialized versions of the MessagePump
+// for Windows. It provides basic functionality like handling of observers and
+// controlling the lifetime of the message pump.
+class MessagePumpWin : public MessagePump {
+ public:
+  // An Observer is an object that receives global notifications from the
+  // MessageLoop.
+  //
+  // NOTE: An Observer implementation should be extremely fast!
+  //
+  class Observer {
+   public:
+    virtual ~Observer() {}
+
+    // This method is called before processing a message.
+    // The message may be undefined in which case msg.message is 0
+    virtual void WillProcessMessage(const MSG& msg) = 0;
+
+    // This method is called when control returns from processing a UI message.
+    // The message may be undefined in which case msg.message is 0
+    virtual void DidProcessMessage(const MSG& msg) = 0;
+  };
+
+  // Dispatcher is used during a nested invocation of Run to dispatch events.
+  // If Run is invoked with a non-NULL Dispatcher, MessageLoop does not
+  // dispatch events (or invoke TranslateMessage), rather every message is
+  // passed to Dispatcher's Dispatch method for dispatch. It is up to the
+  // Dispatcher to dispatch, or not, the event.
+  //
+  // The nested loop is exited by either posting a quit, or returning false
+  // from Dispatch.
+  class Dispatcher {
+   public:
+    virtual ~Dispatcher() {}
+    // Dispatches the event. If true is returned processing continues as
+    // normal. If false is returned, the nested loop exits immediately.
+    virtual bool Dispatch(const MSG& msg) = 0;
+  };
+
+  MessagePumpWin() : have_work_(0), state_(NULL) {}
+  virtual ~MessagePumpWin() {}
+
+  // Add an Observer, which will start receiving notifications immediately.
+  void AddObserver(Observer* observer);
+
+  // Remove an Observer.  It is safe to call this method while an Observer is
+  // receiving a notification callback.
+  void RemoveObserver(Observer* observer);
+
+  // Give a chance to code processing additional messages to notify the
+  // message loop observers that another message has been processed.
+  void WillProcessMessage(const MSG& msg);
+  void DidProcessMessage(const MSG& msg);
+
+  // Like MessagePump::Run, but MSG objects are routed through dispatcher.
+  void RunWithDispatcher(Delegate* delegate, Dispatcher* dispatcher);
+
+  // MessagePump methods:
+  virtual void Run(Delegate* delegate) { RunWithDispatcher(delegate, NULL); }
+  virtual void Quit();
+
+ protected:
+  struct RunState {
+    Delegate* delegate;
+    Dispatcher* dispatcher;
+
+    // Used to flag that the current Run() invocation should return ASAP.
+    bool should_quit;
+
+    // Used to count how many Run() invocations are on the stack.
+    int run_depth;
+  };
+
+  virtual void DoRunLoop() = 0;
+  int GetCurrentDelay() const;
+
+  ObserverList<Observer> observers_;
+
+  // The time at which delayed work should run.
+  TimeTicks delayed_work_time_;
+
+  // A boolean value used to indicate if there is a kMsgDoWork message pending
+  // in the Windows Message queue.  There is at most one such message, and it
+  // can drive execution of tasks when a native message pump is running.
+  LONG have_work_;
+
+  // State for the current invocation of Run.
+  RunState* state_;
+};
+
+//-----------------------------------------------------------------------------
+// MessagePumpForUI extends MessagePumpWin with methods that are particular to a
+// MessageLoop instantiated with TYPE_UI.
+//
+// MessagePumpForUI implements a "traditional" Windows message pump. It contains
+// a nearly infinite loop that peeks out messages, and then dispatches them.
+// Intermixed with those peeks are callouts to DoWork for pending tasks, and
+// DoDelayedWork for pending timers. When there are no events to be serviced,
+// this pump goes into a wait state. In most cases, this message pump handles
+// all processing.
+//
+// However, when a task, or windows event, invokes on the stack a native dialog
+// box or such, that window typically provides a bare bones (native?) message
+// pump.  That bare-bones message pump generally supports little more than a
+// peek of the Windows message queue, followed by a dispatch of the peeked
+// message.  MessageLoop extends that bare-bones message pump to also service
+// Tasks, at the cost of some complexity.
+//
+// The basic structure of the extension (refered to as a sub-pump) is that a
+// special message, kMsgHaveWork, is repeatedly injected into the Windows
+// Message queue.  Each time the kMsgHaveWork message is peeked, checks are
+// made for an extended set of events, including the availability of Tasks to
+// run.
+//
+// After running a task, the special message kMsgHaveWork is again posted to
+// the Windows Message queue, ensuring a future time slice for processing a
+// future event.  To prevent flooding the Windows Message queue, care is taken
+// to be sure that at most one kMsgHaveWork message is EVER pending in the
+// Window's Message queue.
+//
+// There are a few additional complexities in this system where, when there are
+// no Tasks to run, this otherwise infinite stream of messages which drives the
+// sub-pump is halted.  The pump is automatically re-started when Tasks are
+// queued.
+//
+// A second complexity is that the presence of this stream of posted tasks may
+// prevent a bare-bones message pump from ever peeking a WM_PAINT or WM_TIMER.
+// Such paint and timer events always give priority to a posted message, such as
+// kMsgHaveWork messages.  As a result, care is taken to do some peeking in
+// between the posting of each kMsgHaveWork message (i.e., after kMsgHaveWork
+// is peeked, and before a replacement kMsgHaveWork is posted).
+//
+// NOTE: Although it may seem odd that messages are used to start and stop this
+// flow (as opposed to signaling objects, etc.), it should be understood that
+// the native message pump will *only* respond to messages.  As a result, it is
+// an excellent choice.  It is also helpful that the starter messages that are
+// placed in the queue when new task arrive also awakens DoRunLoop.
+//
+class MessagePumpForUI : public MessagePumpWin {
+ public:
+  MessagePumpForUI();
+  virtual ~MessagePumpForUI();
+
+  // MessagePump methods:
+  virtual void ScheduleWork();
+  virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time);
+
+  // Applications can call this to encourage us to process all pending WM_PAINT
+  // messages.  This method will process all paint messages the Windows Message
+  // queue can provide, up to some fixed number (to avoid any infinite loops).
+  void PumpOutPendingPaintMessages();
+
+ protected:
+  virtual void DoRunLoop();
+
+  bool ProcessNextWindowsMessage();
+  void InitMessageWnd();
+  void WaitForWork();
+  void HandleWorkMessage();
+  void HandleTimerMessage();
+  bool ProcessMessageHelper(const MSG& msg);
+  bool ProcessPumpReplacementMessage();
+
+  // A hidden message-only window.
+  HWND message_hwnd_;
+
+ private:
+  static LRESULT CALLBACK WndProcThunk(HWND hwnd, UINT message, WPARAM wparam,
+                                       LPARAM lparam);
+};
+
+//-----------------------------------------------------------------------------
+// MessagePumpForIO extends MessagePumpWin with methods that are particular to a
+// MessageLoop instantiated with TYPE_IO. This version of MessagePump does not
+// deal with Windows mesagges, and instead has a Run loop based on Completion
+// Ports so it is better suited for IO operations.
+//
+class MessagePumpForIO : public MessagePumpWin {
+ public:
+  struct IOContext;
+
+  // Clients interested in receiving OS notifications when asynchronous IO
+  // operations complete should implement this interface and register themselves
+  // with the message pump.
+  //
+  // Typical use #1:
+  //   // Use only when there are no user's buffers involved on the actual IO,
+  //   // so that all the cleanup can be done by the message pump.
+  //   class MyFile : public IOHandler {
+  //     MyFile() {
+  //       ...
+  //       context_ = new IOContext;
+  //       context_->handler = this;
+  //       message_pump->RegisterIOHandler(file_, this);
+  //     }
+  //     ~MyFile() {
+  //       if (pending_) {
+  //         // By setting the handler to NULL, we're asking for this context
+  //         // to be deleted when received, without calling back to us.
+  //         context_->handler = NULL;
+  //       } else {
+  //         delete context_;
+  //      }
+  //     }
+  //     virtual void OnIOCompleted(IOContext* context, DWORD bytes_transfered,
+  //                                DWORD error) {
+  //         pending_ = false;
+  //     }
+  //     void DoSomeIo() {
+  //       ...
+  //       // The only buffer required for this operation is the overlapped
+  //       // structure.
+  //       ConnectNamedPipe(file_, &context_->overlapped);
+  //       pending_ = true;
+  //     }
+  //     bool pending_;
+  //     IOContext* context_;
+  //     HANDLE file_;
+  //   };
+  //
+  // Typical use #2:
+  //   class MyFile : public IOHandler {
+  //     MyFile() {
+  //       ...
+  //       message_pump->RegisterIOHandler(file_, this);
+  //     }
+  //     // Plus some code to make sure that this destructor is not called
+  //     // while there are pending IO operations.
+  //     ~MyFile() {
+  //     }
+  //     virtual void OnIOCompleted(IOContext* context, DWORD bytes_transfered,
+  //                                DWORD error) {
+  //       ...
+  //       delete context;
+  //     }
+  //     void DoSomeIo() {
+  //       ...
+  //       IOContext* context = new IOContext;
+  //       // This is not used for anything. It just prevents the context from
+  //       // being considered "abandoned".
+  //       context->handler = this;
+  //       ReadFile(file_, buffer, num_bytes, &read, &context->overlapped);
+  //     }
+  //     HANDLE file_;
+  //   };
+  //
+  // Typical use #3:
+  // Same as the previous example, except that in order to deal with the
+  // requirement stated for the destructor, the class calls WaitForIOCompletion
+  // from the destructor to block until all IO finishes.
+  //     ~MyFile() {
+  //       while(pending_)
+  //         message_pump->WaitForIOCompletion(INFINITE, this);
+  //     }
+  //
+  class IOHandler {
+   public:
+    virtual ~IOHandler() {}
+    // This will be called once the pending IO operation associated with
+    // |context| completes. |error| is the Win32 error code of the IO operation
+    // (ERROR_SUCCESS if there was no error). |bytes_transfered| will be zero
+    // on error.
+    virtual void OnIOCompleted(IOContext* context, DWORD bytes_transfered,
+                               DWORD error) = 0;
+  };
+
+  // The extended context that should be used as the base structure on every
+  // overlapped IO operation. |handler| must be set to the registered IOHandler
+  // for the given file when the operation is started, and it can be set to NULL
+  // before the operation completes to indicate that the handler should not be
+  // called anymore, and instead, the IOContext should be deleted when the OS
+  // notifies the completion of this operation. Please remember that any buffers
+  // involved with an IO operation should be around until the callback is
+  // received, so this technique can only be used for IO that do not involve
+  // additional buffers (other than the overlapped structure itself).
+  struct IOContext {
+    OVERLAPPED overlapped;
+    IOHandler* handler;
+  };
+
+  MessagePumpForIO();
+  virtual ~MessagePumpForIO() {}
+
+  // MessagePump methods:
+  virtual void ScheduleWork();
+  virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time);
+
+  // Register the handler to be used when asynchronous IO for the given file
+  // completes. The registration persists as long as |file_handle| is valid, so
+  // |handler| must be valid as long as there is pending IO for the given file.
+  void RegisterIOHandler(HANDLE file_handle, IOHandler* handler);
+
+  // Waits for the next IO completion that should be processed by |filter|, for
+  // up to |timeout| milliseconds. Return true if any IO operation completed,
+  // regardless of the involved handler, and false if the timeout expired. If
+  // the completion port received any message and the involved IO handler
+  // matches |filter|, the callback is called before returning from this code;
+  // if the handler is not the one that we are looking for, the callback will
+  // be postponed for another time, so reentrancy problems can be avoided.
+  // External use of this method should be reserved for the rare case when the
+  // caller is willing to allow pausing regular task dispatching on this thread.
+  bool WaitForIOCompletion(DWORD timeout, IOHandler* filter);
+
+ private:
+  struct IOItem {
+    IOHandler* handler;
+    IOContext* context;
+    DWORD bytes_transfered;
+    DWORD error;
+  };
+
+  virtual void DoRunLoop();
+  void WaitForWork();
+  bool MatchCompletedIOItem(IOHandler* filter, IOItem* item);
+  bool GetIOItem(DWORD timeout, IOItem* item);
+  bool ProcessInternalIOItem(const IOItem& item);
+
+  // The completion port associated with this thread.
+  ScopedHandle port_;
+  // This list will be empty almost always. It stores IO completions that have
+  // not been delivered yet because somebody was doing cleanup.
+  std::list<IOItem> completed_io_;
+};
+
+}  // namespace base
+
+#endif  // BASE_MESSAGE_PUMP_WIN_H_
diff --git a/ipc/chromium/src/base/object_watcher.cc b/ipc/chromium/src/base/object_watcher.cc
new file mode 100644
index 0000000000..b749829a0e
--- /dev/null
+++ b/ipc/chromium/src/base/object_watcher.cc
@@ -0,0 +1,135 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/object_watcher.h"
+
+#include "base/logging.h"
+
+namespace base {
+
+//-----------------------------------------------------------------------------
+
+class ObjectWatcher::Watch : public mozilla::Runnable {
+ public:
+  ObjectWatcher* watcher;    // The associated ObjectWatcher instance
+  HANDLE object;             // The object being watched
+  HANDLE wait_object;        // Returned by RegisterWaitForSingleObject
+  MessageLoop* origin_loop;  // Used to get back to the origin thread
+  Delegate* delegate;        // Delegate to notify when signaled
+  bool did_signal;           // DoneWaiting was called
+
+  Watch() : mozilla::Runnable("ObjectWatcher::Watch") {}
+
+  NS_IMETHOD Run() override {
+    // The watcher may have already been torn down, in which case we need to
+    // just get out of dodge.
+    if (!watcher) return NS_OK;
+
+    DCHECK(did_signal);
+    watcher->StopWatching();
+
+    delegate->OnObjectSignaled(object);
+
+    return NS_OK;
+  }
+};
+
+//-----------------------------------------------------------------------------
+
+ObjectWatcher::ObjectWatcher() : watch_(nullptr) {}
+
+ObjectWatcher::~ObjectWatcher() { StopWatching(); }
+
+bool ObjectWatcher::StartWatching(HANDLE object, Delegate* delegate) {
+  if (watch_) {
+    NOTREACHED() << "Already watching an object";
+    return false;
+  }
+
+  RefPtr<Watch> watch = new Watch;
+  watch->watcher = this;
+  watch->object = object;
+  watch->origin_loop = MessageLoop::current();
+  watch->delegate = delegate;
+  watch->did_signal = false;
+
+  // Since our job is to just notice when an object is signaled and report the
+  // result back to this thread, we can just run on a Windows wait thread.
+  DWORD wait_flags = WT_EXECUTEDEFAULT | WT_EXECUTEONLYONCE;
+
+  if (!RegisterWaitForSingleObject(&watch->wait_object, object, DoneWaiting,
+                                   watch.get(), INFINITE, wait_flags)) {
+    NOTREACHED() << "RegisterWaitForSingleObject failed: " << GetLastError();
+    return false;
+  }
+
+  watch_ = watch.forget();
+
+  // We need to know if the current message loop is going away so we can
+  // prevent the wait thread from trying to access a dead message loop.
+  MessageLoop::current()->AddDestructionObserver(this);
+  return true;
+}
+
+bool ObjectWatcher::StopWatching() {
+  if (!watch_) return false;
+
+  // Make sure ObjectWatcher is used in a single-threaded fashion.
+  DCHECK(watch_->origin_loop == MessageLoop::current());
+
+  // If DoneWaiting is in progress, we wait for it to finish.  We know whether
+  // DoneWaiting happened or not by inspecting the did_signal flag.
+  if (!UnregisterWaitEx(watch_->wait_object, INVALID_HANDLE_VALUE)) {
+    NOTREACHED() << "UnregisterWaitEx failed: " << GetLastError();
+    return false;
+  }
+
+  // Make sure that we see any mutation to did_signal.  This should be a no-op
+  // since we expect that UnregisterWaitEx resulted in a memory barrier, but
+  // just to be sure, we're going to be explicit.
+  MemoryBarrier();
+
+  // If the watch has been posted, then we need to make sure it knows not to do
+  // anything once it is run.
+  watch_->watcher = NULL;
+
+  watch_ = nullptr;
+
+  MessageLoop::current()->RemoveDestructionObserver(this);
+  return true;
+}
+
+HANDLE ObjectWatcher::GetWatchedObject() {
+  if (!watch_) return NULL;
+
+  return watch_->object;
+}
+
+// static
+void CALLBACK ObjectWatcher::DoneWaiting(void* param, BOOLEAN timed_out) {
+  DCHECK(!timed_out);
+
+  Watch* watch = static_cast<Watch*>(param);
+  RefPtr<Watch> addrefedWatch = watch;
+
+  // Record that we ran this function.
+  watch->did_signal = true;
+
+  // We rely on the locking in PostTask() to ensure that a memory barrier is
+  // provided, which in turn ensures our change to did_signal can be observed
+  // on the target thread.
+  if (watch->origin_loop->IsAcceptingTasks()) {
+    watch->origin_loop->PostTask(addrefedWatch.forget());
+  }
+}
+
+void ObjectWatcher::WillDestroyCurrentMessageLoop() {
+  // Need to shutdown the watch so that we don't try to access the MessageLoop
+  // after this point.
+  StopWatching();
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/object_watcher.h b/ipc/chromium/src/base/object_watcher.h
new file mode 100644
index 0000000000..1e1b27aa46
--- /dev/null
+++ b/ipc/chromium/src/base/object_watcher.h
@@ -0,0 +1,115 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_OBJECT_WATCHER_H_
+#define BASE_OBJECT_WATCHER_H_
+
+#include <windows.h>
+#ifdef GetClassName
+#  undef GetClassName
+#endif
+
+#include "base/message_loop.h"
+
+namespace base {
+
+// A class that provides a means to asynchronously wait for a Windows object to
+// become signaled.  It is an abstraction around RegisterWaitForSingleObject
+// that provides a notification callback, OnObjectSignaled, that runs back on
+// the origin thread (i.e., the thread that called StartWatching).
+//
+// This class acts like a smart pointer such that when it goes out-of-scope,
+// UnregisterWaitEx is automatically called, and any in-flight notification is
+// suppressed.
+//
+// Typical usage:
+//
+// ```
+//   class MyClass : public base::ObjectWatcher::Delegate {
+//    public:
+//     void DoStuffWhenSignaled(HANDLE object) {
+//       watcher_.StartWatching(object, this);
+//     }
+//     virtual void OnObjectSignaled(HANDLE object) {
+//       // OK, time to do stuff!
+//     }
+//    private:
+//     base::ObjectWatcher watcher_;
+//   };
+// ```
+//
+// In the above example, MyClass wants to "do stuff" when object becomes
+// signaled.  ObjectWatcher makes this task easy.  When MyClass goes out of
+// scope, the watcher_ will be destroyed, and there is no need to worry about
+// OnObjectSignaled being called on a deleted MyClass pointer.  Easy!
+//
+//////
+//
+// Mozilla/Gecko addendum:
+//
+// An undocumented (but runtime-asserted) requirement for the above is that
+// `MyClass` must be strictly thread-affine. In particular, `StartWatching()`
+// and `StopWatching()` -- including the implicit `StopWatching()` call in
+// `~ObjectWatcher()` -- must always be called on the same thread and from
+// within the same `MessageLoop`.
+//
+// (If this did not hold, `OnObjectSignaled()` might be called on one thread
+// while `MyClass` is in the middle of being destroyed on another.)
+//
+// This condition cannot be guaranteed for potentially-asynchronously-destroyed
+// classes, nor for their owned or shared subobjects, nor for anything which
+// might be sent to a non-thread-affine task queue.
+//
+class ObjectWatcher : public MessageLoop::DestructionObserver {
+ public:
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+    // Called from the MessageLoop when a signaled object is detected.  To
+    // continue watching the object, AddWatch must be called again.
+    virtual void OnObjectSignaled(HANDLE object) = 0;
+  };
+
+  ObjectWatcher();
+  ~ObjectWatcher();
+
+  // When the object is signaled, the given delegate is notified on the thread
+  // where StartWatching is called.  The ObjectWatcher is not responsible for
+  // deleting the delegate.
+  //
+  // Returns true if the watch was started.  Otherwise, false is returned.
+  //
+  bool StartWatching(HANDLE object, Delegate* delegate);
+
+  // Stops watching.  Does nothing if the watch has already completed.  If the
+  // watch is still active, then it is canceled, and the associated delegate is
+  // not notified.
+  //
+  // Returns true if the watch was canceled.  Otherwise, false is returned.
+  //
+  bool StopWatching();
+
+  // Returns the handle of the object being watched, or NULL if the object
+  // watcher is stopped.
+  HANDLE GetWatchedObject();
+
+ private:
+  // Called on a background thread when done waiting.
+  static void CALLBACK DoneWaiting(void* param, BOOLEAN timed_out);
+
+  // MessageLoop::DestructionObserver implementation:
+  virtual void WillDestroyCurrentMessageLoop();
+
+  // Internal state.
+  class Watch;
+  RefPtr<Watch> watch_;
+
+  DISALLOW_COPY_AND_ASSIGN(ObjectWatcher);
+};
+
+}  // namespace base
+
+#endif  // BASE_OBJECT_WATCHER_H_
diff --git a/ipc/chromium/src/base/observer_list.h b/ipc/chromium/src/base/observer_list.h
new file mode 100644
index 0000000000..52b88329eb
--- /dev/null
+++ b/ipc/chromium/src/base/observer_list.h
@@ -0,0 +1,180 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_OBSERVER_LIST_H__
+#define BASE_OBSERVER_LIST_H__
+
+#include <algorithm>
+#include <limits>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+
+#if defined(ANDROID) && defined(_STLP_STD_NAME)
+using _STLP_STD_NAME::find;
+#endif
+
+namespace base {
+
+///////////////////////////////////////////////////////////////////////////////
+//
+// OVERVIEW:
+//
+//   A container for a list of observers.  Unlike a normal STL vector or list,
+//   this container can be modified during iteration without invalidating the
+//   iterator.  So, it safely handles the case of an observer removing itself
+//   or other observers from the list while observers are being notified.
+//
+// TYPICAL USAGE:
+//
+//   class MyWidget {
+//    public:
+//     ...
+//
+//     class Observer {
+//      public:
+//       virtual void OnFoo(MyWidget* w) = 0;
+//       virtual void OnBar(MyWidget* w, int x, int y) = 0;
+//     };
+//
+//     void AddObserver(Observer* obs) {
+//       observer_list_.AddObserver(obs);
+//     }
+//
+//     void RemoveObserver(Observer* obs) {
+//       observer_list_.RemoveObserver(obs);
+//     }
+//
+//     void NotifyFoo() {
+//       FOR_EACH_OBSERVER(Observer, observer_list_, OnFoo(this));
+//     }
+//
+//     void NotifyBar(int x, int y) {
+//       FOR_EACH_OBSERVER(Observer, observer_list_, OnBar(this, x, y));
+//     }
+//
+//    private:
+//     ObserverList<Observer> observer_list_;
+//   };
+//
+//
+///////////////////////////////////////////////////////////////////////////////
+
+template <class ObserverType, bool check_empty = false>
+class ObserverList {
+ public:
+  // Enumeration of which observers are notified.
+  enum NotificationType {
+    // Specifies that any observers added during notification are notified.
+    // This is the default type if non type is provided to the constructor.
+    NOTIFY_ALL,
+
+    // Specifies that observers added while sending out notification are not
+    // notified.
+    NOTIFY_EXISTING_ONLY
+  };
+
+  ObserverList() : notify_depth_(0), type_(NOTIFY_ALL) {}
+  explicit ObserverList(NotificationType type)
+      : notify_depth_(0), type_(type) {}
+  ~ObserverList() {
+    // When check_empty is true, assert that the list is empty on destruction.
+    if (check_empty) {
+      Compact();
+      DCHECK_EQ(observers_.size(), 0U);
+    }
+  }
+
+  // Add an observer to the list.
+  void AddObserver(ObserverType* obs) {
+    DCHECK(find(observers_.begin(), observers_.end(), obs) == observers_.end())
+        << "Observers can only be added once!";
+    observers_.push_back(obs);
+  }
+
+  // Remove an observer from the list.
+  void RemoveObserver(ObserverType* obs) {
+    typename ListType::iterator it =
+        std::find(observers_.begin(), observers_.end(), obs);
+    if (it != observers_.end()) {
+      if (notify_depth_) {
+        *it = 0;
+      } else {
+        observers_.erase(it);
+      }
+    }
+  }
+
+  size_t size() const { return observers_.size(); }
+
+  ObserverType* GetElementAt(int index) const { return observers_[index]; }
+
+  // An iterator class that can be used to access the list of observers.  See
+  // also the FOREACH_OBSERVER macro defined below.
+  class Iterator {
+   public:
+    explicit Iterator(const ObserverList<ObserverType>& list)
+        : list_(list),
+          index_(0),
+          max_index_(list.type_ == NOTIFY_ALL
+                         ? std::numeric_limits<size_t>::max()
+                         : list.observers_.size()) {
+      ++list_.notify_depth_;
+    }
+
+    ~Iterator() {
+      if (--list_.notify_depth_ == 0) list_.Compact();
+    }
+
+    ObserverType* GetNext() {
+      ListType& observers = list_.observers_;
+      // Advance if the current element is null
+      size_t max_index = std::min(max_index_, observers.size());
+      while (index_ < max_index && !observers[index_]) ++index_;
+      return index_ < max_index ? observers[index_++] : NULL;
+    }
+
+   private:
+    const ObserverList<ObserverType>& list_;
+    size_t index_;
+    size_t max_index_;
+  };
+
+ private:
+  typedef std::vector<ObserverType*> ListType;
+
+  void Compact() const {
+    typename ListType::iterator it = observers_.begin();
+    while (it != observers_.end()) {
+      if (*it) {
+        ++it;
+      } else {
+        it = observers_.erase(it);
+      }
+    }
+  }
+
+  // These are marked mutable to facilitate having NotifyAll be const.
+  mutable ListType observers_;
+  mutable int notify_depth_;
+  NotificationType type_;
+
+  friend class ObserverList::Iterator;
+
+  DISALLOW_EVIL_CONSTRUCTORS(ObserverList);
+};
+
+}  // namespace base
+
+#define FOR_EACH_OBSERVER(ObserverType, observer_list, func)      \
+  do {                                                            \
+    base::ObserverList<ObserverType>::Iterator it(observer_list); \
+    ObserverType* obs;                                            \
+    while ((obs = it.GetNext()) != NULL) obs->func;               \
+  } while (0)
+
+#endif  // BASE_OBSERVER_LIST_H__
diff --git a/ipc/chromium/src/base/pickle.cc b/ipc/chromium/src/base/pickle.cc
new file mode 100644
index 0000000000..e2a1be77b5
--- /dev/null
+++ b/ipc/chromium/src/base/pickle.cc
@@ -0,0 +1,619 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/pickle.h"
+
+#include "mozilla/Alignment.h"
+#include "mozilla/CheckedInt.h"
+#include "mozilla/EndianUtils.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/ipc/ProtocolUtils.h"
+
+#include <stdlib.h>
+
+#include <limits>
+#include <string>
+#include <algorithm>
+#include <type_traits>
+
+#include "nsDebug.h"
+
+//------------------------------------------------------------------------------
+
+static_assert(MOZ_ALIGNOF(Pickle::memberAlignmentType) >= MOZ_ALIGNOF(uint32_t),
+              "Insufficient alignment");
+
+static const uint32_t kHeaderSegmentCapacity = 64;
+
+static const uint32_t kDefaultSegmentCapacity = 4096;
+
+static const char kBytePaddingMarker = char(0xbf);
+
+namespace {
+
+// We want to copy data to our payload as efficiently as possible.
+// memcpy fits the bill for copying, but not all compilers or
+// architectures support inlining memcpy from void*, which has unknown
+// static alignment.  However, we know that all the members of our
+// payload will be aligned on memberAlignmentType boundaries.  We
+// therefore use that knowledge to construct a copier that will copy
+// efficiently (via standard C++ assignment mechanisms) if the datatype
+// needs that alignment or less, and memcpy otherwise.  (The compiler
+// may still inline memcpy, of course.)
+
+template <typename T, size_t size, bool hasSufficientAlignment>
+struct Copier {
+  static void Copy(T* dest, const char* iter) { memcpy(dest, iter, sizeof(T)); }
+};
+
+// Copying 64-bit quantities happens often enough and can easily be made
+// worthwhile on 32-bit platforms, so handle it specially.  Only do it
+// if 64-bit types aren't sufficiently aligned; the alignment
+// requirements for them vary between 32-bit platforms.
+#ifndef HAVE_64BIT_BUILD
+template <typename T>
+struct Copier<T, sizeof(uint64_t), false> {
+  static void Copy(T* dest, const char* iter) {
+#  if MOZ_LITTLE_ENDIAN
+    static const int loIndex = 0, hiIndex = 1;
+#  else
+    static const int loIndex = 1, hiIndex = 0;
+#  endif
+    static_assert(MOZ_ALIGNOF(uint32_t*) == MOZ_ALIGNOF(void*),
+                  "Pointers have different alignments");
+    const uint32_t* src = reinterpret_cast<const uint32_t*>(iter);
+    uint32_t* uint32dest = reinterpret_cast<uint32_t*>(dest);
+    uint32dest[loIndex] = src[loIndex];
+    uint32dest[hiIndex] = src[hiIndex];
+  }
+};
+#endif
+
+template <typename T, size_t size>
+struct Copier<T, size, true> {
+  static void Copy(T* dest, const char* iter) {
+    // The pointer ought to be properly aligned.
+    DCHECK_EQ((((uintptr_t)iter) & (MOZ_ALIGNOF(T) - 1)), 0);
+    *dest = *reinterpret_cast<const T*>(iter);
+  }
+};
+
+}  // anonymous namespace
+
+PickleIterator::PickleIterator(const Pickle& pickle)
+    : iter_(pickle.buffers_.Iter()) {
+  iter_.Advance(pickle.buffers_, pickle.header_size_);
+}
+
+template <typename T>
+void PickleIterator::CopyInto(T* dest) {
+  static_assert(std::is_trivially_copyable<T>::value,
+                "Copied type must be a POD type");
+  Copier<T, sizeof(T),
+         (MOZ_ALIGNOF(T) <=
+          sizeof(Pickle::memberAlignmentType))>::Copy(dest, iter_.Data());
+}
+
+bool Pickle::IteratorHasRoomFor(const PickleIterator& iter,
+                                uint32_t len) const {
+  // Make sure we don't get into trouble where AlignInt(len) == 0.
+  MOZ_RELEASE_ASSERT(len < 64);
+
+  return iter.iter_.HasRoomFor(AlignInt(len));
+}
+
+bool Pickle::HasBytesAvailable(const PickleIterator* iter, uint32_t len) const {
+  return iter->iter_.HasBytesAvailable(buffers_, len);
+}
+
+void Pickle::UpdateIter(PickleIterator* iter, uint32_t bytes) const {
+  // Make sure we don't get into trouble where AlignInt(bytes) == 0.
+  MOZ_RELEASE_ASSERT(bytes < 64);
+
+  iter->iter_.Advance(buffers_, AlignInt(bytes));
+}
+
+// Payload is sizeof(Pickle::memberAlignmentType) aligned.
+
+Pickle::Pickle(uint32_t header_size, size_t segment_capacity)
+    : buffers_(AlignInt(header_size),
+               segment_capacity ? segment_capacity : kHeaderSegmentCapacity,
+               segment_capacity ? segment_capacity : kDefaultSegmentCapacity),
+      header_(nullptr),
+      header_size_(AlignInt(header_size)) {
+  DCHECK(static_cast<memberAlignmentType>(header_size) >= sizeof(Header));
+  DCHECK(header_size_ <= kHeaderSegmentCapacity);
+  header_ = reinterpret_cast<Header*>(buffers_.Start());
+  header_->payload_size = 0;
+}
+
+Pickle::Pickle(uint32_t header_size, const char* data, uint32_t length)
+    : buffers_(length, AlignCapacity(length), kDefaultSegmentCapacity),
+      header_(nullptr),
+      header_size_(AlignInt(header_size)) {
+  DCHECK(static_cast<memberAlignmentType>(header_size) >= sizeof(Header));
+  DCHECK(header_size <= kHeaderSegmentCapacity);
+  MOZ_RELEASE_ASSERT(header_size <= length);
+
+  header_ = reinterpret_cast<Header*>(buffers_.Start());
+  memcpy(header_, data, length);
+}
+
+Pickle::Pickle(Pickle&& other)
+    : buffers_(std::move(other.buffers_)),
+      header_(other.header_),
+      header_size_(other.header_size_) {
+  other.header_ = nullptr;
+}
+
+Pickle::~Pickle() {}
+
+Pickle& Pickle::operator=(Pickle&& other) {
+  BufferList tmp = std::move(other.buffers_);
+  other.buffers_ = std::move(buffers_);
+  buffers_ = std::move(tmp);
+
+  // std::swap(buffers_, other.buffers_);
+  std::swap(header_, other.header_);
+  std::swap(header_size_, other.header_size_);
+  return *this;
+}
+
+void Pickle::CopyFrom(const Pickle& other) {
+  MOZ_ALWAYS_TRUE(buffers_.CopyFrom(other.buffers_));
+  MOZ_ASSERT(other.header_ ==
+             reinterpret_cast<const Header*>(other.buffers_.Start()));
+
+  header_ = reinterpret_cast<Header*>(buffers_.Start());
+  header_size_ = other.header_size_;
+}
+
+bool Pickle::ReadBool(PickleIterator* iter, bool* result) const {
+  DCHECK(iter);
+
+  int tmp;
+  if (!ReadInt(iter, &tmp)) return false;
+  DCHECK(0 == tmp || 1 == tmp);
+  *result = tmp ? true : false;
+  return true;
+}
+
+bool Pickle::ReadInt16(PickleIterator* iter, int16_t* result) const {
+  DCHECK(iter);
+
+  if (!IteratorHasRoomFor(*iter, sizeof(*result)))
+    return ReadBytesInto(iter, result, sizeof(*result));
+
+  iter->CopyInto(result);
+
+  UpdateIter(iter, sizeof(*result));
+  return true;
+}
+
+bool Pickle::ReadUInt16(PickleIterator* iter, uint16_t* result) const {
+  DCHECK(iter);
+
+  if (!IteratorHasRoomFor(*iter, sizeof(*result)))
+    return ReadBytesInto(iter, result, sizeof(*result));
+
+  iter->CopyInto(result);
+
+  UpdateIter(iter, sizeof(*result));
+  return true;
+}
+
+bool Pickle::ReadInt(PickleIterator* iter, int* result) const {
+  DCHECK(iter);
+
+  if (!IteratorHasRoomFor(*iter, sizeof(*result)))
+    return ReadBytesInto(iter, result, sizeof(*result));
+
+  iter->CopyInto(result);
+
+  UpdateIter(iter, sizeof(*result));
+  return true;
+}
+
+// Always written as a 64-bit value since the size for this type can
+// differ between architectures.
+bool Pickle::ReadLong(PickleIterator* iter, long* result) const {
+  DCHECK(iter);
+
+  int64_t big_result = 0;
+  if (IteratorHasRoomFor(*iter, sizeof(big_result))) {
+    iter->CopyInto(&big_result);
+    UpdateIter(iter, sizeof(big_result));
+  } else {
+    if (!ReadBytesInto(iter, &big_result, sizeof(big_result))) {
+      return false;
+    }
+  }
+  DCHECK(big_result <= LONG_MAX && big_result >= LONG_MIN);
+  *result = static_cast<long>(big_result);
+
+  return true;
+}
+
+// Always written as a 64-bit value since the size for this type can
+// differ between architectures.
+bool Pickle::ReadULong(PickleIterator* iter, unsigned long* result) const {
+  DCHECK(iter);
+
+  uint64_t big_result = 0;
+  if (IteratorHasRoomFor(*iter, sizeof(big_result))) {
+    iter->CopyInto(&big_result);
+    UpdateIter(iter, sizeof(big_result));
+  } else {
+    if (!ReadBytesInto(iter, &big_result, sizeof(big_result))) {
+      return false;
+    }
+  }
+  DCHECK(big_result <= ULONG_MAX);
+  *result = static_cast<unsigned long>(big_result);
+
+  return true;
+}
+
+bool Pickle::ReadLength(PickleIterator* iter, int* result) const {
+  if (!ReadInt(iter, result)) return false;
+  return ((*result) >= 0);
+}
+
+bool Pickle::ReadInt32(PickleIterator* iter, int32_t* result) const {
+  DCHECK(iter);
+
+  if (!IteratorHasRoomFor(*iter, sizeof(*result)))
+    return ReadBytesInto(iter, result, sizeof(*result));
+
+  iter->CopyInto(result);
+
+  UpdateIter(iter, sizeof(*result));
+  return true;
+}
+
+bool Pickle::ReadUInt32(PickleIterator* iter, uint32_t* result) const {
+  DCHECK(iter);
+
+  if (!IteratorHasRoomFor(*iter, sizeof(*result)))
+    return ReadBytesInto(iter, result, sizeof(*result));
+
+  iter->CopyInto(result);
+
+  UpdateIter(iter, sizeof(*result));
+  return true;
+}
+
+bool Pickle::ReadInt64(PickleIterator* iter, int64_t* result) const {
+  DCHECK(iter);
+
+  if (!IteratorHasRoomFor(*iter, sizeof(*result)))
+    return ReadBytesInto(iter, result, sizeof(*result));
+
+  iter->CopyInto(result);
+
+  UpdateIter(iter, sizeof(*result));
+  return true;
+}
+
+bool Pickle::ReadUInt64(PickleIterator* iter, uint64_t* result) const {
+  DCHECK(iter);
+
+  if (!IteratorHasRoomFor(*iter, sizeof(*result)))
+    return ReadBytesInto(iter, result, sizeof(*result));
+
+  iter->CopyInto(result);
+
+  UpdateIter(iter, sizeof(*result));
+  return true;
+}
+
+bool Pickle::ReadDouble(PickleIterator* iter, double* result) const {
+  DCHECK(iter);
+
+  if (!IteratorHasRoomFor(*iter, sizeof(*result)))
+    return ReadBytesInto(iter, result, sizeof(*result));
+
+  iter->CopyInto(result);
+
+  UpdateIter(iter, sizeof(*result));
+  return true;
+}
+
+// Always written as a 64-bit value since the size for this type can
+// differ between architectures.
+bool Pickle::ReadIntPtr(PickleIterator* iter, intptr_t* result) const {
+  DCHECK(iter);
+
+  int64_t big_result = 0;
+  if (IteratorHasRoomFor(*iter, sizeof(big_result))) {
+    iter->CopyInto(&big_result);
+    UpdateIter(iter, sizeof(big_result));
+  } else {
+    if (!ReadBytesInto(iter, &big_result, sizeof(big_result))) {
+      return false;
+    }
+  }
+
+  DCHECK(big_result <= std::numeric_limits<intptr_t>::max() &&
+         big_result >= std::numeric_limits<intptr_t>::min());
+  *result = static_cast<intptr_t>(big_result);
+
+  return true;
+}
+
+bool Pickle::ReadUnsignedChar(PickleIterator* iter,
+                              unsigned char* result) const {
+  DCHECK(iter);
+
+  if (!IteratorHasRoomFor(*iter, sizeof(*result)))
+    return ReadBytesInto(iter, result, sizeof(*result));
+
+  iter->CopyInto(result);
+
+  UpdateIter(iter, sizeof(*result));
+  return true;
+}
+
+bool Pickle::ReadString(PickleIterator* iter, std::string* result) const {
+  DCHECK(iter);
+
+  int len;
+  if (!ReadLength(iter, &len)) return false;
+
+  auto chars = mozilla::MakeUnique<char[]>(len);
+  if (!ReadBytesInto(iter, chars.get(), len)) {
+    return false;
+  }
+  result->assign(chars.get(), len);
+
+  return true;
+}
+
+bool Pickle::ReadWString(PickleIterator* iter, std::wstring* result) const {
+  DCHECK(iter);
+
+  int len;
+  if (!ReadLength(iter, &len)) return false;
+  // Avoid integer multiplication overflow.
+  if (len > INT_MAX / static_cast<int>(sizeof(wchar_t))) return false;
+
+  auto chars = mozilla::MakeUnique<wchar_t[]>(len);
+  if (!ReadBytesInto(iter, chars.get(), len * sizeof(wchar_t))) {
+    return false;
+  }
+  result->assign(chars.get(), len);
+
+  return true;
+}
+
+bool Pickle::ReadBytesInto(PickleIterator* iter, void* data,
+                           uint32_t length) const {
+  if (AlignInt(length) < length) {
+    return false;
+  }
+
+  if (!buffers_.ReadBytes(iter->iter_, reinterpret_cast<char*>(data), length)) {
+    return false;
+  }
+
+  return iter->iter_.AdvanceAcrossSegments(buffers_, AlignInt(length) - length);
+}
+
+bool Pickle::IgnoreBytes(PickleIterator* iter, uint32_t length) const {
+  if (AlignInt(length) < length) {
+    return false;
+  }
+
+  return iter->iter_.AdvanceAcrossSegments(buffers_, AlignInt(length));
+}
+
+#ifdef MOZ_PICKLE_SENTINEL_CHECKING
+MOZ_NEVER_INLINE
+bool Pickle::ReadSentinel(PickleIterator* iter, uint32_t sentinel) const {
+  uint32_t found;
+  if (!ReadUInt32(iter, &found)) {
+    return false;
+  }
+  return found == sentinel;
+}
+
+bool Pickle::IgnoreSentinel(PickleIterator* iter) const {
+  uint32_t found;
+  return ReadUInt32(iter, &found);
+}
+
+bool Pickle::WriteSentinel(uint32_t sentinel) { return WriteUInt32(sentinel); }
+#endif
+
+void Pickle::EndRead(PickleIterator& iter, uint32_t ipcMsgType) const {
+  // FIXME: Deal with the footer somehow...
+  // DCHECK(iter.iter_.Done());
+}
+
+void Pickle::Truncate(PickleIterator* iter) {
+  size_t dropped = buffers_.Truncate(iter->iter_);
+  header_->payload_size -= dropped;
+}
+
+static const char kBytePaddingData[4] = {
+    kBytePaddingMarker,
+    kBytePaddingMarker,
+    kBytePaddingMarker,
+    kBytePaddingMarker,
+};
+
+static void WritePadding(Pickle::BufferList& buffers, uint32_t padding) {
+  MOZ_RELEASE_ASSERT(padding <= 4);
+  if (padding) {
+    MOZ_ALWAYS_TRUE(buffers.WriteBytes(kBytePaddingData, padding));
+  }
+}
+
+void Pickle::BeginWrite(uint32_t length) {
+  // write at an alignment-aligned offset from the beginning of the header
+  uint32_t offset = AlignInt(header_->payload_size);
+  uint32_t padding = (header_size_ + offset) % sizeof(memberAlignmentType);
+  uint32_t new_size = offset + padding + AlignInt(length);
+  MOZ_RELEASE_ASSERT(new_size >= header_->payload_size);
+
+  DCHECK(intptr_t(header_) % sizeof(memberAlignmentType) == 0);
+
+#ifdef ARCH_CPU_64_BITS
+  DCHECK_LE(length, std::numeric_limits<uint32_t>::max());
+#endif
+
+  WritePadding(buffers_, padding);
+
+  DCHECK((header_size_ + header_->payload_size + padding) %
+             sizeof(memberAlignmentType) ==
+         0);
+
+  header_->payload_size = new_size;
+}
+
+void Pickle::EndWrite(uint32_t length) {
+  uint32_t padding = AlignInt(length) - length;
+  WritePadding(buffers_, padding);
+}
+
+bool Pickle::WriteBool(bool value) { return WriteInt(value ? 1 : 0); }
+
+bool Pickle::WriteInt16(int16_t value) {
+  return WriteBytes(&value, sizeof(value));
+}
+
+bool Pickle::WriteUInt16(uint16_t value) {
+  return WriteBytes(&value, sizeof(value));
+}
+
+bool Pickle::WriteInt(int value) { return WriteBytes(&value, sizeof(value)); }
+
+bool Pickle::WriteLong(long value) {
+  // Always written as a 64-bit value since the size for this type can
+  // differ between architectures.
+  return WriteInt64(int64_t(value));
+}
+
+bool Pickle::WriteULong(unsigned long value) {
+  // Always written as a 64-bit value since the size for this type can
+  // differ between architectures.
+  return WriteUInt64(uint64_t(value));
+}
+
+bool Pickle::WriteInt32(int32_t value) {
+  return WriteBytes(&value, sizeof(value));
+}
+
+bool Pickle::WriteUInt32(uint32_t value) {
+  return WriteBytes(&value, sizeof(value));
+}
+
+bool Pickle::WriteInt64(int64_t value) {
+  return WriteBytes(&value, sizeof(value));
+}
+
+bool Pickle::WriteUInt64(uint64_t value) {
+  return WriteBytes(&value, sizeof(value));
+}
+
+bool Pickle::WriteDouble(double value) {
+  return WriteBytes(&value, sizeof(value));
+}
+
+bool Pickle::WriteIntPtr(intptr_t value) {
+  // Always written as a 64-bit value since the size for this type can
+  // differ between architectures.
+  return WriteInt64(int64_t(value));
+}
+
+bool Pickle::WriteUnsignedChar(unsigned char value) {
+  return WriteBytes(&value, sizeof(value));
+}
+
+bool Pickle::WriteBytesZeroCopy(void* data, uint32_t data_len,
+                                uint32_t capacity) {
+  BeginWrite(data_len);
+
+  uint32_t new_capacity = AlignInt(capacity);
+#ifndef MOZ_MEMORY
+  if (new_capacity > capacity) {
+    // If the buffer we were given is not large enough to contain padding
+    // after the data, reallocate it to make it so. When using jemalloc,
+    // we're guaranteed the buffer size is going to be at least 4-bytes
+    // aligned, so we skip realloc altogether. Even with other allocators,
+    // the realloc is likely not necessary, but we don't take chances.
+    // At least with ASan, it does matter to realloc to inform ASan we're
+    // going to use more data from the buffer (and let it actually realloc
+    // if it needs to).
+    data = realloc(data, new_capacity);
+  }
+#endif
+  buffers_.WriteBytesZeroCopy(reinterpret_cast<char*>(data), data_len,
+                              new_capacity);
+
+  EndWrite(data_len);
+  return true;
+}
+
+bool Pickle::WriteBytes(const void* data, uint32_t data_len) {
+  BeginWrite(data_len);
+
+  MOZ_ALWAYS_TRUE(
+      buffers_.WriteBytes(reinterpret_cast<const char*>(data), data_len));
+
+  EndWrite(data_len);
+  return true;
+}
+
+bool Pickle::WriteString(const std::string& value) {
+  if (!WriteInt(static_cast<int>(value.size()))) return false;
+
+  return WriteBytes(value.data(), static_cast<int>(value.size()));
+}
+
+bool Pickle::WriteWString(const std::wstring& value) {
+  if (!WriteInt(static_cast<int>(value.size()))) return false;
+
+  return WriteBytes(value.data(),
+                    static_cast<int>(value.size() * sizeof(wchar_t)));
+}
+
+bool Pickle::WriteData(const char* data, uint32_t length) {
+  return WriteInt(length) && WriteBytes(data, length);
+}
+
+void Pickle::InputBytes(const char* data, uint32_t length) {
+  MOZ_ALWAYS_TRUE(buffers_.WriteBytes(data, length));
+}
+
+int32_t* Pickle::GetInt32PtrForTest(uint32_t offset) {
+  size_t pos = buffers_.Size() - offset;
+  BufferList::IterImpl iter(buffers_);
+  MOZ_RELEASE_ASSERT(iter.AdvanceAcrossSegments(buffers_, pos));
+  return reinterpret_cast<int32_t*>(iter.Data());
+}
+
+// static
+uint32_t Pickle::MessageSize(uint32_t header_size, const char* start,
+                             const char* end) {
+  DCHECK(header_size == AlignInt(header_size));
+  DCHECK(header_size <=
+         static_cast<memberAlignmentType>(kHeaderSegmentCapacity));
+
+  if (end < start) return 0;
+  size_t length = static_cast<size_t>(end - start);
+  if (length < sizeof(Header)) return 0;
+
+  const Header* hdr = reinterpret_cast<const Header*>(start);
+  if (length < header_size) return 0;
+
+  mozilla::CheckedInt<uint32_t> sum(header_size);
+  sum += hdr->payload_size;
+
+  if (!sum.isValid()) return 0;
+
+  return sum.value();
+}
diff --git a/ipc/chromium/src/base/pickle.h b/ipc/chromium/src/base/pickle.h
new file mode 100644
index 0000000000..2f0fee6de7
--- /dev/null
+++ b/ipc/chromium/src/base/pickle.h
@@ -0,0 +1,271 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_PICKLE_H__
+#define BASE_PICKLE_H__
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "base/string16.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/BufferList.h"
+#include "mozilla/mozalloc.h"
+#include "mozilla/TimeStamp.h"
+#if !defined(FUZZING) && (!defined(RELEASE_OR_BETA) || defined(DEBUG))
+#  define MOZ_PICKLE_SENTINEL_CHECKING
+#endif
+class Pickle;
+class PickleIterator {
+ public:
+  explicit PickleIterator(const Pickle& pickle);
+
+ private:
+  friend class Pickle;
+
+  mozilla::BufferList<InfallibleAllocPolicy>::IterImpl iter_;
+
+  template <typename T>
+  void CopyInto(T* dest);
+};
+
+// This class provides facilities for basic binary value packing and unpacking.
+//
+// The Pickle class supports appending primitive values (ints, strings, etc.)
+// to a pickle instance.  The Pickle instance grows its internal memory buffer
+// dynamically to hold the sequence of primitive values.   The internal memory
+// buffer is exposed as the "data" of the Pickle.  This "data" can be passed
+// to a Pickle object to initialize it for reading.
+//
+// When reading from a Pickle object, it is important for the consumer to know
+// what value types to read and in what order to read them as the Pickle does
+// not keep track of the type of data written to it.
+//
+// The Pickle's data has a header which contains the size of the Pickle's
+// payload.  It can optionally support additional space in the header.  That
+// space is controlled by the header_size parameter passed to the Pickle
+// constructor.
+//
+class Pickle {
+ public:
+  ~Pickle();
+
+  Pickle() = delete;
+
+  // Initialize a Pickle object with the specified header size in bytes, which
+  // must be greater-than-or-equal-to sizeof(Pickle::Header).  The header size
+  // will be rounded up to ensure that the header size is 32bit-aligned.
+  explicit Pickle(uint32_t header_size, size_t segment_capacity = 0);
+
+  Pickle(uint32_t header_size, const char* data, uint32_t length);
+
+  Pickle(const Pickle& other) = delete;
+
+  Pickle(Pickle&& other);
+
+  // Performs a deep copy.
+  Pickle& operator=(const Pickle& other) = delete;
+
+  Pickle& operator=(Pickle&& other);
+
+  void CopyFrom(const Pickle& other);
+
+  // Returns the size of the Pickle's data.
+  uint32_t size() const { return header_size_ + header_->payload_size; }
+
+  typedef mozilla::BufferList<InfallibleAllocPolicy> BufferList;
+
+  const BufferList& Buffers() const { return buffers_; }
+
+  uint32_t CurrentSize() const { return buffers_.Size(); }
+
+  // Methods for reading the payload of the Pickle.  To read from the start of
+  // the Pickle, initialize *iter to NULL.  If successful, these methods return
+  // true.  Otherwise, false is returned to indicate that the result could not
+  // be extracted.
+  [[nodiscard]] bool ReadBool(PickleIterator* iter, bool* result) const;
+  [[nodiscard]] bool ReadInt16(PickleIterator* iter, int16_t* result) const;
+  [[nodiscard]] bool ReadUInt16(PickleIterator* iter, uint16_t* result) const;
+  [[nodiscard]] bool ReadShort(PickleIterator* iter, short* result) const;
+  [[nodiscard]] bool ReadInt(PickleIterator* iter, int* result) const;
+  [[nodiscard]] bool ReadLong(PickleIterator* iter, long* result) const;
+  [[nodiscard]] bool ReadULong(PickleIterator* iter,
+                               unsigned long* result) const;
+  [[nodiscard]] bool ReadInt32(PickleIterator* iter, int32_t* result) const;
+  [[nodiscard]] bool ReadUInt32(PickleIterator* iter, uint32_t* result) const;
+  [[nodiscard]] bool ReadInt64(PickleIterator* iter, int64_t* result) const;
+  [[nodiscard]] bool ReadUInt64(PickleIterator* iter, uint64_t* result) const;
+  [[nodiscard]] bool ReadDouble(PickleIterator* iter, double* result) const;
+  [[nodiscard]] bool ReadIntPtr(PickleIterator* iter, intptr_t* result) const;
+  [[nodiscard]] bool ReadUnsignedChar(PickleIterator* iter,
+                                      unsigned char* result) const;
+  [[nodiscard]] bool ReadString(PickleIterator* iter,
+                                std::string* result) const;
+  [[nodiscard]] bool ReadWString(PickleIterator* iter,
+                                 std::wstring* result) const;
+  [[nodiscard]] bool ReadBytesInto(PickleIterator* iter, void* data,
+                                   uint32_t length) const;
+
+  // Safer version of ReadInt() checks for the result not being negative.
+  // Use it for reading the object sizes.
+  [[nodiscard]] bool ReadLength(PickleIterator* iter, int* result) const;
+
+  [[nodiscard]] bool IgnoreBytes(PickleIterator* iter, uint32_t length) const;
+
+  [[nodiscard]] bool ReadSentinel(PickleIterator* iter, uint32_t sentinel) const
+#ifdef MOZ_PICKLE_SENTINEL_CHECKING
+      ;
+#else
+  {
+    return true;
+  }
+#endif
+
+  bool IgnoreSentinel(PickleIterator* iter) const
+#ifdef MOZ_PICKLE_SENTINEL_CHECKING
+      ;
+#else
+  {
+    return true;
+  }
+#endif
+
+  // NOTE: The message type optional parameter should _only_ be called from
+  // generated IPDL code, as it is used to trigger the IPC_READ_LATENCY_MS
+  // telemetry probe.
+  void EndRead(PickleIterator& iter, uint32_t ipcMessageType = 0) const;
+
+  // Returns true if the given iterator has at least |len| bytes remaining it,
+  // across all segments. If there is not that much data available, returns
+  // false. Generally used when reading a (len, data) pair from the message,
+  // before allocating |len| bytes of space, to ensure that reading |len| bytes
+  // will succeed.
+  bool HasBytesAvailable(const PickleIterator* iter, uint32_t len) const;
+
+  // Truncate the message at the current point, discarding any data after this
+  // point in the message.
+  void Truncate(PickleIterator* iter);
+
+  // Methods for adding to the payload of the Pickle.  These values are
+  // appended to the end of the Pickle's payload.  When reading values from a
+  // Pickle, it is important to read them in the order in which they were added
+  // to the Pickle.
+  bool WriteBool(bool value);
+  bool WriteInt16(int16_t value);
+  bool WriteUInt16(uint16_t value);
+  bool WriteInt(int value);
+  bool WriteLong(long value);
+  bool WriteULong(unsigned long value);
+  bool WriteInt32(int32_t value);
+  bool WriteUInt32(uint32_t value);
+  bool WriteInt64(int64_t value);
+  bool WriteUInt64(uint64_t value);
+  bool WriteDouble(double value);
+  bool WriteIntPtr(intptr_t value);
+  bool WriteUnsignedChar(unsigned char value);
+  bool WriteString(const std::string& value);
+  bool WriteWString(const std::wstring& value);
+  bool WriteData(const char* data, uint32_t length);
+  bool WriteBytes(const void* data, uint32_t data_len);
+  // Takes ownership of data
+  bool WriteBytesZeroCopy(void* data, uint32_t data_len, uint32_t capacity);
+
+  bool WriteSentinel(uint32_t sentinel)
+#ifdef MOZ_PICKLE_SENTINEL_CHECKING
+      ;
+#else
+  {
+    return true;
+  }
+#endif
+
+  int32_t* GetInt32PtrForTest(uint32_t offset);
+
+  void InputBytes(const char* data, uint32_t length);
+
+  // Payload follows after allocation of Header (header size is customizable).
+  struct Header {
+    uint32_t payload_size;  // Specifies the size of the payload.
+  };
+
+  // Returns the header, cast to a user-specified type T.  The type T must be a
+  // subclass of Header and its size must correspond to the header_size passed
+  // to the Pickle constructor.
+  template <class T>
+  T* headerT() {
+    DCHECK(sizeof(T) == header_size_);
+    return static_cast<T*>(header_);
+  }
+  template <class T>
+  const T* headerT() const {
+    DCHECK(sizeof(T) == header_size_);
+    return static_cast<const T*>(header_);
+  }
+
+  typedef uint32_t memberAlignmentType;
+
+ protected:
+  uint32_t payload_size() const { return header_->payload_size; }
+
+  // Resizes the buffer for use when writing the specified amount of data. Call
+  // EndWrite with the given length to pad out for the next write.
+  void BeginWrite(uint32_t length);
+
+  // Completes the write operation by padding the data with poison bytes. Should
+  // be paired with BeginWrite, but it does not necessarily have to be called
+  // after the data is written.
+  void EndWrite(uint32_t length);
+
+  // Round 'bytes' up to the next multiple of 'alignment'.  'alignment' must be
+  // a power of 2.
+  template <uint32_t alignment>
+  struct ConstantAligner {
+    static uint32_t align(int bytes) {
+      static_assert((alignment & (alignment - 1)) == 0,
+                    "alignment must be a power of two");
+      return (bytes + (alignment - 1)) & ~static_cast<uint32_t>(alignment - 1);
+    }
+  };
+
+  static uint32_t AlignInt(int bytes) {
+    return ConstantAligner<sizeof(memberAlignmentType)>::align(bytes);
+  }
+
+  static uint32_t AlignCapacity(int bytes) {
+    return ConstantAligner<kSegmentAlignment>::align(bytes);
+  }
+
+  // Returns true if the given iterator could point to data with the given
+  // length. If there is no room for the given data before the end of the
+  // payload, returns false.
+  bool IteratorHasRoomFor(const PickleIterator& iter, uint32_t len) const;
+
+  // Moves the iterator by the given number of bytes, making sure it is aligned.
+  // Pointer (iterator) is NOT aligned, but the change in the pointer
+  // is guaranteed to be a multiple of sizeof(memberAlignmentType).
+  void UpdateIter(PickleIterator* iter, uint32_t bytes) const;
+
+  // Figure out how big the message starting at range_start is. Returns 0 if
+  // there's no enough data to determine (i.e., if [range_start, range_end) does
+  // not contain enough of the message header to know the size).
+  static uint32_t MessageSize(uint32_t header_size, const char* range_start,
+                              const char* range_end);
+
+  // Segments capacities are aligned to 8 bytes to ensure that all reads/writes
+  // at 8-byte aligned offsets will be on 8-byte aligned pointers.
+  static const uint32_t kSegmentAlignment = 8;
+
+ private:
+  friend class PickleIterator;
+
+  BufferList buffers_;
+  Header* header_;
+  uint32_t header_size_;
+};
+
+#endif  // BASE_PICKLE_H__
diff --git a/ipc/chromium/src/base/platform_file.h b/ipc/chromium/src/base/platform_file.h
new file mode 100644
index 0000000000..c76d6f29c5
--- /dev/null
+++ b/ipc/chromium/src/base/platform_file.h
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_PLATFORM_FILE_H_
+#define BASE_PLATFORM_FILE_H_
+
+#include "build/build_config.h"
+#if defined(OS_WIN)
+#  include <windows.h>
+#endif
+
+#include <string>
+
+namespace base {
+
+#if defined(OS_WIN)
+typedef HANDLE PlatformFile;
+const PlatformFile kInvalidPlatformFileValue = INVALID_HANDLE_VALUE;
+#elif defined(OS_POSIX)
+typedef int PlatformFile;
+const PlatformFile kInvalidPlatformFileValue = -1;
+#endif
+
+enum PlatformFileFlags {
+  PLATFORM_FILE_OPEN = 1,
+  PLATFORM_FILE_CREATE = 2,
+  PLATFORM_FILE_OPEN_ALWAYS = 4,    // May create a new file.
+  PLATFORM_FILE_CREATE_ALWAYS = 8,  // May overwrite an old file.
+  PLATFORM_FILE_READ = 16,
+  PLATFORM_FILE_WRITE = 32,
+  PLATFORM_FILE_EXCLUSIVE_READ = 64,  // EXCLUSIVE is opposite of Windows SHARE
+  PLATFORM_FILE_EXCLUSIVE_WRITE = 128,
+  PLATFORM_FILE_ASYNC = 256
+};
+
+// Creates or open the given file. If PLATFORM_FILE_OPEN_ALWAYS is used, and
+// |created| is provided, |created| will be set to true if the file was created
+// or to false in case the file was just opened.
+PlatformFile CreatePlatformFile(const std::wstring& name, int flags,
+                                bool* created);
+
+}  // namespace base
+
+#endif  // BASE_PLATFORM_FILE_H_
diff --git a/ipc/chromium/src/base/platform_thread.h b/ipc/chromium/src/base/platform_thread.h
new file mode 100644
index 0000000000..0b7c461aeb
--- /dev/null
+++ b/ipc/chromium/src/base/platform_thread.h
@@ -0,0 +1,88 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// WARNING: You should *NOT* be using this class directly.  PlatformThread is
+// the low-level platform-specific abstraction to the OS's threading interface.
+// You should instead be using a message-loop driven Thread, see thread.h.
+
+#ifndef BASE_PLATFORM_THREAD_H_
+#define BASE_PLATFORM_THREAD_H_
+
+#include "base/basictypes.h"
+
+// PlatformThreadHandle should not be assumed to be a numeric type, since the
+// standard intends to allow pthread_t to be a structure.  This means you
+// should not initialize it to a value, like 0.  If it's a member variable, the
+// constructor can safely "value initialize" using () in the initializer list.
+#if defined(OS_WIN)
+#  include <windows.h>
+typedef DWORD PlatformThreadId;
+typedef void* PlatformThreadHandle;  // HANDLE
+#elif defined(OS_POSIX)
+#  include <pthread.h>
+typedef pthread_t PlatformThreadHandle;
+#  if defined(OS_LINUX) || defined(OS_OPENBSD) || defined(OS_SOLARIS) || \
+      defined(__GLIBC__)
+#    include <unistd.h>
+typedef pid_t PlatformThreadId;
+#  elif defined(OS_BSD)
+#    include <sys/types.h>
+typedef lwpid_t PlatformThreadId;
+#  elif defined(OS_MACOSX) || defined(OS_IOS)
+#    include <mach/mach.h>
+typedef mach_port_t PlatformThreadId;
+#  endif
+#endif
+
+// A namespace for low-level thread functions.
+class PlatformThread {
+ public:
+  // Gets the current thread id, which may be useful for logging purposes.
+  static PlatformThreadId CurrentId();
+
+  // Yield the current thread so another thread can be scheduled.
+  static void YieldCurrentThread();
+
+  // Sleeps for the specified duration (units are milliseconds).
+  static void Sleep(int duration_ms);
+
+  // Sets the thread name visible to a debugger.  This has no effect otherwise.
+  static void SetName(const char* name);
+
+  // Implement this interface to run code on a background thread.  Your
+  // ThreadMain method will be called on the newly created thread.
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+    virtual void ThreadMain() = 0;
+  };
+
+  // Creates a new thread.  The |stack_size| parameter can be 0 to indicate
+  // that the default stack size should be used.  Upon success,
+  // |*thread_handle| will be assigned a handle to the newly created thread,
+  // and |delegate|'s ThreadMain method will be executed on the newly created
+  // thread.
+  // NOTE: When you are done with the thread handle, you must call Join to
+  // release system resources associated with the thread.  You must ensure that
+  // the Delegate object outlives the thread.
+  static bool Create(size_t stack_size, Delegate* delegate,
+                     PlatformThreadHandle* thread_handle);
+
+  // CreateNonJoinable() does the same thing as Create() except the thread
+  // cannot be Join()'d.  Therefore, it also does not output a
+  // PlatformThreadHandle.
+  static bool CreateNonJoinable(size_t stack_size, Delegate* delegate);
+
+  // Joins with a thread created via the Create function.  This function blocks
+  // the caller until the designated thread exits.  This will invalidate
+  // |thread_handle|.
+  static void Join(PlatformThreadHandle thread_handle);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformThread);
+};
+
+#endif  // BASE_PLATFORM_THREAD_H_
diff --git a/ipc/chromium/src/base/platform_thread_mac.mm b/ipc/chromium/src/base/platform_thread_mac.mm
new file mode 100644
index 0000000000..17cedb0cdb
--- /dev/null
+++ b/ipc/chromium/src/base/platform_thread_mac.mm
@@ -0,0 +1,73 @@
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/platform_thread.h"
+
+#import <Foundation/Foundation.h>
+#include <dlfcn.h>
+
+#include "base/logging.h"
+#include "base/scoped_nsautorelease_pool.h"
+
+// A simple class that demonstrates our impressive ability to do nothing.
+@interface NoOp : NSObject
+
+// Does the deed.  Or does it?
++ (void)noOp;
+
+@end
+
+@implementation NoOp
+
++ (void)noOp {
+}
+
+@end
+
+namespace base {
+
+// If Cocoa is to be used on more than one thread, it must know that the
+// application is multithreaded.  Since it's possible to enter Cocoa code
+// from threads created by pthread_thread_create, Cocoa won't necessarily
+// be aware that the application is multithreaded.  Spawning an NSThread is
+// enough to get Cocoa to set up for multithreaded operation, so this is done
+// if necessary before pthread_thread_create spawns any threads.
+//
+// http://developer.apple.com/documentation/Cocoa/Conceptual/Multithreading/CreatingThreads/chapter_4_section_4.html
+void InitThreading() {
+  // this is called early in startup, before the event loop, so provide
+  // an autorelease pool to prevent leaks here
+  ScopedNSAutoreleasePool pool;
+
+  static BOOL multithreaded = [NSThread isMultiThreaded];
+  if (!multithreaded) {
+    [NSThread detachNewThreadSelector:@selector(noOp) toTarget:[NoOp class] withObject:nil];
+    multithreaded = YES;
+
+    DCHECK([NSThread isMultiThreaded]);
+  }
+}
+
+}  // namespace base
+
+// static
+void PlatformThread::SetName(const char* name) {
+  // pthread_setname_np is only available in 10.6 or later, so test
+  // for it at runtime.
+  int (*dynamic_pthread_setname_np)(const char*);
+  *reinterpret_cast<void**>(&dynamic_pthread_setname_np) =
+      dlsym(RTLD_DEFAULT, "pthread_setname_np");
+  if (!dynamic_pthread_setname_np) return;
+
+  // Mac OS X does not expose the length limit of the name, so
+  // hardcode it.
+  const int kMaxNameLength = 63;
+  std::string shortened_name = std::string(name).substr(0, kMaxNameLength);
+  // pthread_setname() fails (harmlessly) in the sandbox, ignore when it does.
+  // See http://crbug.com/47058
+
+  // The name parameter is copied thus it's safe to release it after calling.
+  // Checked against the bionic implementation in bionic/libc/bionic/pthread.c
+  dynamic_pthread_setname_np(shortened_name.c_str());
+}
diff --git a/ipc/chromium/src/base/platform_thread_posix.cc b/ipc/chromium/src/base/platform_thread_posix.cc
new file mode 100644
index 0000000000..7c866b84c0
--- /dev/null
+++ b/ipc/chromium/src/base/platform_thread_posix.cc
@@ -0,0 +1,150 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/platform_thread.h"
+
+#include <errno.h>
+#include <sched.h>
+
+#if defined(OS_MACOSX)
+#  include <mach/mach.h>
+#elif defined(OS_NETBSD)
+#  include <lwp.h>
+#elif defined(OS_LINUX)
+#  include <sys/syscall.h>
+#  include <sys/prctl.h>
+#endif
+
+#if !defined(OS_MACOSX)
+#  include <unistd.h>
+#endif
+
+#if defined(OS_BSD) && !defined(OS_NETBSD) && !defined(__GLIBC__)
+#  include <pthread_np.h>
+#endif
+
+#include "nsThreadUtils.h"
+
+#if defined(OS_MACOSX)
+namespace base {
+void InitThreading();
+}  // namespace base
+#endif
+
+static void* ThreadFunc(void* closure) {
+  PlatformThread::Delegate* delegate =
+      static_cast<PlatformThread::Delegate*>(closure);
+  delegate->ThreadMain();
+  return NULL;
+}
+
+// static
+PlatformThreadId PlatformThread::CurrentId() {
+  // Pthreads doesn't have the concept of a thread ID, so we have to reach down
+  // into the kernel.
+#if defined(OS_MACOSX)
+  mach_port_t port = mach_thread_self();
+  mach_port_deallocate(mach_task_self(), port);
+  return port;
+#elif defined(OS_LINUX)
+  return syscall(__NR_gettid);
+#elif defined(OS_OPENBSD) || defined(OS_SOLARIS) || defined(__GLIBC__)
+  return (intptr_t)(pthread_self());
+#elif defined(OS_NETBSD)
+  return _lwp_self();
+#elif defined(OS_DRAGONFLY)
+  return lwp_gettid();
+#elif defined(OS_FREEBSD)
+  return pthread_getthreadid_np();
+#endif
+}
+
+// static
+void PlatformThread::YieldCurrentThread() { sched_yield(); }
+
+// static
+void PlatformThread::Sleep(int duration_ms) {
+  struct timespec sleep_time, remaining;
+
+  // Contains the portion of duration_ms >= 1 sec.
+  sleep_time.tv_sec = duration_ms / 1000;
+  duration_ms -= sleep_time.tv_sec * 1000;
+
+  // Contains the portion of duration_ms < 1 sec.
+  sleep_time.tv_nsec = duration_ms * 1000 * 1000;  // nanoseconds.
+
+  while (nanosleep(&sleep_time, &remaining) == -1 && errno == EINTR)
+    sleep_time = remaining;
+}
+
+#ifndef OS_MACOSX
+// Mac is implemented in platform_thread_mac.mm.
+
+// static
+void PlatformThread::SetName(const char* name) {
+  // On linux we can get the thread names to show up in the debugger by setting
+  // the process name for the LWP.  We don't want to do this for the main
+  // thread because that would rename the process, causing tools like killall
+  // to stop working.
+  if (PlatformThread::CurrentId() == getpid()) return;
+
+  // Using NS_SetCurrentThreadName, as opposed to using platform APIs directly,
+  // also sets the thread name on the PRThread wrapper, and allows us to
+  // retrieve it using PR_GetThreadName.
+  NS_SetCurrentThreadName(name);
+}
+#endif  // !OS_MACOSX
+
+namespace {
+
+bool CreateThread(size_t stack_size, bool joinable,
+                  PlatformThread::Delegate* delegate,
+                  PlatformThreadHandle* thread_handle) {
+#if defined(OS_MACOSX)
+  base::InitThreading();
+#endif  // OS_MACOSX
+
+  bool success = false;
+  pthread_attr_t attributes;
+  pthread_attr_init(&attributes);
+
+  // Pthreads are joinable by default, so only specify the detached attribute if
+  // the thread should be non-joinable.
+  if (!joinable) {
+    pthread_attr_setdetachstate(&attributes, PTHREAD_CREATE_DETACHED);
+  }
+
+  if (stack_size == 0) stack_size = nsIThreadManager::DEFAULT_STACK_SIZE;
+  pthread_attr_setstacksize(&attributes, stack_size);
+
+  success = !pthread_create(thread_handle, &attributes, ThreadFunc, delegate);
+
+  pthread_attr_destroy(&attributes);
+  return success;
+}
+
+}  // anonymous namespace
+
+// static
+bool PlatformThread::Create(size_t stack_size, Delegate* delegate,
+                            PlatformThreadHandle* thread_handle) {
+  return CreateThread(stack_size, true /* joinable thread */, delegate,
+                      thread_handle);
+}
+
+// static
+bool PlatformThread::CreateNonJoinable(size_t stack_size, Delegate* delegate) {
+  PlatformThreadHandle unused;
+
+  bool result = CreateThread(stack_size, false /* non-joinable thread */,
+                             delegate, &unused);
+  return result;
+}
+
+// static
+void PlatformThread::Join(PlatformThreadHandle thread_handle) {
+  pthread_join(thread_handle, NULL);
+}
diff --git a/ipc/chromium/src/base/platform_thread_win.cc b/ipc/chromium/src/base/platform_thread_win.cc
new file mode 100644
index 0000000000..59eb45aff6
--- /dev/null
+++ b/ipc/chromium/src/base/platform_thread_win.cc
@@ -0,0 +1,80 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/platform_thread.h"
+
+#include "base/logging.h"
+#include "base/win_util.h"
+
+#include "nsThreadUtils.h"
+
+namespace {
+
+DWORD __stdcall ThreadFunc(void* closure) {
+  PlatformThread::Delegate* delegate =
+      static_cast<PlatformThread::Delegate*>(closure);
+  delegate->ThreadMain();
+  return 0;
+}
+
+}  // namespace
+
+// static
+PlatformThreadId PlatformThread::CurrentId() { return GetCurrentThreadId(); }
+
+// static
+void PlatformThread::YieldCurrentThread() { ::Sleep(0); }
+
+// static
+void PlatformThread::Sleep(int duration_ms) { ::Sleep(duration_ms); }
+
+// static
+void PlatformThread::SetName(const char* name) {
+  // Using NS_SetCurrentThreadName, as opposed to using platform APIs directly,
+  // also sets the thread name on the PRThread wrapper, and allows us to
+  // retrieve it using PR_GetThreadName.
+  NS_SetCurrentThreadName(name);
+}
+
+// static
+bool PlatformThread::Create(size_t stack_size, Delegate* delegate,
+                            PlatformThreadHandle* thread_handle) {
+  unsigned int flags = 0;
+  if (stack_size > 0) {
+    flags = STACK_SIZE_PARAM_IS_A_RESERVATION;
+  } else {
+    stack_size = 0;
+  }
+
+  // Using CreateThread here vs _beginthreadex makes thread creation a bit
+  // faster and doesn't require the loader lock to be available.  Our code will
+  // have to work running on CreateThread() threads anyway, since we run code
+  // on the Windows thread pool, etc.  For some background on the difference:
+  //   http://www.microsoft.com/msj/1099/win32/win321099.aspx
+  *thread_handle =
+      CreateThread(NULL, stack_size, ThreadFunc, delegate, flags, NULL);
+  return *thread_handle != NULL;
+}
+
+// static
+bool PlatformThread::CreateNonJoinable(size_t stack_size, Delegate* delegate) {
+  PlatformThreadHandle thread_handle;
+  bool result = Create(stack_size, delegate, &thread_handle);
+  CloseHandle(thread_handle);
+  return result;
+}
+
+// static
+void PlatformThread::Join(PlatformThreadHandle thread_handle) {
+  DCHECK(thread_handle);
+
+  // Wait for the thread to exit.  It should already have terminated but make
+  // sure this assumption is valid.
+  DWORD result = WaitForSingleObject(thread_handle, INFINITE);
+  DCHECK_EQ(WAIT_OBJECT_0, result);
+
+  CloseHandle(thread_handle);
+}
diff --git a/ipc/chromium/src/base/port.h b/ipc/chromium/src/base/port.h
new file mode 100644
index 0000000000..9d78f52cb6
--- /dev/null
+++ b/ipc/chromium/src/base/port.h
@@ -0,0 +1,65 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_PORT_H_
+#define BASE_PORT_H_
+
+#include <stdarg.h>
+#include "build/build_config.h"
+
+#ifdef COMPILER_MSVC
+#  define GG_LONGLONG(x) x##I64
+#  define GG_ULONGLONG(x) x##UI64
+#else
+#  define GG_LONGLONG(x) x##LL
+#  define GG_ULONGLONG(x) x##ULL
+#endif
+
+// Per C99 7.8.14, define __STDC_CONSTANT_MACROS before including <stdint.h>
+// to get the INTn_C and UINTn_C macros for integer constants.  It's difficult
+// to guarantee any specific ordering of header includes, so it's difficult to
+// guarantee that the INTn_C macros can be defined by including <stdint.h> at
+// any specific point.  Provide GG_INTn_C macros instead.
+
+#define GG_INT8_C(x) (x)
+#define GG_INT16_C(x) (x)
+#define GG_INT32_C(x) (x)
+#define GG_INT64_C(x) GG_LONGLONG(x)
+
+#define GG_UINT8_C(x) (x##U)
+#define GG_UINT16_C(x) (x##U)
+#define GG_UINT32_C(x) (x##U)
+#define GG_UINT64_C(x) GG_ULONGLONG(x)
+
+namespace base {
+
+// It's possible for functions that use a va_list, such as StringPrintf, to
+// invalidate the data in it upon use.  The fix is to make a copy of the
+// structure before using it and use that copy instead.  va_copy is provided
+// for this purpose.  MSVC does not provide va_copy, so define an
+// implementation here.  It is not guaranteed that assignment is a copy, so the
+// StringUtil.VariableArgsFunc unit test tests this capability.
+
+// The C standard says that va_copy is a "macro", not a function.  Trying to
+// use va_list as ref args to a function, as above, breaks some machines.
+#if defined(COMPILER_GCC)
+#  define base_va_copy(_a, _b) ::va_copy(_a, _b)
+#elif defined(COMPILER_MSVC)
+#  define base_va_copy(_a, _b) (_a = _b)
+#else
+#  error No va_copy for your compiler
+#endif
+
+}  // namespace base
+
+// Define an OS-neutral wrapper for shared library entry points
+#if defined(OS_WIN)
+#  define API_CALL __stdcall
+#elif defined(OS_LINUX) || defined(OS_MACOSX)
+#  define API_CALL
+#endif
+
+#endif  // BASE_PORT_H_
diff --git a/ipc/chromium/src/base/process.h b/ipc/chromium/src/base/process.h
new file mode 100644
index 0000000000..222aaefff1
--- /dev/null
+++ b/ipc/chromium/src/base/process.h
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_PROCESS_H_
+#define BASE_PROCESS_H_
+
+#include "base/basictypes.h"
+
+#include <sys/types.h>
+#ifdef OS_WIN
+#  include <windows.h>
+#endif
+
+namespace base {
+
+// ProcessHandle is a platform specific type which represents the underlying OS
+// handle to a process.
+// ProcessId is a number which identifies the process in the OS.
+#if defined(OS_WIN)
+typedef HANDLE ProcessHandle;
+typedef DWORD ProcessId;
+// inttypes.h-like macro for ProcessId formatting.
+#  define PRIPID "lu"
+
+const ProcessHandle kInvalidProcessHandle = INVALID_HANDLE_VALUE;
+
+// In theory, on Windows, this is a valid process ID, but in practice they are
+// currently divisible by four. Process IDs share the kernel handle allocation
+// code and they are guaranteed to be divisible by four.
+// As this could change for process IDs we shouldn't generally rely on this
+// property, however even if that were to change, it seems safe to rely on this
+// particular value never being used.
+const ProcessId kInvalidProcessId = kuint32max;
+#elif defined(OS_POSIX)
+// On POSIX, our ProcessHandle will just be the PID.
+typedef pid_t ProcessHandle;
+typedef pid_t ProcessId;
+// inttypes.h-like macro for ProcessId formatting.
+#  define PRIPID "d"
+
+const ProcessHandle kInvalidProcessHandle = -1;
+const ProcessId kInvalidProcessId = -1;
+#endif
+
+}  // namespace base
+
+#endif  // BASE_PROCESS_H_
diff --git a/ipc/chromium/src/base/process_util.h b/ipc/chromium/src/base/process_util.h
new file mode 100644
index 0000000000..af1c595c14
--- /dev/null
+++ b/ipc/chromium/src/base/process_util.h
@@ -0,0 +1,344 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This file/namespace contains utility functions for enumerating, ending and
+// computing statistics of processes.
+
+#ifndef BASE_PROCESS_UTIL_H_
+#define BASE_PROCESS_UTIL_H_
+
+#include "base/basictypes.h"
+
+#if defined(OS_WIN)
+#  include "mozilla/ipc/EnvironmentMap.h"
+#  include <windows.h>
+#  include <tlhelp32.h>
+#elif defined(OS_LINUX) || defined(__GLIBC__)
+#  include <dirent.h>
+#  include <limits.h>
+#  include <sys/types.h>
+#elif defined(OS_MACOSX)
+#  include <mach/mach.h>
+#endif
+
+#include <cstddef>
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/process.h"
+
+#include "mozilla/UniquePtr.h"
+#include "mozilla/Result.h"
+#include "mozilla/ResultVariant.h"
+
+#include "mozilla/ipc/LaunchError.h"
+
+#if defined(MOZ_ENABLE_FORKSERVER)
+#  include "nsStringFwd.h"
+#  include "mozilla/ipc/FileDescriptorShuffle.h"
+
+namespace mozilla {
+namespace ipc {
+class FileDescriptor;
+}
+}  // namespace mozilla
+#endif
+
+#if defined(OS_MACOSX)
+struct kinfo_proc;
+#endif
+
+class CommandLine;
+
+namespace base {
+
+using mozilla::Err;
+using mozilla::Ok;
+using mozilla::Result;
+using mozilla::ipc::LaunchError;
+
+enum ProcessArchitecture {
+  PROCESS_ARCH_INVALID = 0x0,
+  PROCESS_ARCH_I386 = 0x1,
+  PROCESS_ARCH_X86_64 = 0x2,
+  PROCESS_ARCH_PPC = 0x4,
+  PROCESS_ARCH_PPC_64 = 0x8,
+  PROCESS_ARCH_ARM = 0x10,
+  PROCESS_ARCH_ARM_64 = 0x20
+};
+
+// A minimalistic but hopefully cross-platform set of exit codes.
+// Do not change the enumeration values or you will break third-party
+// installers.
+enum {
+  PROCESS_END_NORMAL_TERMINATON = 0,
+  PROCESS_END_KILLED_BY_USER = 1,
+  PROCESS_END_PROCESS_WAS_HUNG = 2
+};
+
+// Returns the id of the current process.
+ProcessId GetCurrentProcId();
+
+// Returns the ProcessHandle of the current process.
+ProcessHandle GetCurrentProcessHandle();
+
+// Converts a PID to a process handle. This handle must be closed by
+// CloseProcessHandle when you are done with it. Returns true on success.
+bool OpenProcessHandle(ProcessId pid, ProcessHandle* handle);
+
+// Converts a PID to a process handle. On Windows the handle is opened
+// with more access rights and must only be used by trusted code.
+// You have to close returned handle using CloseProcessHandle. Returns true
+// on success.
+bool OpenPrivilegedProcessHandle(ProcessId pid, ProcessHandle* handle);
+
+// Closes the process handle opened by OpenProcessHandle.
+void CloseProcessHandle(ProcessHandle process);
+
+// Returns the unique ID for the specified process. This is functionally the
+// same as Windows' GetProcessId(), but works on versions of Windows before
+// Win XP SP1 as well.
+ProcessId GetProcId(ProcessHandle process);
+
+#if defined(OS_POSIX)
+// Close all file descriptors, except for std{in,out,err} and those
+// for which the given function returns true.  Only call this function
+// in a child process where you know that there aren't any other
+// threads.
+void CloseSuperfluousFds(void* aCtx, bool (*aShouldPreserve)(void*, int));
+
+typedef std::vector<std::pair<int, int> > file_handle_mapping_vector;
+typedef std::map<std::string, std::string> environment_map;
+
+// Deleter for the array of strings allocated within BuildEnvironmentArray.
+struct FreeEnvVarsArray {
+  void operator()(char** array);
+};
+
+typedef mozilla::UniquePtr<char*[], FreeEnvVarsArray> EnvironmentArray;
+#endif
+
+struct LaunchOptions {
+  // If true, wait for the process to terminate.  Otherwise, return
+  // immediately.
+  bool wait = false;
+
+#if defined(OS_WIN)
+  bool start_hidden = false;
+
+  // Start as an independent process rather than a process that is closed by the
+  // parent job. This will pass the flag CREATE_BREAKAWAY_FROM_JOB.
+  bool start_independent = false;
+
+  // Environment variables to be applied in addition to the current
+  // process's environment, replacing them where necessary.
+  EnvironmentMap env_map;
+
+  std::vector<HANDLE> handles_to_inherit;
+#endif
+#if defined(OS_POSIX)
+  environment_map env_map;
+
+  // If non-null, specifies the entire environment to use for the
+  // child process, instead of inheriting from the parent; env_map is
+  // ignored in that case.  Note that the strings are allocated using
+  // malloc (e.g., with strdup), but the array of pointers is
+  // allocated with new[] and is terminated with a null pointer.
+  EnvironmentArray full_env;
+
+  // If non-empty, set the child process's current working directory.
+  std::string workdir;
+
+  // A mapping of (src fd -> dest fd) to propagate into the child
+  // process.  All other fds will be closed, except std{in,out,err}.
+  file_handle_mapping_vector fds_to_remap;
+#endif
+
+#if defined(MOZ_ENABLE_FORKSERVER)
+  bool use_forkserver = false;
+#endif
+
+#if defined(OS_LINUX)
+  struct ForkDelegate {
+    virtual ~ForkDelegate() {}
+    virtual pid_t Fork() = 0;
+  };
+
+  // If non-null, the fork delegate will be called instead of fork().
+  // It is not required to call pthread_atfork hooks.
+  mozilla::UniquePtr<ForkDelegate> fork_delegate = nullptr;
+#endif
+
+#ifdef OS_MACOSX
+  // On macOS 10.14+, disclaims responsibility for the child process
+  // with respect to privacy/security permission prompts and
+  // decisions.  Ignored if not supported by the OS.
+  bool disclaim = false;
+#  ifdef __aarch64__
+  // The architecture to launch when launching a "universal" binary.
+  // Note: the implementation only supports launching x64 child
+  // processes from arm64 parent processes.
+  uint32_t arch = PROCESS_ARCH_INVALID;
+#  endif  // __aarch64__
+#endif    // OS_MACOSX
+};
+
+#if defined(OS_WIN)
+// Runs the given application name with the given command line. Normally, the
+// first command line argument should be the path to the process, and don't
+// forget to quote it.
+//
+// Example (including literal quotes)
+//  cmdline = "c:\windows\explorer.exe" -foo "c:\bar\"
+//
+// If process_handle is non-NULL, the process handle of the launched app will be
+// stored there on a successful launch.
+// NOTE: In this case, the caller is responsible for closing the handle so
+//       that it doesn't leak!
+Result<Ok, LaunchError> LaunchApp(const std::wstring& cmdline,
+                                  const LaunchOptions& options,
+                                  ProcessHandle* process_handle);
+
+#elif defined(OS_POSIX)
+// Runs the application specified in argv[0] with the command line argv.
+//
+// The pid will be stored in process_handle if that pointer is
+// non-null.
+//
+// Note that the first argument in argv must point to the filename,
+// and must be fully specified (i.e., this will not search $PATH).
+Result<Ok, LaunchError> LaunchApp(const std::vector<std::string>& argv,
+                                  const LaunchOptions& options,
+                                  ProcessHandle* process_handle);
+
+// Merge an environment map with the current environment.
+// Existing variables are overwritten by env_vars_to_set.
+EnvironmentArray BuildEnvironmentArray(const environment_map& env_vars_to_set);
+#endif
+
+#if defined(MOZ_ENABLE_FORKSERVER)
+/**
+ * Create and initialize a new process as a content process.
+ *
+ * This class is used only by the fork server.
+ * To create a new content process, two steps are
+ *  - calling |ForkProcess()| to create a new process, and
+ *  - calling |InitAppProcess()| in the new process, the child
+ *    process, to initialize it for running WEB content later.
+ *
+ * The fork server can clean up it's resources in-between the first
+ * and second step, that is why two steps.
+ */
+class AppProcessBuilder {
+ public:
+  AppProcessBuilder();
+  // This function will fork a new process for use as a
+  // content processes.
+  bool ForkProcess(const std::vector<std::string>& argv,
+                   const LaunchOptions& options, ProcessHandle* process_handle);
+  // This function will be called in the child process to initializes
+  // the environment of the content process.  It should be called
+  // after the message loop of the main thread, to make sure the fork
+  // server is destroyed properly in the child process.
+  //
+  // The message loop may allocate resources like file descriptors.
+  // If this function is called before the end of the loop, the
+  // reosurces may be destroyed while the loop is still alive.
+  void InitAppProcess(int* argcp, char*** argvp);
+
+ private:
+  void ReplaceArguments(int* argcp, char*** argvp);
+
+  mozilla::ipc::FileDescriptorShuffle shuffle_;
+  std::vector<std::string> argv_;
+};
+
+void InitForkServerProcess();
+
+/**
+ * Make a FD not being closed when create a new content process.
+ *
+ * AppProcessBuilder would close most unrelated FDs for new content
+ * processes.  You may want to reserve some of FDs to keep using them
+ * in content processes.
+ */
+void RegisterForkServerNoCloseFD(int aFd);
+#endif
+
+// Executes the application specified by cl. This function delegates to one
+// of the above two platform-specific functions.
+Result<Ok, LaunchError> LaunchApp(const CommandLine& cl, const LaunchOptions&,
+                                  ProcessHandle* process_handle);
+
+// Attempts to kill the process identified by the given process
+// entry structure, giving it the specified exit code.
+// Returns true if this is successful, false otherwise.
+bool KillProcess(ProcessHandle process, int exit_code);
+
+#ifdef OS_POSIX
+// Returns whether the given process has exited.  If it returns true,
+// the process status has been consumed and `IsProcessDead` should not
+// be called again on the same process (like `waitpid`).
+//
+// In various error cases (e.g., the process doesn't exist or isn't a
+// child of this process) it will also return true to indicate that
+// the caller should give up and not try again.
+//
+// If the `blocking` parameter is set to true, this function will try
+// to block the calling thread indefinitely until the process exits.
+// This may not be possible (if the child is also being debugged by
+// the parent process, e.g. due to the crash reporter), in which case
+// it will return false and the caller will need to wait and retry.
+bool IsProcessDead(ProcessHandle handle, bool blocking = false);
+#endif
+
+}  // namespace base
+
+namespace mozilla {
+
+class EnvironmentLog {
+ public:
+  template <size_t N>
+  explicit EnvironmentLog(const char (&varname)[N])
+      : EnvironmentLog(varname, N) {}
+
+  ~EnvironmentLog() {}
+
+  void print(const char* format, ...);
+
+ private:
+  explicit EnvironmentLog(const char* varname, size_t len);
+
+#if defined(OS_WIN)
+  std::wstring fname_;
+#else
+  std::string fname_;
+#endif
+
+  DISALLOW_EVIL_CONSTRUCTORS(EnvironmentLog);
+};
+
+#if defined(MOZ_ENABLE_FORKSERVER)
+typedef std::tuple<nsCString, nsCString> EnvVar;
+typedef std::tuple<mozilla::ipc::FileDescriptor, int> FdMapping;
+#endif
+
+}  // namespace mozilla
+
+#if defined(OS_WIN)
+// Undo the windows.h damage
+#  undef GetMessage
+#  undef CreateEvent
+#  undef GetClassName
+#  undef GetBinaryType
+#  undef RemoveDirectory
+#  undef LoadImage
+#  undef LoadIcon
+#endif
+
+#endif  // BASE_PROCESS_UTIL_H_
diff --git a/ipc/chromium/src/base/process_util_linux.cc b/ipc/chromium/src/base/process_util_linux.cc
new file mode 100644
index 0000000000..8506d74848
--- /dev/null
+++ b/ipc/chromium/src/base/process_util_linux.cc
@@ -0,0 +1,356 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/process_util.h"
+
+#include <string>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#if defined(MOZ_CODE_COVERAGE)
+#  include "nsString.h"
+#endif
+
+#include "mozilla/ipc/LaunchError.h"
+
+#if defined(MOZ_ENABLE_FORKSERVER)
+#  include <stdlib.h>
+#  include <fcntl.h>
+#  if defined(DEBUG)
+#    include "base/message_loop.h"
+#  endif
+#  include "mozilla/ipc/ForkServiceChild.h"
+
+#  include "mozilla/Unused.h"
+#  include "mozilla/ScopeExit.h"
+#  include "mozilla/ipc/ProcessUtils.h"
+
+using namespace mozilla::ipc;
+#endif
+
+#if defined(MOZ_CODE_COVERAGE)
+#  include "prenv.h"
+#  include "mozilla/ipc/EnvironmentMap.h"
+#endif
+
+#include "base/command_line.h"
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+#include "mozilla/ipc/FileDescriptor.h"
+#include "mozilla/ipc/FileDescriptorShuffle.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/Result.h"
+
+// WARNING: despite the name, this file is also used on the BSDs and
+// Solaris (basically, Unixes that aren't Mac OS), not just Linux.
+
+namespace {
+
+static mozilla::EnvironmentLog gProcessLog("MOZ_PROCESS_LOG");
+
+}  // namespace
+
+namespace base {
+
+#if defined(MOZ_ENABLE_FORKSERVER)
+static mozilla::StaticAutoPtr<std::vector<int> > sNoCloseFDs;
+
+void RegisterForkServerNoCloseFD(int fd) {
+  if (!sNoCloseFDs) {
+    sNoCloseFDs = new std::vector<int>();
+  }
+  sNoCloseFDs->push_back(fd);
+}
+
+static bool IsNoCloseFd(int fd) {
+  if (!sNoCloseFDs) {
+    return false;
+  }
+  return std::any_of(sNoCloseFDs->begin(), sNoCloseFDs->end(),
+                     [fd](int regfd) -> bool { return regfd == fd; });
+}
+
+AppProcessBuilder::AppProcessBuilder() {}
+
+static void ReplaceEnviroment(const LaunchOptions& options) {
+  for (auto& elt : options.env_map) {
+    setenv(elt.first.c_str(), elt.second.c_str(), 1);
+  }
+}
+
+bool AppProcessBuilder::ForkProcess(const std::vector<std::string>& argv,
+                                    const LaunchOptions& options,
+                                    ProcessHandle* process_handle) {
+  auto cleanFDs = mozilla::MakeScopeExit([&] {
+    for (auto& elt : options.fds_to_remap) {
+      auto fd = std::get<0>(elt);
+      close(fd);
+    }
+  });
+
+  argv_ = argv;
+  if (!shuffle_.Init(options.fds_to_remap)) {
+    return false;
+  }
+
+  // Avoid the content of the buffer being sent out by child processes
+  // repeatly.
+  fflush(stdout);
+  fflush(stderr);
+
+#  ifdef OS_LINUX
+  pid_t pid = options.fork_delegate ? options.fork_delegate->Fork() : fork();
+  // WARNING: if pid == 0, only async signal safe operations are permitted from
+  // here until exec or _exit.
+  //
+  // Specifically, heap allocation is not safe: the sandbox's fork substitute
+  // won't run the pthread_atfork handlers that fix up the malloc locks.
+#  else
+  pid_t pid = fork();
+#  endif
+
+  if (pid < 0) {
+    return false;
+  }
+
+  if (pid == 0) {
+    cleanFDs.release();
+    ReplaceEnviroment(options);
+  } else {
+    gProcessLog.print("==> process %d launched child process %d\n",
+                      GetCurrentProcId(), pid);
+    if (options.wait) HANDLE_EINTR(waitpid(pid, 0, 0));
+  }
+
+  if (process_handle) *process_handle = pid;
+
+  return true;
+}
+
+void AppProcessBuilder::ReplaceArguments(int* argcp, char*** argvp) {
+  // Change argc & argv of main() with the arguments passing
+  // through IPC.
+  char** argv = new char*[argv_.size() + 1];
+  char** p = argv;
+  for (auto& elt : argv_) {
+    *p++ = strdup(elt.c_str());
+  }
+  *p = nullptr;
+  *argvp = argv;
+  *argcp = argv_.size();
+}
+
+void AppProcessBuilder::InitAppProcess(int* argcp, char*** argvp) {
+  MOZ_ASSERT(MessageLoop::current() == nullptr,
+             "The message loop of the main thread should have been destroyed");
+
+  // The fork server handle SIGCHLD to read status of content
+  // processes to handle Zombies.  But, it is not necessary for
+  // content processes.
+  signal(SIGCHLD, SIG_DFL);
+
+  for (const auto& fds : shuffle_.Dup2Sequence()) {
+    int fd = HANDLE_EINTR(dup2(fds.first, fds.second));
+    MOZ_RELEASE_ASSERT(fd == fds.second, "dup2 failed");
+  }
+
+  CloseSuperfluousFds(&shuffle_, [](void* ctx, int fd) {
+    return static_cast<decltype(&shuffle_)>(ctx)->MapsTo(fd) || IsNoCloseFd(fd);
+  });
+  // Without this, the destructor of |shuffle_| would try to close FDs
+  // created by it, but they have been closed by
+  // |CloseSuperfluousFds()|.
+  shuffle_.Forget();
+
+  ReplaceArguments(argcp, argvp);
+}
+
+static void handle_sigchld(int s) {
+  while (true) {
+    if (waitpid(-1, nullptr, WNOHANG) <= 0) {
+      // On error, or no process changed state.
+      break;
+    }
+  }
+}
+
+static void InstallChildSignalHandler() {
+  // Since content processes are not children of the chrome process
+  // any more, the fork server process has to handle SIGCHLD, or
+  // content process would remain zombie after dead.
+  signal(SIGCHLD, handle_sigchld);
+}
+
+static void ReserveFileDescriptors() {
+  // Reserve the lower positions of the file descriptors to make sure
+  // debug files and other files don't take these positions.  So we
+  // can keep their file descriptors during CloseSuperfluousFds() with
+  // out any confliction with mapping passing from the parent process.
+  int fd = open("/dev/null", O_RDONLY);
+  for (int i = 1; i < 10; i++) {
+    mozilla::Unused << dup(fd);
+  }
+}
+
+void InitForkServerProcess() {
+  InstallChildSignalHandler();
+  ReserveFileDescriptors();
+  SetThisProcessName("forkserver");
+}
+
+static Result<Ok, LaunchError> LaunchAppWithForkServer(
+    const std::vector<std::string>& argv, const LaunchOptions& options,
+    ProcessHandle* process_handle) {
+  MOZ_ASSERT(ForkServiceChild::Get());
+
+  nsTArray<nsCString> _argv(argv.size());
+  nsTArray<mozilla::EnvVar> env(options.env_map.size());
+  nsTArray<mozilla::FdMapping> fdsremap(options.fds_to_remap.size());
+
+  for (auto& arg : argv) {
+    _argv.AppendElement(arg.c_str());
+  }
+  for (auto& vv : options.env_map) {
+    env.AppendElement(mozilla::EnvVar(nsCString(vv.first.c_str()),
+                                      nsCString(vv.second.c_str())));
+  }
+  for (auto& fdmapping : options.fds_to_remap) {
+    fdsremap.AppendElement(mozilla::FdMapping(
+        mozilla::ipc::FileDescriptor(fdmapping.first), fdmapping.second));
+  }
+
+  return ForkServiceChild::Get()->SendForkNewSubprocess(_argv, env, fdsremap,
+                                                        process_handle);
+}
+#endif  // MOZ_ENABLE_FORKSERVER
+
+Result<Ok, LaunchError> LaunchApp(const std::vector<std::string>& argv,
+                                  const LaunchOptions& options,
+                                  ProcessHandle* process_handle) {
+#if defined(MOZ_ENABLE_FORKSERVER)
+  if (options.use_forkserver && ForkServiceChild::Get()) {
+    return LaunchAppWithForkServer(argv, options, process_handle);
+  }
+#endif
+
+  mozilla::UniquePtr<char*[]> argv_cstr(new char*[argv.size() + 1]);
+
+  EnvironmentArray env_storage;
+  const EnvironmentArray& envp =
+      options.full_env ? options.full_env
+                       : (env_storage = BuildEnvironmentArray(options.env_map));
+
+  // Init() there will call fcntl(F_DUPFD/F_DUPFD_CLOEXEC) under the hood in
+  // https://searchfox.org/mozilla-central/rev/55d5c4b9dffe5e59eb6b019c1a930ec9ada47e10/ipc/glue/FileDescriptorShuffle.cpp#72
+  // so it will set errno.
+  mozilla::ipc::FileDescriptorShuffle shuffle;
+  if (!shuffle.Init(options.fds_to_remap)) {
+    CHROMIUM_LOG(WARNING) << "FileDescriptorShuffle::Init failed";
+    return Err(LaunchError("FileDescriptorShuffle", errno));
+  }
+
+#ifdef MOZ_CODE_COVERAGE
+  // Before gcc/clang 10 there is a gcda dump before the fork.
+  // This dump mustn't be interrupted by a SIGUSR1 else we may
+  // have a dead lock (see bug 1637377).
+  // So we just remove the handler and restore it after the fork
+  // It's up the child process to set it up.
+  // Once we switch to gcc/clang 10, we could just remove it in the child
+  // process
+  void (*ccovSigHandler)(int) = signal(SIGUSR1, SIG_IGN);
+  const char* gcov_child_prefix = PR_GetEnv("GCOV_CHILD_PREFIX");
+#endif
+
+#ifdef OS_LINUX
+  pid_t pid = options.fork_delegate ? options.fork_delegate->Fork() : fork();
+  // WARNING: if pid == 0, only async signal safe operations are permitted from
+  // here until exec or _exit.
+  //
+  // Specifically, heap allocation is not safe: the sandbox's fork substitute
+  // won't run the pthread_atfork handlers that fix up the malloc locks.
+#else
+  pid_t pid = fork();
+#endif
+
+  if (pid < 0) {
+    CHROMIUM_LOG(WARNING) << "fork() failed: " << strerror(errno);
+    return Err(LaunchError("fork", errno));
+  }
+
+  if (pid == 0) {
+    // In the child:
+    if (!options.workdir.empty()) {
+      if (chdir(options.workdir.c_str()) != 0) {
+        // See under execve about logging unsafety.
+        DLOG(ERROR) << "chdir failed " << options.workdir;
+        _exit(127);
+      }
+    }
+
+    for (const auto& fds : shuffle.Dup2Sequence()) {
+      if (HANDLE_EINTR(dup2(fds.first, fds.second)) != fds.second) {
+        // This shouldn't happen, but check for it.  And see below
+        // about logging being unsafe here, so this is debug only.
+        DLOG(ERROR) << "dup2 failed";
+        _exit(127);
+      }
+    }
+
+    CloseSuperfluousFds(&shuffle, [](void* aCtx, int aFd) {
+      return static_cast<decltype(&shuffle)>(aCtx)->MapsTo(aFd);
+    });
+
+    for (size_t i = 0; i < argv.size(); i++)
+      argv_cstr[i] = const_cast<char*>(argv[i].c_str());
+    argv_cstr[argv.size()] = NULL;
+
+#ifdef MOZ_CODE_COVERAGE
+    if (gcov_child_prefix && !options.full_env) {
+      const pid_t child_pid = getpid();
+      nsAutoCString new_gcov_prefix(gcov_child_prefix);
+      new_gcov_prefix.Append(std::to_string((size_t)child_pid));
+      EnvironmentMap new_map = options.env_map;
+      new_map[ENVIRONMENT_LITERAL("GCOV_PREFIX")] =
+          ENVIRONMENT_STRING(new_gcov_prefix.get());
+      // FIXME(bug 1783305): this won't work if full_env is set, and
+      // in general this block of code is doing things it shouldn't
+      // be (async signal unsafety).
+      env_storage = BuildEnvironmentArray(new_map);
+    }
+#endif
+
+    execve(argv_cstr[0], argv_cstr.get(), envp.get());
+    // if we get here, we're in serious trouble and should complain loudly
+    // NOTE: This is async signal unsafe; it could deadlock instead.  (But
+    // only on debug builds; otherwise it's a signal-safe no-op.)
+    DLOG(ERROR) << "FAILED TO exec() CHILD PROCESS, path: " << argv_cstr[0];
+    _exit(127);
+  }
+
+  // In the parent:
+
+#ifdef MOZ_CODE_COVERAGE
+  // Restore the handler for SIGUSR1
+  signal(SIGUSR1, ccovSigHandler);
+#endif
+
+  gProcessLog.print("==> process %d launched child process %d\n",
+                    GetCurrentProcId(), pid);
+  if (options.wait) HANDLE_EINTR(waitpid(pid, 0, 0));
+
+  if (process_handle) *process_handle = pid;
+
+  return Ok();
+}
+
+Result<Ok, LaunchError> LaunchApp(const CommandLine& cl,
+                                  const LaunchOptions& options,
+                                  ProcessHandle* process_handle) {
+  return LaunchApp(cl.argv(), options, process_handle);
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/process_util_mac.mm b/ipc/chromium/src/base/process_util_mac.mm
new file mode 100644
index 0000000000..9cadde52e1
--- /dev/null
+++ b/ipc/chromium/src/base/process_util_mac.mm
@@ -0,0 +1,197 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/process_util.h"
+
+#include <fcntl.h>
+#include <os/availability.h>
+#include <spawn.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include <string>
+
+#include "base/command_line.h"
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+#include "mozilla/ipc/FileDescriptorShuffle.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/Result.h"
+
+#include "mozilla/ipc/LaunchError.h"
+
+extern "C" {
+// N.B. the syscalls are available back to 10.5, but the C wrappers
+// only in 10.12.  Fortunately, 10.12 is our current baseline.
+int pthread_chdir_np(const char* dir) API_AVAILABLE(macosx(10.12));
+int pthread_fchdir_np(int fd) API_AVAILABLE(macosx(10.12));
+
+int responsibility_spawnattrs_setdisclaim(posix_spawnattr_t attrs, int disclaim)
+    API_AVAILABLE(macosx(10.14));
+}
+
+namespace {
+
+static mozilla::EnvironmentLog gProcessLog("MOZ_PROCESS_LOG");
+
+}  // namespace
+
+namespace base {
+
+Result<Ok, LaunchError> LaunchApp(const std::vector<std::string>& argv,
+                                  const LaunchOptions& options, ProcessHandle* process_handle) {
+  Result<Ok, LaunchError> retval = Ok();
+
+  char* argv_copy[argv.size() + 1];
+  for (size_t i = 0; i < argv.size(); i++) {
+    argv_copy[i] = const_cast<char*>(argv[i].c_str());
+  }
+  argv_copy[argv.size()] = NULL;
+
+  EnvironmentArray env_storage;
+  const EnvironmentArray& vars =
+      options.full_env ? options.full_env : (env_storage = BuildEnvironmentArray(options.env_map));
+
+  posix_spawn_file_actions_t file_actions;
+  int err = posix_spawn_file_actions_init(&file_actions);
+  if (err != 0) {
+    DLOG(WARNING) << "posix_spawn_file_actions_init failed";
+    return Err(LaunchError("posix_spawn_file_actions_init", err));
+  }
+  auto file_actions_guard =
+      mozilla::MakeScopeExit([&file_actions] { posix_spawn_file_actions_destroy(&file_actions); });
+
+  // Turn fds_to_remap array into a set of dup2 calls.
+  //
+  // Init() there will call fcntl(F_DUPFD/F_DUPFD_CLOEXEC) under the hood in
+  // https://searchfox.org/mozilla-central/rev/55d5c4b9dffe5e59eb6b019c1a930ec9ada47e10/ipc/glue/FileDescriptorShuffle.cpp#72
+  // so it will set errno.
+  mozilla::ipc::FileDescriptorShuffle shuffle;
+  if (!shuffle.Init(options.fds_to_remap)) {
+    DLOG(WARNING) << "FileDescriptorShuffle::Init failed";
+    return Err(LaunchError("FileDescriptorShuffle", errno));
+  }
+  for (const auto& fd_map : shuffle.Dup2Sequence()) {
+    int src_fd = fd_map.first;
+    int dest_fd = fd_map.second;
+
+    int rv = posix_spawn_file_actions_adddup2(&file_actions, src_fd, dest_fd);
+    if (rv != 0) {
+      DLOG(WARNING) << "posix_spawn_file_actions_adddup2 failed";
+      return Err(LaunchError("posix_spawn_file_actions_adddup2", rv));
+    }
+  }
+
+  // macOS 10.15 allows adding a chdir operation to the file actions;
+  // this ought to be part of the standard but sadly is not.  On older
+  // versions, we can use a different nonstandard extension:
+  // pthread_{f,}chdir_np, so we can temporarily change the calling
+  // thread's cwd (which is then inherited by the child) without
+  // disturbing other threads, and then restore it afterwards.
+  int old_cwd_fd = -1;
+  if (!options.workdir.empty()) {
+    if (@available(macOS 10.15, *)) {
+      int rv = posix_spawn_file_actions_addchdir_np(&file_actions, options.workdir.c_str());
+      if (rv != 0) {
+        DLOG(WARNING) << "posix_spawn_file_actions_addchdir_np failed";
+        return Err(LaunchError("posix_spawn_file_actions_addchdir", rv));
+      }
+    } else {
+      old_cwd_fd = open(".", O_RDONLY | O_CLOEXEC | O_DIRECTORY);
+      if (old_cwd_fd < 0) {
+        DLOG(WARNING) << "open(\".\") failed";
+        return Err(LaunchError("open", errno));
+      }
+      if (pthread_chdir_np(options.workdir.c_str()) != 0) {
+        DLOG(WARNING) << "pthread_chdir_np failed";
+        return Err(LaunchError("pthread_chdir_np", errno));
+      }
+    }
+  }
+  auto thread_cwd_guard = mozilla::MakeScopeExit([old_cwd_fd] {
+    if (old_cwd_fd >= 0) {
+      if (pthread_fchdir_np(old_cwd_fd) != 0) {
+        DLOG(ERROR) << "pthread_fchdir_np failed; thread is in the wrong directory!";
+      }
+      close(old_cwd_fd);
+    }
+  });
+
+  // Initialize spawn attributes.
+  posix_spawnattr_t spawnattr;
+  err = posix_spawnattr_init(&spawnattr);
+  if (err != 0) {
+    DLOG(WARNING) << "posix_spawnattr_init failed";
+    return Err(LaunchError("posix_spawnattr_init", err));
+  }
+  auto spawnattr_guard =
+      mozilla::MakeScopeExit([&spawnattr] { posix_spawnattr_destroy(&spawnattr); });
+
+#if defined(XP_MACOSX) && defined(__aarch64__)
+  if (options.arch == PROCESS_ARCH_X86_64) {
+    cpu_type_t cpu_pref = CPU_TYPE_X86_64;
+    size_t count = 1;
+    size_t ocount = 0;
+    int rv = posix_spawnattr_setbinpref_np(&spawnattr, count, &cpu_pref, &ocount);
+    if ((rv != 0) || (ocount != count)) {
+      DLOG(WARNING) << "posix_spawnattr_setbinpref_np failed";
+      return Err(LaunchError("posix_spawnattr_setbinpref_np", rv));
+    }
+  }
+#endif
+
+  if (options.disclaim) {
+    if (@available(macOS 10.14, *)) {
+      int err = responsibility_spawnattrs_setdisclaim(&spawnattr, 1);
+      if (err != 0) {
+        DLOG(WARNING) << "responsibility_spawnattrs_setdisclaim failed";
+        return Err(LaunchError("responsibility_spawnattrs_setdisclaim", err));
+      }
+    }
+  }
+
+  // Prevent the child process from inheriting any file descriptors
+  // that aren't named in `file_actions`.  (This is an Apple-specific
+  // extension to posix_spawn.)
+  err = posix_spawnattr_setflags(&spawnattr, POSIX_SPAWN_CLOEXEC_DEFAULT);
+  if (err != 0) {
+    DLOG(WARNING) << "posix_spawnattr_setflags failed";
+    return Err(LaunchError("posix_spawnattr_setflags", err));
+  }
+
+  // Exempt std{in,out,err} from being closed by POSIX_SPAWN_CLOEXEC_DEFAULT.
+  for (int fd = 0; fd <= STDERR_FILENO; ++fd) {
+    err = posix_spawn_file_actions_addinherit_np(&file_actions, fd);
+    if (err != 0) {
+      DLOG(WARNING) << "posix_spawn_file_actions_addinherit_np failed";
+      return Err(LaunchError("posix_spawn_file_actions_addinherit_np", err));
+    }
+  }
+
+  int pid = 0;
+  int spawn_succeeded =
+      (posix_spawnp(&pid, argv_copy[0], &file_actions, &spawnattr, argv_copy, vars.get()) == 0);
+
+  bool process_handle_valid = pid > 0;
+  if (!spawn_succeeded || !process_handle_valid) {
+    DLOG(WARNING) << "posix_spawnp failed";
+    retval = Err(LaunchError("posix_spawnp", spawn_succeeded));
+  } else {
+    gProcessLog.print("==> process %d launched child process %d\n", GetCurrentProcId(), pid);
+    if (options.wait) HANDLE_EINTR(waitpid(pid, 0, 0));
+
+    if (process_handle) *process_handle = pid;
+  }
+
+  return retval;
+}
+
+Result<Ok, LaunchError> LaunchApp(const CommandLine& cl, const LaunchOptions& options,
+                                  ProcessHandle* process_handle) {
+  return LaunchApp(cl.argv(), options, process_handle);
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/process_util_posix.cc b/ipc/chromium/src/base/process_util_posix.cc
new file mode 100644
index 0000000000..126fe96e70
--- /dev/null
+++ b/ipc/chromium/src/base/process_util_posix.cc
@@ -0,0 +1,387 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include <limits>
+#include <set>
+
+#include "base/basictypes.h"
+#include "base/command_line.h"
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+#include "base/platform_thread.h"
+#include "base/process_util.h"
+#include "base/time.h"
+#include "base/waitable_event.h"
+#include "base/dir_reader_posix.h"
+
+#include "mozilla/UniquePtr.h"
+#include "mozilla/Unused.h"
+// For PR_DuplicateEnvironment:
+#include "prenv.h"
+#include "prmem.h"
+
+#ifdef MOZ_ENABLE_FORKSERVER
+#  include "mozilla/ipc/ForkServiceChild.h"
+#endif
+
+// We could configure-test for `waitid`, but it's been in POSIX for a
+// long time and OpenBSD seems to be the only Unix we target that
+// doesn't have it.  Note that `waitid` is used to resolve a conflict
+// with the crash reporter, which isn't available on OpenBSD.
+#ifndef __OpenBSD__
+#  define HAVE_WAITID
+#endif
+
+namespace base {
+
+ProcessId GetCurrentProcId() { return getpid(); }
+
+ProcessHandle GetCurrentProcessHandle() { return GetCurrentProcId(); }
+
+bool OpenProcessHandle(ProcessId pid, ProcessHandle* handle) {
+  // On Posix platforms, process handles are the same as PIDs, so we
+  // don't need to do anything.
+  *handle = pid;
+  return true;
+}
+
+bool OpenPrivilegedProcessHandle(ProcessId pid, ProcessHandle* handle) {
+  // On POSIX permissions are checked for each operation on process,
+  // not when opening a "handle".
+  return OpenProcessHandle(pid, handle);
+}
+
+void CloseProcessHandle(ProcessHandle process) {
+  // See OpenProcessHandle, nothing to do.
+  return;
+}
+
+ProcessId GetProcId(ProcessHandle process) { return process; }
+
+// Attempts to kill the process identified by the given process
+// entry structure.  Ignores specified exit_code; posix can't force that.
+// Returns true if this is successful, false otherwise.
+bool KillProcess(ProcessHandle process_id, int exit_code) {
+  // It's too easy to accidentally kill pid 0 (meaning the caller's
+  // process group) or pid -1 (all other processes killable by this
+  // user), and neither they nor other negative numbers (process
+  // groups) are legitimately used by this function's callers, so
+  // reject them all.
+  if (process_id <= 0) {
+    CHROMIUM_LOG(WARNING) << "base::KillProcess refusing to kill pid "
+                          << process_id;
+    return false;
+  }
+
+  bool result = kill(process_id, SIGTERM) == 0;
+
+  if (!result && (errno == ESRCH)) {
+    result = true;
+  }
+
+  if (!result) DLOG(ERROR) << "Unable to terminate process.";
+
+  return result;
+}
+
+#ifdef ANDROID
+typedef unsigned long int rlim_t;
+#endif
+
+// A class to handle auto-closing of DIR*'s.
+class ScopedDIRClose {
+ public:
+  inline void operator()(DIR* x) const {
+    if (x) {
+      closedir(x);
+    }
+  }
+};
+typedef mozilla::UniquePtr<DIR, ScopedDIRClose> ScopedDIR;
+
+void CloseSuperfluousFds(void* aCtx, bool (*aShouldPreserve)(void*, int)) {
+  // DANGER: no calls to malloc (or locks, etc.) are allowed from now on:
+  // https://crbug.com/36678
+  // Also, beware of STL iterators: https://crbug.com/331459
+#if defined(ANDROID)
+  static const rlim_t kSystemDefaultMaxFds = 1024;
+  static const char kFDDir[] = "/proc/self/fd";
+#elif defined(OS_LINUX) || defined(OS_SOLARIS)
+  static const rlim_t kSystemDefaultMaxFds = 8192;
+  static const char kFDDir[] = "/proc/self/fd";
+#elif defined(OS_MACOSX)
+  static const rlim_t kSystemDefaultMaxFds = 256;
+  static const char kFDDir[] = "/dev/fd";
+#elif defined(OS_BSD)
+  // the getrlimit below should never fail, so whatever ..
+  static const rlim_t kSystemDefaultMaxFds = 1024;
+  // at least /dev/fd will exist
+  static const char kFDDir[] = "/dev/fd";
+#endif
+
+  // Get the maximum number of FDs possible.
+  struct rlimit nofile;
+  rlim_t max_fds;
+  if (getrlimit(RLIMIT_NOFILE, &nofile)) {
+    // getrlimit failed. Take a best guess.
+    max_fds = kSystemDefaultMaxFds;
+    DLOG(ERROR) << "getrlimit(RLIMIT_NOFILE) failed: " << errno;
+  } else {
+    max_fds = nofile.rlim_cur;
+  }
+
+  if (max_fds > INT_MAX) max_fds = INT_MAX;
+
+  DirReaderPosix fd_dir(kFDDir);
+
+  if (!fd_dir.IsValid()) {
+    // Fallback case: Try every possible fd.
+    for (rlim_t i = 0; i < max_fds; ++i) {
+      const int fd = static_cast<int>(i);
+      if (fd == STDIN_FILENO || fd == STDOUT_FILENO || fd == STDERR_FILENO ||
+          aShouldPreserve(aCtx, fd)) {
+        continue;
+      }
+
+      // Since we're just trying to close anything we can find,
+      // ignore any error return values of close().
+      close(fd);
+    }
+    return;
+  }
+
+  const int dir_fd = fd_dir.fd();
+
+  for (; fd_dir.Next();) {
+    // Skip . and .. entries.
+    if (fd_dir.name()[0] == '.') continue;
+
+    char* endptr;
+    errno = 0;
+    const long int fd = strtol(fd_dir.name(), &endptr, 10);
+    if (fd_dir.name()[0] == 0 || *endptr || fd < 0 || errno) continue;
+    if (fd == dir_fd) continue;
+    if (fd == STDIN_FILENO || fd == STDOUT_FILENO || fd == STDERR_FILENO ||
+        aShouldPreserve(aCtx, fd)) {
+      continue;
+    }
+
+    // When running under Valgrind, Valgrind opens several FDs for its
+    // own use and will complain if we try to close them.  All of
+    // these FDs are >= |max_fds|, so we can check against that here
+    // before closing.  See https://bugs.kde.org/show_bug.cgi?id=191758
+    if (fd < static_cast<int>(max_fds)) {
+      int ret = IGNORE_EINTR(close(fd));
+      if (ret != 0) {
+        DLOG(ERROR) << "Problem closing fd";
+      }
+    }
+  }
+}
+
+bool IsProcessDead(ProcessHandle handle, bool blocking) {
+  auto handleForkServer = [handle]() -> mozilla::Maybe<bool> {
+#ifdef MOZ_ENABLE_FORKSERVER
+    if (errno == ECHILD && mozilla::ipc::ForkServiceChild::Get()) {
+      // We only know if a process exists, but not if it has crashed.
+      //
+      // Since content processes are not direct children of the chrome
+      // process any more, it is impossible to use |waitpid()| to wait for
+      // them.
+      const int r = kill(handle, 0);
+      // FIXME: for unexpected errors we should probably log a warning
+      // and return true, so that the caller doesn't loop / hang /
+      // try to kill the process.  (Bug 1658072 will rewrite this code.)
+      return mozilla::Some(r < 0 && errno == ESRCH);
+    }
+#else
+    mozilla::Unused << handle;
+#endif
+    return mozilla::Nothing();
+  };
+
+#ifdef HAVE_WAITID
+
+  // We use `WNOWAIT` to read the process status without
+  // side-effecting it, in case it's something unexpected like a
+  // ptrace-stop for the crash reporter.  If is an exit, the call is
+  // reissued (see the end of this function) without that flag in
+  // order to collect the process.
+  siginfo_t si{};
+  const int wflags = WEXITED | WNOWAIT | (blocking ? 0 : WNOHANG);
+  int result = HANDLE_EINTR(waitid(P_PID, handle, &si, wflags));
+  if (result == -1) {
+    if (auto forkServerReturn = handleForkServer()) {
+      return *forkServerReturn;
+    }
+
+    // This shouldn't happen, but sometimes it does.  The error is
+    // probably ECHILD and the reason is probably that a pid was
+    // waited on again after a previous wait reclaimed its zombie.
+    // (It could also occur if the process isn't a direct child, but
+    // don't do that.)  This is bad, because it risks interfering with
+    // an unrelated child process if the pid is reused.
+    //
+    // So, lacking reliable information, we indicate that the process
+    // is dead, in the hope that the caller will give up and stop
+    // calling us.  See also bug 943174 and bug 933680.
+    CHROMIUM_LOG(ERROR) << "waitid failed pid:" << handle << " errno:" << errno;
+    return true;
+  }
+
+  if (si.si_pid == 0) {
+    // the child hasn't exited yet.
+    return false;
+  }
+
+  DCHECK(si.si_pid == handle);
+  switch (si.si_code) {
+    case CLD_STOPPED:
+    case CLD_CONTINUED:
+      DCHECK(false) << "waitid returned an event type that it shouldn't have";
+      [[fallthrough]];
+    case CLD_TRAPPED:
+      CHROMIUM_LOG(WARNING) << "ignoring non-exit event for process " << handle;
+      return false;
+
+    case CLD_KILLED:
+    case CLD_DUMPED:
+      CHROMIUM_LOG(WARNING)
+          << "process " << handle << " exited on signal " << si.si_status;
+      break;
+
+    case CLD_EXITED:
+      if (si.si_status != 0) {
+        CHROMIUM_LOG(WARNING)
+            << "process " << handle << " exited with status " << si.si_status;
+      }
+      break;
+
+    default:
+      CHROMIUM_LOG(ERROR) << "unexpected waitid si_code value: " << si.si_code;
+      DCHECK(false);
+      // This shouldn't happen, but assume that the process exited to
+      // avoid the caller possibly ending up in a loop.
+  }
+
+  // Now consume the status / collect the dead process
+  const int old_si_code = si.si_code;
+  si.si_pid = 0;
+  // In theory it shouldn't matter either way if we use `WNOHANG` at
+  // this point, but just in case, avoid unexpected blocking.
+  result = HANDLE_EINTR(waitid(P_PID, handle, &si, WEXITED | WNOHANG));
+  DCHECK(result == 0);
+  DCHECK(si.si_pid == handle);
+  DCHECK(si.si_code == old_si_code);
+  return true;
+
+#else  // no waitid
+
+  int status;
+  const int result = waitpid(handle, &status, blocking ? 0 : WNOHANG);
+  if (result == -1) {
+    if (auto forkServerReturn = handleForkServer()) {
+      return *forkServerReturn;
+    }
+
+    CHROMIUM_LOG(ERROR) << "waitpid failed pid:" << handle
+                        << " errno:" << errno;
+    return true;
+  }
+  if (result == 0) {
+    return false;
+  }
+
+  if (WIFEXITED(status) && WEXITSTATUS(status) != 0) {
+    CHROMIUM_LOG(WARNING) << "process " << handle << " exited with status "
+                          << WEXITSTATUS(status);
+  } else if (WIFSIGNALED(status)) {
+    CHROMIUM_LOG(WARNING) << "process " << handle << " exited on signal "
+                          << WTERMSIG(status);
+  }
+  return true;
+
+#endif  // waitid
+}
+
+void FreeEnvVarsArray::operator()(char** array) {
+  for (char** varPtr = array; *varPtr != nullptr; ++varPtr) {
+    free(*varPtr);
+  }
+  delete[] array;
+}
+
+EnvironmentArray BuildEnvironmentArray(const environment_map& env_vars_to_set) {
+  base::environment_map combined_env_vars = env_vars_to_set;
+  char** environ = PR_DuplicateEnvironment();
+  for (char** varPtr = environ; *varPtr != nullptr; ++varPtr) {
+    std::string varString = *varPtr;
+    size_t equalPos = varString.find_first_of('=');
+    std::string varName = varString.substr(0, equalPos);
+    std::string varValue = varString.substr(equalPos + 1);
+    if (combined_env_vars.find(varName) == combined_env_vars.end()) {
+      combined_env_vars[varName] = varValue;
+    }
+    PR_Free(*varPtr);  // PR_DuplicateEnvironment() uses PR_Malloc().
+  }
+  PR_Free(environ);  // PR_DuplicateEnvironment() uses PR_Malloc().
+
+  EnvironmentArray array(new char*[combined_env_vars.size() + 1]);
+  size_t i = 0;
+  for (const auto& key_val : combined_env_vars) {
+    std::string entry(key_val.first);
+    entry += "=";
+    entry += key_val.second;
+    array[i] = strdup(entry.c_str());
+    i++;
+  }
+  array[i] = nullptr;
+  return array;
+}
+
+}  // namespace base
+
+namespace mozilla {
+
+EnvironmentLog::EnvironmentLog(const char* varname, size_t len) {
+  const char* e = getenv(varname);
+  if (e && *e) {
+    fname_ = e;
+  }
+}
+
+void EnvironmentLog::print(const char* format, ...) {
+  if (!fname_.size()) return;
+
+  FILE* f;
+  if (fname_.compare("-") == 0) {
+    f = fdopen(dup(STDOUT_FILENO), "a");
+  } else {
+    f = fopen(fname_.c_str(), "a");
+  }
+
+  if (!f) return;
+
+  va_list a;
+  va_start(a, format);
+  vfprintf(f, format, a);
+  va_end(a);
+  fclose(f);
+}
+
+}  // namespace mozilla
diff --git a/ipc/chromium/src/base/process_util_win.cc b/ipc/chromium/src/base/process_util_win.cc
new file mode 100644
index 0000000000..5bfbc3eee5
--- /dev/null
+++ b/ipc/chromium/src/base/process_util_win.cc
@@ -0,0 +1,396 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// We need extended process and thread attribute support
+#undef _WIN32_WINNT
+#define _WIN32_WINNT 0x0600
+
+#include "base/process_util.h"
+
+#include <windows.h>
+#include <winternl.h>
+#include <psapi.h>
+#include <io.h>
+#ifndef STDOUT_FILENO
+#  define STDOUT_FILENO 1
+#endif
+
+#include "base/command_line.h"
+#include "base/histogram.h"
+#include "base/logging.h"
+#include "base/win_util.h"
+
+#include "mozilla/ipc/LaunchError.h"
+#include "mozilla/Result.h"
+
+#include <algorithm>
+#include <stdio.h>
+#include <stdlib.h>
+
+namespace {
+
+typedef BOOL(WINAPI* InitializeProcThreadAttributeListFn)(
+    LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList, DWORD dwAttributeCount,
+    DWORD dwFlags, PSIZE_T lpSize);
+
+typedef BOOL(WINAPI* DeleteProcThreadAttributeListFn)(
+    LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList);
+
+typedef BOOL(WINAPI* UpdateProcThreadAttributeFn)(
+    LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList, DWORD dwFlags,
+    DWORD_PTR Attribute, PVOID lpValue, SIZE_T cbSize, PVOID lpPreviousValue,
+    PSIZE_T lpReturnSize);
+
+static InitializeProcThreadAttributeListFn InitializeProcThreadAttributeListPtr;
+static DeleteProcThreadAttributeListFn DeleteProcThreadAttributeListPtr;
+static UpdateProcThreadAttributeFn UpdateProcThreadAttributePtr;
+
+static mozilla::EnvironmentLog gProcessLog("MOZ_PROCESS_LOG");
+
+}  // namespace
+
+namespace base {
+
+ProcessId GetCurrentProcId() { return ::GetCurrentProcessId(); }
+
+ProcessHandle GetCurrentProcessHandle() { return ::GetCurrentProcess(); }
+
+bool OpenProcessHandle(ProcessId pid, ProcessHandle* handle) {
+  // TODO(phajdan.jr): Take even more permissions out of this list.
+  ProcessHandle result =
+      OpenProcess(PROCESS_DUP_HANDLE | PROCESS_TERMINATE |
+                      PROCESS_QUERY_INFORMATION | SYNCHRONIZE,
+                  FALSE, pid);
+
+  if (result == NULL) {
+    return false;
+  }
+
+  *handle = result;
+  return true;
+}
+
+bool OpenPrivilegedProcessHandle(ProcessId pid, ProcessHandle* handle) {
+  ProcessHandle result =
+      OpenProcess(PROCESS_DUP_HANDLE | PROCESS_TERMINATE |
+                      PROCESS_QUERY_INFORMATION | PROCESS_VM_READ | SYNCHRONIZE,
+                  FALSE, pid);
+
+  if (result == NULL) {
+    return false;
+  }
+
+  *handle = result;
+  return true;
+}
+
+void CloseProcessHandle(ProcessHandle process) {
+  // closing a handle twice on Windows can be catastrophic - after the first
+  // close the handle value may be reused, so the second close will kill that
+  // other new handle.
+  BOOL ok = CloseHandle(process);
+  DCHECK(ok);
+}
+
+ProcessId GetProcId(ProcessHandle process) {
+  if (process == base::kInvalidProcessHandle || process == nullptr) {
+    return 0;
+  }
+  // This returns 0 if we have insufficient rights to query the process handle.
+  // Invalid handles or non-process handles will cause a diagnostic assert.
+  ProcessId result = GetProcessId(process);
+#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
+  CHECK(result != 0 || GetLastError() != ERROR_INVALID_HANDLE)
+  << "process handle = " << process;
+#endif
+  return result;
+}
+
+// from sandbox_policy_base.cc in a later version of the chromium ipc code...
+bool IsInheritableHandle(HANDLE handle) {
+  if (!handle) return false;
+  if (handle == INVALID_HANDLE_VALUE) return false;
+  // File handles (FILE_TYPE_DISK) and pipe handles are known to be
+  // inheritable.  Console handles (FILE_TYPE_CHAR) are not
+  // inheritable via PROC_THREAD_ATTRIBUTE_HANDLE_LIST.
+  DWORD handle_type = GetFileType(handle);
+  return handle_type == FILE_TYPE_DISK || handle_type == FILE_TYPE_PIPE;
+}
+
+void LoadThreadAttributeFunctions() {
+  HMODULE kernel32 = GetModuleHandle(L"kernel32.dll");
+  InitializeProcThreadAttributeListPtr =
+      reinterpret_cast<InitializeProcThreadAttributeListFn>(
+          GetProcAddress(kernel32, "InitializeProcThreadAttributeList"));
+  DeleteProcThreadAttributeListPtr =
+      reinterpret_cast<DeleteProcThreadAttributeListFn>(
+          GetProcAddress(kernel32, "DeleteProcThreadAttributeList"));
+  UpdateProcThreadAttributePtr = reinterpret_cast<UpdateProcThreadAttributeFn>(
+      GetProcAddress(kernel32, "UpdateProcThreadAttribute"));
+}
+
+// Creates and returns a "thread attribute list" to pass to the child process.
+// On return, is a pointer to a THREAD_ATTRIBUTE_LIST or NULL if either the
+// functions we need aren't available (eg, XP or earlier) or the functions we
+// need failed.
+// The result of this function must be passed to FreeThreadAttributeList.
+// Note that the pointer to the HANDLE array ends up embedded in the result of
+// this function and must stay alive until FreeThreadAttributeList is called,
+// hence it is passed in so the owner is the caller of this function.
+LPPROC_THREAD_ATTRIBUTE_LIST CreateThreadAttributeList(HANDLE* handlesToInherit,
+                                                       int handleCount) {
+  if (!InitializeProcThreadAttributeListPtr ||
+      !DeleteProcThreadAttributeListPtr || !UpdateProcThreadAttributePtr)
+    LoadThreadAttributeFunctions();
+  // shouldn't happen as we are only called for Vista+, but better safe than
+  // sorry...
+  if (!InitializeProcThreadAttributeListPtr ||
+      !DeleteProcThreadAttributeListPtr || !UpdateProcThreadAttributePtr)
+    return NULL;
+
+  SIZE_T threadAttrSize;
+  LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList = NULL;
+
+  if (!(*InitializeProcThreadAttributeListPtr)(NULL, 1, 0, &threadAttrSize) &&
+      GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+    goto fail;
+  lpAttributeList =
+      reinterpret_cast<LPPROC_THREAD_ATTRIBUTE_LIST>(malloc(threadAttrSize));
+  if (!lpAttributeList || !(*InitializeProcThreadAttributeListPtr)(
+                              lpAttributeList, 1, 0, &threadAttrSize))
+    goto fail;
+
+  if (!(*UpdateProcThreadAttributePtr)(
+          lpAttributeList, 0, PROC_THREAD_ATTRIBUTE_HANDLE_LIST,
+          handlesToInherit, sizeof(handlesToInherit[0]) * handleCount, NULL,
+          NULL)) {
+    (*DeleteProcThreadAttributeListPtr)(lpAttributeList);
+    goto fail;
+  }
+  return lpAttributeList;
+
+fail:
+  if (lpAttributeList) free(lpAttributeList);
+  return NULL;
+}
+
+// Frees the data returned by CreateThreadAttributeList.
+void FreeThreadAttributeList(LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList) {
+  // must be impossible to get a NULL DeleteProcThreadAttributeListPtr, as
+  // we already checked it existed when creating the data we are now freeing.
+  (*DeleteProcThreadAttributeListPtr)(lpAttributeList);
+  free(lpAttributeList);
+}
+
+// The next two functions are from chromium/base/environment.cc
+//
+// Parses a null-terminated input string of an environment block. The key is
+// placed into the given string, and the total length of the line, including
+// the terminating null, is returned.
+static size_t ParseEnvLine(const NativeEnvironmentString::value_type* input,
+                           NativeEnvironmentString* key) {
+  // Skip to the equals or end of the string, this is the key.
+  size_t cur = 0;
+  while (input[cur] && input[cur] != '=') cur++;
+  *key = NativeEnvironmentString(&input[0], cur);
+
+  // Now just skip to the end of the string.
+  while (input[cur]) cur++;
+  return cur + 1;
+}
+
+std::wstring AlterEnvironment(const wchar_t* env,
+                              const EnvironmentMap& changes) {
+  std::wstring result;
+
+  // First copy all unmodified values to the output.
+  size_t cur_env = 0;
+  std::wstring key;
+  while (env[cur_env]) {
+    const wchar_t* line = &env[cur_env];
+    size_t line_length = ParseEnvLine(line, &key);
+
+    // Keep only values not specified in the change vector.
+    EnvironmentMap::const_iterator found_change = changes.find(key);
+    if (found_change == changes.end()) result.append(line, line_length);
+
+    cur_env += line_length;
+  }
+
+  // Now append all modified and new values.
+  for (EnvironmentMap::const_iterator i = changes.begin(); i != changes.end();
+       ++i) {
+    if (!i->second.empty()) {
+      result.append(i->first);
+      result.push_back('=');
+      result.append(i->second);
+      result.push_back(0);
+    }
+  }
+
+  // An additional null marks the end of the list. We always need a double-null
+  // in case nothing was added above.
+  if (result.empty()) result.push_back(0);
+  result.push_back(0);
+  return result;
+}
+
+Result<Ok, LaunchError> LaunchApp(const std::wstring& cmdline,
+                                  const LaunchOptions& options,
+                                  ProcessHandle* process_handle) {
+  // We want to inherit the std handles so dump() statements and assertion
+  // messages in the child process can be seen - but we *do not* want to
+  // blindly have all handles inherited.  Vista and later has a technique
+  // where only specified handles are inherited - so we use this technique.
+  // If that fails we just don't inherit anything.
+  DWORD dwCreationFlags = 0;
+  BOOL bInheritHandles = FALSE;
+
+  // We use a STARTUPINFOEX, but if we can't do the thread attribute thing, we
+  // just pass the size of a STARTUPINFO.
+  STARTUPINFOEX startup_info_ex;
+  ZeroMemory(&startup_info_ex, sizeof(startup_info_ex));
+  STARTUPINFO& startup_info = startup_info_ex.StartupInfo;
+  startup_info.cb = sizeof(startup_info);
+  startup_info.dwFlags = STARTF_USESHOWWINDOW | STARTF_FORCEOFFFEEDBACK;
+  startup_info.wShowWindow = options.start_hidden ? SW_HIDE : SW_SHOW;
+
+  // Per the comment in CreateThreadAttributeList, lpAttributeList will contain
+  // a pointer to handlesToInherit, so make sure they have the same lifetime.
+  LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList = NULL;
+  std::vector<HANDLE> handlesToInherit;
+  for (HANDLE h : options.handles_to_inherit) {
+    if (SetHandleInformation(h, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT) ==
+        0) {
+      MOZ_DIAGNOSTIC_ASSERT(false, "SetHandleInformation failed");
+      return Err(LaunchError("SetHandleInformation", GetLastError()));
+    }
+    handlesToInherit.push_back(h);
+  }
+
+  // setup our handle array first - if we end up with no handles that can
+  // be inherited we can avoid trying to do the ThreadAttributeList dance...
+  HANDLE stdOut = ::GetStdHandle(STD_OUTPUT_HANDLE);
+  HANDLE stdErr = ::GetStdHandle(STD_ERROR_HANDLE);
+
+  if (IsInheritableHandle(stdOut)) handlesToInherit.push_back(stdOut);
+  if (stdErr != stdOut && IsInheritableHandle(stdErr))
+    handlesToInherit.push_back(stdErr);
+
+  if (!handlesToInherit.empty()) {
+    lpAttributeList = CreateThreadAttributeList(handlesToInherit.data(),
+                                                handlesToInherit.size());
+    if (lpAttributeList) {
+      // it's safe to inherit handles, so arrange for that...
+      startup_info.cb = sizeof(startup_info_ex);
+      startup_info.dwFlags |= STARTF_USESTDHANDLES;
+      startup_info.hStdOutput = stdOut;
+      startup_info.hStdError = stdErr;
+      startup_info.hStdInput = INVALID_HANDLE_VALUE;
+      startup_info_ex.lpAttributeList = lpAttributeList;
+      dwCreationFlags |= EXTENDED_STARTUPINFO_PRESENT;
+      bInheritHandles = TRUE;
+    }
+  }
+
+  dwCreationFlags |= CREATE_UNICODE_ENVIRONMENT;
+  if (options.start_independent) {
+    dwCreationFlags |= CREATE_BREAKAWAY_FROM_JOB;
+  }
+
+  LPTCH original_environment = GetEnvironmentStrings();
+  base::NativeEnvironmentString new_environment =
+      AlterEnvironment(original_environment, options.env_map);
+  // Ignore return value? What can we do?
+  FreeEnvironmentStrings(original_environment);
+  LPVOID new_env_ptr = (void*)new_environment.data();
+
+  PROCESS_INFORMATION process_info;
+
+  BOOL createdOK = CreateProcess(
+      NULL, const_cast<wchar_t*>(cmdline.c_str()), NULL, NULL, bInheritHandles,
+      dwCreationFlags, new_env_ptr, NULL, &startup_info, &process_info);
+  if (lpAttributeList) FreeThreadAttributeList(lpAttributeList);
+  if (!createdOK) {
+    DLOG(WARNING) << "CreateProcess Failed: " << GetLastError();
+    return Err(LaunchError("CreateProcess", GetLastError()));
+  }
+
+  gProcessLog.print("==> process %d launched child process %d (%S)\n",
+                    GetCurrentProcId(), process_info.dwProcessId,
+                    cmdline.c_str());
+
+  // Handles must be closed or they will leak
+  CloseHandle(process_info.hThread);
+
+  if (options.wait) WaitForSingleObject(process_info.hProcess, INFINITE);
+
+  // If the caller wants the process handle, we won't close it.
+  if (process_handle) {
+    *process_handle = process_info.hProcess;
+  } else {
+    CloseHandle(process_info.hProcess);
+  }
+  return Ok();
+}
+
+Result<Ok, LaunchError> LaunchApp(const CommandLine& cl,
+                                  const LaunchOptions& options,
+                                  ProcessHandle* process_handle) {
+  return LaunchApp(cl.command_line_string(), options, process_handle);
+}
+
+bool KillProcess(ProcessHandle process, int exit_code) {
+  // INVALID_HANDLE_VALUE is not actually an invalid handle value, but
+  // instead is the value returned by GetCurrentProcess().  nullptr,
+  // in contrast, *is* an invalid handle value.  Both values are too
+  // easy to accidentally try to kill, and neither is legitimately
+  // used by this function's callers, so reject them.
+  if (!process || process == INVALID_HANDLE_VALUE) {
+    CHROMIUM_LOG(WARNING)
+        << "base::KillProcess refusing to terminate process handle " << process;
+    return false;
+  }
+  bool result = (TerminateProcess(process, exit_code) != FALSE);
+  if (!result) {
+    DLOG(ERROR) << "Unable to terminate process: " << GetLastError();
+  }
+  return result;
+}
+
+}  // namespace base
+
+namespace mozilla {
+
+EnvironmentLog::EnvironmentLog(const char* varname, size_t len) {
+  wchar_t wvarname[len];
+  std::copy(varname, varname + len, wvarname);
+  const wchar_t* e = _wgetenv(wvarname);
+  if (e && *e) {
+    fname_ = e;
+  }
+}
+
+void EnvironmentLog::print(const char* format, ...) {
+  if (!fname_.size()) return;
+
+  FILE* f;
+  if (fname_.compare(L"-") == 0) {
+    f = fdopen(dup(STDOUT_FILENO), "a");
+  } else {
+    f = _wfopen(fname_.c_str(), L"a");
+  }
+
+  if (!f) return;
+
+  va_list a;
+  va_start(a, format);
+  vfprintf(f, format, a);
+  va_end(a);
+  fclose(f);
+}
+
+}  // namespace mozilla
diff --git a/ipc/chromium/src/base/rand_util.cc b/ipc/chromium/src/base/rand_util.cc
new file mode 100644
index 0000000000..bf14baa5d4
--- /dev/null
+++ b/ipc/chromium/src/base/rand_util.cc
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/rand_util.h"
+
+#include <math.h>
+
+#include <limits>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "mozilla/RandomNum.h"
+
+namespace base {
+
+int RandInt(int min, int max) {
+  DCHECK(min <= max);
+
+  uint64_t range = static_cast<int64_t>(max) - min + 1;
+  mozilla::Maybe<uint64_t> number = mozilla::RandomUint64();
+  MOZ_RELEASE_ASSERT(number.isSome());
+  int result = min + static_cast<int>(number.value() % range);
+  DCHECK(result >= min && result <= max);
+  return result;
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/rand_util.h b/ipc/chromium/src/base/rand_util.h
new file mode 100644
index 0000000000..963fc69599
--- /dev/null
+++ b/ipc/chromium/src/base/rand_util.h
@@ -0,0 +1,19 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_RAND_UTIL_H_
+#define BASE_RAND_UTIL_H_
+
+#include "base/basictypes.h"
+
+namespace base {
+
+// Returns a random number between min and max (inclusive). Thread-safe.
+int RandInt(int min, int max);
+
+}  // namespace base
+
+#endif  // BASE_RAND_UTIL_H_
diff --git a/ipc/chromium/src/base/revocable_store.cc b/ipc/chromium/src/base/revocable_store.cc
new file mode 100644
index 0000000000..9a586a5a61
--- /dev/null
+++ b/ipc/chromium/src/base/revocable_store.cc
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/revocable_store.h"
+
+#include "base/logging.h"
+
+RevocableStore::Revocable::Revocable(RevocableStore* store)
+    : store_reference_(store->owning_reference_) {
+  // We AddRef() the owning reference.
+  DCHECK(store_reference_->store());
+  store_reference_->store()->Add(this);
+}
+
+RevocableStore::Revocable::~Revocable() {
+  if (!revoked()) {
+    // Notify the store of our destruction.
+    --(store_reference_->store()->count_);
+  }
+}
+
+RevocableStore::RevocableStore() : count_(0) {
+  // Create a new owning reference.
+  owning_reference_ = new StoreRef(this);
+}
+
+RevocableStore::~RevocableStore() {
+  // Revoke all the items in the store.
+  owning_reference_->set_store(NULL);
+}
+
+void RevocableStore::Add(Revocable* item) {
+  DCHECK(!item->revoked());
+  ++count_;
+}
+
+void RevocableStore::RevokeAll() {
+  // We revoke all the existing items in the store and reset our count.
+  owning_reference_->set_store(NULL);
+  count_ = 0;
+
+  // Then we create a new owning reference for new items that get added.
+  // This Release()s the old owning reference, allowing it to be freed after
+  // all the items that were in the store are eventually destroyed.
+  owning_reference_ = new StoreRef(this);
+}
diff --git a/ipc/chromium/src/base/revocable_store.h b/ipc/chromium/src/base/revocable_store.h
new file mode 100644
index 0000000000..ef2f5b6669
--- /dev/null
+++ b/ipc/chromium/src/base/revocable_store.h
@@ -0,0 +1,81 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_REVOCABLE_STORE_H_
+#define BASE_REVOCABLE_STORE_H_
+
+#include "base/basictypes.h"
+#include "nsISupportsImpl.h"
+
+// |RevocableStore| is a container of items that can be removed from the store.
+class RevocableStore {
+ public:
+  // A |StoreRef| is used to link the |RevocableStore| to its items.  There is
+  // one StoreRef per store, and each item holds a reference to it.  If the
+  // store wishes to revoke its items, it sets |store_| to null.  Items are
+  // permitted to release their reference to the |StoreRef| when they no longer
+  // require the store.
+  class StoreRef final {
+   public:
+    NS_INLINE_DECL_THREADSAFE_REFCOUNTING(StoreRef)
+    explicit StoreRef(RevocableStore* aStore) : store_(aStore) {}
+
+    void set_store(RevocableStore* aStore) { store_ = aStore; }
+    RevocableStore* store() const { return store_; }
+
+   protected:
+    ~StoreRef() {}
+
+   private:
+    RevocableStore* store_;
+
+    DISALLOW_EVIL_CONSTRUCTORS(StoreRef);
+  };
+
+  // An item in the store.  On construction, the object adds itself to the
+  // store.
+  class Revocable {
+   public:
+    explicit Revocable(RevocableStore* store);
+    ~Revocable();
+
+    // This item has been revoked if it no longer has a pointer to the store.
+    bool revoked() const { return !store_reference_->store(); }
+
+   private:
+    // We hold a reference to the store through this ref pointer.  We release
+    // this reference on destruction.
+    RefPtr<StoreRef> store_reference_;
+
+    DISALLOW_EVIL_CONSTRUCTORS(Revocable);
+  };
+
+  RevocableStore();
+  ~RevocableStore();
+
+  // Revokes all the items in the store.
+  void RevokeAll();
+
+  // Returns true if there are no items in the store.
+  bool empty() const { return count_ == 0; }
+
+ private:
+  friend class Revocable;
+
+  // Adds an item to the store.  To add an item to the store, construct it
+  // with a pointer to the store.
+  void Add(Revocable* item);
+
+  // This is the reference the unrevoked items in the store hold.
+  RefPtr<StoreRef> owning_reference_;
+
+  // The number of unrevoked items in the store.
+  int count_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(RevocableStore);
+};
+
+#endif  // BASE_REVOCABLE_STORE_H_
diff --git a/ipc/chromium/src/base/scoped_bstr_win.h b/ipc/chromium/src/base/scoped_bstr_win.h
new file mode 100644
index 0000000000..8cb07b9334
--- /dev/null
+++ b/ipc/chromium/src/base/scoped_bstr_win.h
@@ -0,0 +1,138 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_SCOPED_BSTR_WIN_H_
+#define BASE_SCOPED_BSTR_WIN_H_
+
+#include "base/basictypes.h"  // needed to pick up OS_WIN
+
+#include "base/logging.h"
+
+#include <windows.h>
+#include <oleauto.h>
+
+// Manages a BSTR string pointer.
+// The class interface is based on scoped_ptr.
+class ScopedBstr {
+ public:
+  ScopedBstr() : bstr_(NULL) {}
+
+  // Constructor to create a new BSTR.
+  // NOTE: Do not pass a BSTR to this constructor expecting ownership to
+  // be transferred - even though it compiles! ;-)
+  explicit ScopedBstr(const wchar_t* non_bstr);
+  ~ScopedBstr();
+
+  // Give ScopedBstr ownership over an already allocated BSTR or NULL.
+  // If you need to allocate a new BSTR instance, use |allocate| instead.
+  void Reset(BSTR bstr = NULL);
+
+  // Releases ownership of the BSTR to the caller.
+  BSTR Release();
+
+  // Creates a new BSTR from a wide string.
+  // If you already have a BSTR and want to transfer ownership to the
+  // ScopedBstr instance, call |reset| instead.
+  // Returns a pointer to the new BSTR, or NULL if allocation failed.
+  BSTR Allocate(const wchar_t* wide_str);
+
+  // Allocates a new BSTR with the specified number of bytes.
+  // Returns a pointer to the new BSTR, or NULL if allocation failed.
+  BSTR AllocateBytes(int bytes);
+
+  // Sets the allocated length field of the already-allocated BSTR to be
+  // |bytes|.  This is useful when the BSTR was preallocated with e.g.
+  // SysAllocStringLen or SysAllocStringByteLen (call |AllocateBytes|) and
+  // then not all the bytes are being used.
+  // Note that if you want to set the length to a specific number of characters,
+  // you need to multiply by sizeof(wchar_t).  Oddly, there's no public API to
+  // set the length, so we do this ourselves by hand.
+  //
+  // NOTE: The actual allocated size of the BSTR MUST be >= bytes.
+  //  That responsibility is with the caller.
+  void SetByteLen(uint32_t bytes);
+
+  // Swap values of two ScopedBstr's.
+  void Swap(ScopedBstr& bstr2);
+
+  // Retrieves the pointer address.
+  // Used to receive BSTRs as out arguments (and take ownership).
+  // The function DCHECKs on the current value being NULL.
+  // Usage: GetBstr(bstr.Receive());
+  BSTR* Receive();
+
+  // Returns number of chars in the BSTR.
+  uint32_t Length() const;
+
+  // Returns the number of bytes allocated for the BSTR.
+  uint32_t ByteLength() const;
+
+  operator BSTR() const { return bstr_; }
+
+ protected:
+  BSTR bstr_;
+
+ private:
+  // Forbid comparison of ScopedBstr types.  You should never have the same
+  // BSTR owned by two different scoped_ptrs.
+  bool operator==(const ScopedBstr& bstr2) const;
+  bool operator!=(const ScopedBstr& bstr2) const;
+  DISALLOW_COPY_AND_ASSIGN(ScopedBstr);
+};
+
+// Template class to generate a BSTR from a static wide string
+// without touching the heap.  Use this class via the StackBstrVar and
+// StackBstr macros.
+template <uint32_t string_bytes>
+class StackBstrT {
+ public:
+  // Try to stay as const as we can in an attempt to avoid someone
+  // using the class incorrectly (e.g. by supplying a variable instead
+  // of a verbatim string.  We also have an assert in the constructor
+  // as an extra runtime check since the const-ness only catches one case.
+  explicit StackBstrT(const wchar_t* const str) {
+    // The BSTR API uses UINT, but we prefer uint32_t.
+    // Make sure we'll know about it if these types don't match.
+    COMPILE_ASSERT(sizeof(uint32_t) == sizeof(UINT), UintToUint32);
+    COMPILE_ASSERT(sizeof(wchar_t) == sizeof(OLECHAR), WcharToOlechar);
+
+    // You shouldn't pass string pointers to this constructor since
+    // there's no way for the compiler to calculate the length of the
+    // string (string_bytes will be equal to pointer size in those cases).
+    DCHECK(lstrlenW(str) == (string_bytes / sizeof(bstr_.str_[0])) - 1)
+        << "not expecting a string pointer";
+    memcpy(bstr_.str_, str, string_bytes);
+    bstr_.len_ = string_bytes - sizeof(wchar_t);
+  }
+
+  operator BSTR() { return bstr_.str_; }
+
+ protected:
+  struct BstrInternal {
+    uint32_t len_;
+    wchar_t str_[string_bytes / sizeof(wchar_t)];
+  } bstr_;
+};
+
+// Use this macro to generate an inline BSTR from a wide string.
+// This is about 6 times faster than using the SysAllocXxx functions to
+// allocate a BSTR and helps with keeping heap fragmentation down.
+// Example:
+//  DoBstrStuff(StackBstr(L"This is my BSTR"));
+// Where DoBstrStuff is:
+//  HRESULT DoBstrStuff(BSTR bstr) { ... }
+#define StackBstr(str) static_cast<BSTR>(StackBstrT<sizeof(str)>(str))
+
+// If you need a named BSTR variable that's based on a fixed string
+// (e.g. if the BSTR is used inside a loop or more than one place),
+// use StackBstrVar to declare a variable.
+// Example:
+//   StackBstrVar(L"my_property", myprop);
+//   for (int i = 0; i < objects.length(); ++i)
+//     ProcessValue(objects[i].GetProp(myprop));  // GetProp accepts BSTR
+#define StackBstrVar(str, var) StackBstrT<sizeof(str)> var(str)
+
+#endif  // BASE_SCOPED_BSTR_WIN_H_
diff --git a/ipc/chromium/src/base/scoped_cftyperef.h b/ipc/chromium/src/base/scoped_cftyperef.h
new file mode 100644
index 0000000000..9cd3cfa967
--- /dev/null
+++ b/ipc/chromium/src/base/scoped_cftyperef.h
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_SCOPED_CFTYPEREF_H_
+#define BASE_SCOPED_CFTYPEREF_H_
+
+#include <CoreFoundation/CoreFoundation.h>
+#include "base/basictypes.h"
+
+// scoped_cftyperef<> is patterned after scoped_ptr<>, but maintains ownership
+// of a CoreFoundation object: any object that can be represented as a
+// CFTypeRef.  Style deviations here are solely for compatibility with
+// scoped_ptr<>'s interface, with which everyone is already familiar.
+//
+// When scoped_cftyperef<> takes ownership of an object (in the constructor or
+// in reset()), it takes over the caller's existing ownership claim.  The
+// caller must own the object it gives to scoped_cftyperef<>, and relinquishes
+// an ownership claim to that object.  scoped_cftyperef<> does not call
+// CFRetain().
+template <typename CFT>
+class scoped_cftyperef {
+ public:
+  typedef CFT element_type;
+
+  explicit scoped_cftyperef(CFT object = NULL) : object_(object) {}
+
+  ~scoped_cftyperef() {
+    if (object_) CFRelease(object_);
+  }
+
+  void reset(CFT object = NULL) {
+    if (object_) CFRelease(object_);
+    object_ = object;
+  }
+
+  bool operator==(CFT that) const { return object_ == that; }
+
+  bool operator!=(CFT that) const { return object_ != that; }
+
+  operator CFT() const { return object_; }
+
+  CFT get() const { return object_; }
+
+  void swap(scoped_cftyperef& that) {
+    CFT temp = that.object_;
+    that.object_ = object_;
+    object_ = temp;
+  }
+
+  // scoped_cftyperef<>::release() is like scoped_ptr<>::release.  It is NOT
+  // a wrapper for CFRelease().  To force a scoped_cftyperef<> object to call
+  // CFRelease(), use scoped_cftyperef<>::reset().
+  CFT release() {
+    CFT temp = object_;
+    object_ = NULL;
+    return temp;
+  }
+
+ private:
+  CFT object_;
+
+  DISALLOW_COPY_AND_ASSIGN(scoped_cftyperef);
+};
+
+#endif  // BASE_SCOPED_CFTYPEREF_H_
diff --git a/ipc/chromium/src/base/scoped_handle.h b/ipc/chromium/src/base/scoped_handle.h
new file mode 100644
index 0000000000..931105e535
--- /dev/null
+++ b/ipc/chromium/src/base/scoped_handle.h
@@ -0,0 +1,52 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_SCOPED_HANDLE_H_
+#define BASE_SCOPED_HANDLE_H_
+
+#include <stdio.h>
+
+#include "base/basictypes.h"
+
+#if defined(OS_WIN)
+#  include "base/scoped_handle_win.h"
+#endif
+
+class ScopedStdioHandle {
+ public:
+  ScopedStdioHandle() : handle_(NULL) {}
+
+  explicit ScopedStdioHandle(FILE* handle) : handle_(handle) {}
+
+  ~ScopedStdioHandle() { Close(); }
+
+  void Close() {
+    if (handle_) {
+      fclose(handle_);
+      handle_ = NULL;
+    }
+  }
+
+  FILE* get() const { return handle_; }
+
+  FILE* Take() {
+    FILE* temp = handle_;
+    handle_ = NULL;
+    return temp;
+  }
+
+  void Set(FILE* newhandle) {
+    Close();
+    handle_ = newhandle;
+  }
+
+ private:
+  FILE* handle_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(ScopedStdioHandle);
+};
+
+#endif  // BASE_SCOPED_HANDLE_H_
diff --git a/ipc/chromium/src/base/scoped_handle_win.h b/ipc/chromium/src/base/scoped_handle_win.h
new file mode 100644
index 0000000000..e8e419b7c5
--- /dev/null
+++ b/ipc/chromium/src/base/scoped_handle_win.h
@@ -0,0 +1,193 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_SCOPED_HANDLE_WIN_H_
+#define BASE_SCOPED_HANDLE_WIN_H_
+
+#include <windows.h>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+
+// Used so we always remember to close the handle.
+// The class interface matches that of ScopedStdioHandle in  addition to an
+// IsValid() method since invalid handles on windows can be either NULL or
+// INVALID_HANDLE_VALUE (-1).
+//
+// Example:
+//   ScopedHandle hfile(CreateFile(...));
+//   if (!hfile.Get())
+//     ...process error
+//   ReadFile(hfile.Get(), ...);
+//
+// To sqirrel the handle away somewhere else:
+//   secret_handle_ = hfile.Take();
+//
+// To explicitly close the handle:
+//   hfile.Close();
+class ScopedHandle {
+ public:
+  ScopedHandle() : handle_(NULL) {}
+
+  explicit ScopedHandle(HANDLE h) : handle_(NULL) { Set(h); }
+
+  ~ScopedHandle() { Close(); }
+
+  // Use this instead of comparing to INVALID_HANDLE_VALUE to pick up our NULL
+  // usage for errors.
+  bool IsValid() const { return handle_ != NULL; }
+
+  void Set(HANDLE new_handle) {
+    Close();
+
+    // Windows is inconsistent about invalid handles, so we always use NULL
+    if (new_handle != INVALID_HANDLE_VALUE) handle_ = new_handle;
+  }
+
+  HANDLE Get() { return handle_; }
+
+  operator HANDLE() { return handle_; }
+
+  HANDLE Take() {
+    // transfers ownership away from this object
+    HANDLE h = handle_;
+    handle_ = NULL;
+    return h;
+  }
+
+  void Close() {
+    if (handle_) {
+      if (!::CloseHandle(handle_)) {
+        NOTREACHED();
+      }
+      handle_ = NULL;
+    }
+  }
+
+ private:
+  HANDLE handle_;
+  DISALLOW_EVIL_CONSTRUCTORS(ScopedHandle);
+};
+
+// Like ScopedHandle, but for HANDLEs returned from FindFile().
+class ScopedFindFileHandle {
+ public:
+  explicit ScopedFindFileHandle(HANDLE handle) : handle_(handle) {
+    // Windows is inconsistent about invalid handles, so we always use NULL
+    if (handle_ == INVALID_HANDLE_VALUE) handle_ = NULL;
+  }
+
+  ~ScopedFindFileHandle() {
+    if (handle_) FindClose(handle_);
+  }
+
+  // Use this instead of comparing to INVALID_HANDLE_VALUE to pick up our NULL
+  // usage for errors.
+  bool IsValid() const { return handle_ != NULL; }
+
+  operator HANDLE() { return handle_; }
+
+ private:
+  HANDLE handle_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(ScopedFindFileHandle);
+};
+
+// Like ScopedHandle but for HDC.  Only use this on HDCs returned from
+// CreateCompatibleDC.  For an HDC returned by GetDC, use ReleaseDC instead.
+class ScopedHDC {
+ public:
+  ScopedHDC() : hdc_(NULL) {}
+  explicit ScopedHDC(HDC h) : hdc_(h) {}
+
+  ~ScopedHDC() { Close(); }
+
+  HDC Get() { return hdc_; }
+
+  void Set(HDC h) {
+    Close();
+    hdc_ = h;
+  }
+
+  operator HDC() { return hdc_; }
+
+ private:
+  void Close() {
+#ifdef NOGDI
+    assert(false);
+#else
+    if (hdc_) DeleteDC(hdc_);
+#endif  // NOGDI
+  }
+
+  HDC hdc_;
+  DISALLOW_EVIL_CONSTRUCTORS(ScopedHDC);
+};
+
+// Like ScopedHandle but for GDI objects.
+template <class T>
+class ScopedGDIObject {
+ public:
+  ScopedGDIObject() : object_(NULL) {}
+  explicit ScopedGDIObject(T object) : object_(object) {}
+
+  ~ScopedGDIObject() { Close(); }
+
+  T Get() { return object_; }
+
+  void Set(T object) {
+    if (object_ && object != object_) Close();
+    object_ = object;
+  }
+
+  ScopedGDIObject& operator=(T object) {
+    Set(object);
+    return *this;
+  }
+
+  operator T() { return object_; }
+
+ private:
+  void Close() {
+    if (object_) DeleteObject(object_);
+  }
+
+  T object_;
+  DISALLOW_COPY_AND_ASSIGN(ScopedGDIObject);
+};
+
+// Typedefs for some common use cases.
+typedef ScopedGDIObject<HBITMAP> ScopedBitmap;
+typedef ScopedGDIObject<HRGN> ScopedHRGN;
+typedef ScopedGDIObject<HFONT> ScopedHFONT;
+
+// Like ScopedHandle except for HGLOBAL.
+template <class T>
+class ScopedHGlobal {
+ public:
+  explicit ScopedHGlobal(HGLOBAL glob) : glob_(glob) {
+    data_ = static_cast<T*>(GlobalLock(glob_));
+  }
+  ~ScopedHGlobal() { GlobalUnlock(glob_); }
+
+  T* get() { return data_; }
+
+  size_t Size() const { return GlobalSize(glob_); }
+
+  T* operator->() const {
+    assert(data_ != 0);
+    return data_;
+  }
+
+ private:
+  HGLOBAL glob_;
+
+  T* data_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(ScopedHGlobal);
+};
+
+#endif  // BASE_SCOPED_HANDLE_WIN_H_
diff --git a/ipc/chromium/src/base/scoped_nsautorelease_pool.h b/ipc/chromium/src/base/scoped_nsautorelease_pool.h
new file mode 100644
index 0000000000..26c032e949
--- /dev/null
+++ b/ipc/chromium/src/base/scoped_nsautorelease_pool.h
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_SCOPED_NSAUTORELEASE_POOL_H_
+#define BASE_SCOPED_NSAUTORELEASE_POOL_H_
+
+#include "base/basictypes.h"
+
+#if defined(OS_MACOSX)
+#  if defined(__OBJC__)
+@class NSAutoreleasePool;
+#  else   // __OBJC__
+class NSAutoreleasePool;
+#  endif  // __OBJC__
+#endif    // OS_MACOSX
+
+namespace base {
+
+// On the Mac, ScopedNSAutoreleasePool allocates an NSAutoreleasePool when
+// instantiated and sends it a -drain message when destroyed.  This allows an
+// autorelease pool to be maintained in ordinary C++ code without bringing in
+// any direct Objective-C dependency.
+//
+// On other platforms, ScopedNSAutoreleasePool is an empty object with no
+// effects.  This allows it to be used directly in cross-platform code without
+// ugly #ifdefs.
+class ScopedNSAutoreleasePool {
+ public:
+#if !defined(OS_MACOSX)
+  ScopedNSAutoreleasePool() {}
+  void Recycle() {}
+#else   // OS_MACOSX
+  ScopedNSAutoreleasePool();
+  ~ScopedNSAutoreleasePool();
+
+  // Clear out the pool in case its position on the stack causes it to be
+  // alive for long periods of time (such as the entire length of the app).
+  // Only use then when you're certain the items currently in the pool are
+  // no longer needed.
+  void Recycle();
+
+ private:
+  NSAutoreleasePool* autorelease_pool_;
+#endif  // OS_MACOSX
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScopedNSAutoreleasePool);
+};
+
+}  // namespace base
+
+#endif  // BASE_SCOPED_NSAUTORELEASE_POOL_H_
diff --git a/ipc/chromium/src/base/scoped_nsautorelease_pool.mm b/ipc/chromium/src/base/scoped_nsautorelease_pool.mm
new file mode 100644
index 0000000000..7cbaf8ba63
--- /dev/null
+++ b/ipc/chromium/src/base/scoped_nsautorelease_pool.mm
@@ -0,0 +1,28 @@
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/scoped_nsautorelease_pool.h"
+
+#import <Foundation/Foundation.h>
+
+#include "base/logging.h"
+
+namespace base {
+
+ScopedNSAutoreleasePool::ScopedNSAutoreleasePool()
+    : autorelease_pool_([[NSAutoreleasePool alloc] init]) {
+  DCHECK(autorelease_pool_);
+}
+
+ScopedNSAutoreleasePool::~ScopedNSAutoreleasePool() { [autorelease_pool_ drain]; }
+
+// Cycle the internal pool, allowing everything there to get cleaned up and
+// start anew.
+void ScopedNSAutoreleasePool::Recycle() {
+  [autorelease_pool_ drain];
+  autorelease_pool_ = [[NSAutoreleasePool alloc] init];
+  DCHECK(autorelease_pool_);
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/scoped_nsobject.h b/ipc/chromium/src/base/scoped_nsobject.h
new file mode 100644
index 0000000000..d1ef77d749
--- /dev/null
+++ b/ipc/chromium/src/base/scoped_nsobject.h
@@ -0,0 +1,66 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_SCOPED_NSOBJECT_H_
+#define BASE_SCOPED_NSOBJECT_H_
+
+#import <Foundation/Foundation.h>
+#include "base/basictypes.h"
+
+// scoped_nsobject<> is patterned after scoped_ptr<>, but maintains ownership
+// of an NSObject subclass object.  Style deviations here are solely for
+// compatibility with scoped_ptr<>'s interface, with which everyone is already
+// familiar.
+//
+// When scoped_nsobject<> takes ownership of an object (in the constructor or
+// in reset()), it takes over the caller's existing ownership claim.  The
+// caller must own the object it gives to scoped_nsobject<>, and relinquishes
+// an ownership claim to that object.  scoped_nsobject<> does not call
+// -retain.
+template <typename NST>
+class scoped_nsobject {
+ public:
+  typedef NST* element_type;
+
+  explicit scoped_nsobject(NST* object = nil) : object_(object) {}
+
+  ~scoped_nsobject() { [object_ release]; }
+
+  void reset(NST* object = nil) {
+    [object_ release];
+    object_ = object;
+  }
+
+  bool operator==(NST* that) const { return object_ == that; }
+
+  bool operator!=(NST* that) const { return object_ != that; }
+
+  operator NST*() const { return object_; }
+
+  NST* get() const { return object_; }
+
+  void swap(scoped_nsobject& that) {
+    NST* temp = that.object_;
+    that.object_ = object_;
+    object_ = temp;
+  }
+
+  // scoped_nsobject<>::release() is like scoped_ptr<>::release.  It is NOT
+  // a wrapper for [object_ release].  To force a scoped_nsobject<> object to
+  // call [object_ release], use scoped_nsobject<>::reset().
+  NST* release() {
+    NST* temp = object_;
+    object_ = nil;
+    return temp;
+  }
+
+ private:
+  NST* object_;
+
+  DISALLOW_COPY_AND_ASSIGN(scoped_nsobject);
+};
+
+#endif  // BASE_SCOPED_NSOBJECT_H_
diff --git a/ipc/chromium/src/base/shared_memory.h b/ipc/chromium/src/base/shared_memory.h
new file mode 100644
index 0000000000..ec3f9fc259
--- /dev/null
+++ b/ipc/chromium/src/base/shared_memory.h
@@ -0,0 +1,199 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_SHARED_MEMORY_H_
+#define BASE_SHARED_MEMORY_H_
+
+#include "build/build_config.h"
+
+#if defined(OS_POSIX)
+#  include <sys/types.h>
+#  include <semaphore.h>
+#endif
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/process.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/UniquePtrExtensions.h"
+
+namespace base {
+
+// SharedMemoryHandle is a platform specific type which represents
+// the underlying OS handle to a shared memory segment.
+typedef mozilla::UniqueFileHandle SharedMemoryHandle;
+
+// Platform abstraction for shared memory.  Provides a C++ wrapper
+// around the OS primitive for a memory mapped file.
+class SharedMemory {
+ public:
+  // Create a new SharedMemory object.
+  SharedMemory() = default;
+
+  // Create a new SharedMemory object from an existing, open
+  // shared memory file.
+  SharedMemory(SharedMemoryHandle init_handle, bool read_only)
+      : SharedMemory() {
+    SetHandle(std::move(init_handle), read_only);
+  }
+
+  // Move constructor; transfers ownership.
+  SharedMemory(SharedMemory&& other) = default;
+
+  // Destructor.  Will close any open files.
+  ~SharedMemory();
+
+  // Initialize a new SharedMemory object from an existing, open
+  // shared memory file.
+  bool SetHandle(SharedMemoryHandle handle, bool read_only);
+
+  // Return true iff the given handle is valid (i.e. not the distingished
+  // invalid value; NULL for a HANDLE and -1 for a file descriptor)
+  static bool IsHandleValid(const SharedMemoryHandle& handle);
+
+  // IsHandleValid applied to this object's handle.
+  bool IsValid() const { return static_cast<bool>(mapped_file_); }
+
+  // Return invalid handle (see comment above for exact definition).
+  static SharedMemoryHandle NULLHandle();
+
+  // Creates a shared memory segment.
+  // Returns true on success, false on failure.
+  bool Create(size_t size) { return CreateInternal(size, false); }
+
+  // Creates a shared memory segment that supports the Freeze()
+  // method; see below.  (Warning: creating freezeable shared memory
+  // within a sandboxed process isn't possible on some platforms.)
+  // Returns true on success, false on failure.
+  bool CreateFreezeable(size_t size) { return CreateInternal(size, true); }
+
+  // Maps the shared memory into the caller's address space.
+  // Returns true on success, false otherwise.  The memory address
+  // is accessed via the memory() accessor.
+  //
+  // If the specified fixed address is not null, it is the address that the
+  // shared memory must be mapped at.  Returns false if the shared memory
+  // could not be mapped at that address.
+  bool Map(size_t bytes, void* fixed_address = nullptr);
+
+  // Unmaps the shared memory from the caller's address space.
+  void Unmap() { memory_ = nullptr; }
+
+  // Get the size of the opened shared memory backing file.
+  // Note:  This size is only available to the creator of the
+  // shared memory, and not to those that opened shared memory
+  // created externally.
+  // Returns 0 if not opened or unknown.
+  size_t max_size() const { return max_size_; }
+
+  // Gets a pointer to the opened memory space if it has been
+  // Mapped via Map().  Returns NULL if it is not mapped.
+  void* memory() const { return memory_.get(); }
+
+  // Extracts the underlying file handle, returning a RAII type.
+  // This unmaps the memory as a side-effect (and cleans up any OS-specific
+  // resources).
+  mozilla::UniqueFileHandle TakeHandle() {
+    mozilla::UniqueFileHandle handle = std::move(mapped_file_);
+    Close();
+    return handle;
+  }
+
+  // Creates a copy of the underlying file handle, returning a RAII type.
+  // This operation may fail, in which case the returned file handle will be
+  // invalid.
+  mozilla::UniqueFileHandle CloneHandle();
+
+  // Make the shared memory object read-only, such that it cannot be
+  // written even if it's sent to an untrusted process.  If it was
+  // mapped in this process, it will be unmapped.  The object must
+  // have been created with CreateFreezeable(), and must not have
+  // already been shared to another process.
+  //
+  // (See bug 1479960 comment #0 for OS-specific implementation
+  // details.)
+  [[nodiscard]] bool Freeze() {
+    Unmap();
+    return ReadOnlyCopy(this);
+  }
+
+  // Similar to Freeze(), but assigns the read-only capability to
+  // another SharedMemory object and leaves this object's mapping in
+  // place and writeable.  This can be used to broadcast data to
+  // several untrusted readers without copying.
+  //
+  // The other constraints of Freeze() still apply: this object closes
+  // its handle (as if by `Close(false)`), it cannot have been
+  // previously shared, and the read-only handle cannot be used to
+  // write the memory even by a malicious process.
+  //
+  // (The out parameter can currently be the same as `this` if and
+  // only if the memory was unmapped, but this is an implementation
+  // detail and shouldn't be relied on; for that use case Freeze()
+  // should be used instead.)
+  [[nodiscard]] bool ReadOnlyCopy(SharedMemory* ro_out);
+
+  // Closes the open shared memory segment.
+  // It is safe to call Close repeatedly.
+  void Close(bool unmap_view = true);
+
+  // Returns a page-aligned address at which the given number of bytes could
+  // probably be mapped.  Returns NULL on error or if there is insufficient
+  // contiguous address space to map the required number of pages.
+  //
+  // Note that there is no guarantee that the given address space will actually
+  // be free by the time this function returns, since another thread might map
+  // something there in the meantime.
+  static void* FindFreeAddressSpace(size_t size);
+
+#ifdef OS_POSIX
+  // If named POSIX shm is being used, append the prefix (including
+  // the leading '/') that would be used by a process with the given
+  // pid to the given string and return true.  If not, return false.
+  // (This is public so that the Linux sandboxing code can use it.)
+  static bool AppendPosixShmPrefix(std::string* str, pid_t pid);
+  // Similar, but simply returns whether POSIX shm is in use.
+  static bool UsingPosixShm();
+#endif
+
+ private:
+  bool CreateInternal(size_t size, bool freezeable);
+
+  // Unmapping shared memory requires the mapped size on Unix but not
+  // Windows; this encapsulates that difference.
+  struct MappingDeleter {
+#ifdef OS_POSIX
+    // A default-constructed deleter must be used only with nullptr
+    // (to allow default-constructing UniqueMapping).  A deleter with
+    // a size must be used at most once.
+    size_t mapped_size_ = 0;
+    explicit MappingDeleter(size_t size) : mapped_size_(size) {}
+#endif
+    MappingDeleter() = default;
+    void operator()(void* ptr);
+  };
+  using UniqueMapping = mozilla::UniquePtr<void, MappingDeleter>;
+
+  UniqueMapping memory_;
+  size_t max_size_ = 0;
+  mozilla::UniqueFileHandle mapped_file_;
+#if defined(OS_WIN)
+  // If true indicates this came from an external source so needs extra checks
+  // before being mapped.
+  bool external_section_ = false;
+#elif defined(OS_POSIX) && !defined(ANDROID)
+  mozilla::UniqueFileHandle frozen_file_;
+  bool is_memfd_ = false;
+#endif
+  bool read_only_ = false;
+  bool freezeable_ = false;
+
+  DISALLOW_EVIL_CONSTRUCTORS(SharedMemory);
+};
+
+}  // namespace base
+
+#endif  // BASE_SHARED_MEMORY_H_
diff --git a/ipc/chromium/src/base/shared_memory_posix.cc b/ipc/chromium/src/base/shared_memory_posix.cc
new file mode 100644
index 0000000000..d795db6f1c
--- /dev/null
+++ b/ipc/chromium/src/base/shared_memory_posix.cc
@@ -0,0 +1,560 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/shared_memory.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#ifdef ANDROID
+#  include "mozilla/Ashmem.h"
+#endif
+
+#ifdef OS_LINUX
+#  include "linux_memfd_defs.h"
+#endif
+#ifdef MOZ_WIDGET_GTK
+#  include "mozilla/WidgetUtilsGtk.h"
+#endif
+
+#ifdef __FreeBSD__
+#  include <sys/capsicum.h>
+#endif
+
+#ifdef MOZ_VALGRIND
+#  include <valgrind/valgrind.h>
+#endif
+
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+#include "base/string_util.h"
+#include "mozilla/Atomics.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/ProfilerThreadSleep.h"
+#include "mozilla/UniquePtrExtensions.h"
+#include "prenv.h"
+
+namespace base {
+
+void SharedMemory::MappingDeleter::operator()(void* ptr) {
+  // Check that this isn't a default-constructed deleter.  (`munmap`
+  // is specified to fail with `EINVAL` if the length is 0, so this
+  // assertion isn't load-bearing.)
+  DCHECK(mapped_size_ != 0);
+  munmap(ptr, mapped_size_);
+  // Guard against multiple calls of the same deleter, which shouldn't
+  // happen (but could, if `UniquePtr::reset` were used).  Calling
+  // `munmap` with an incorrect non-zero length would be bad.
+  mapped_size_ = 0;
+}
+
+SharedMemory::~SharedMemory() {
+  // This is almost equal to the default destructor, except for the
+  // warning message about unfrozen freezable memory.
+  Close();
+}
+
+bool SharedMemory::SetHandle(SharedMemoryHandle handle, bool read_only) {
+  DCHECK(!mapped_file_);
+#ifndef ANDROID
+  DCHECK(!frozen_file_);
+#endif
+
+  freezeable_ = false;
+  mapped_file_ = std::move(handle);
+  read_only_ = read_only;
+  // is_memfd_ only matters for freezing, which isn't possible
+  return true;
+}
+
+// static
+bool SharedMemory::IsHandleValid(const SharedMemoryHandle& handle) {
+  return handle != nullptr;
+}
+
+// static
+SharedMemoryHandle SharedMemory::NULLHandle() { return nullptr; }
+
+// static
+bool SharedMemory::UsingPosixShm() {
+  // Undocumented feature of AppendPosixShmPrefix to reduce code
+  // duplication: if the string pointer is null, it's ignored.
+  return AppendPosixShmPrefix(nullptr, 0);
+}
+
+#ifdef ANDROID
+
+// Android has its own shared memory API, ashmem.  It doesn't support
+// POSIX shm_open, and the memfd support (see below) also doesn't work
+// because its SELinux policy prevents the procfs operations we'd use
+// (see bug 1670277 for more details).
+
+// static
+bool SharedMemory::AppendPosixShmPrefix(std::string* str, pid_t pid) {
+  return false;
+}
+
+bool SharedMemory::CreateInternal(size_t size, bool freezeable) {
+  read_only_ = false;
+
+  DCHECK(size > 0);
+  DCHECK(!mapped_file_);
+
+  int fd = mozilla::android::ashmem_create(nullptr, size);
+  if (fd < 0) {
+    CHROMIUM_LOG(WARNING) << "failed to open shm: " << strerror(errno);
+    return false;
+  }
+
+  mapped_file_.reset(fd);
+  max_size_ = size;
+  freezeable_ = freezeable;
+  return true;
+}
+
+bool SharedMemory::ReadOnlyCopy(SharedMemory* ro_out) {
+  DCHECK(mapped_file_);
+  DCHECK(!read_only_);
+  CHECK(freezeable_);
+
+  if (ro_out == this) {
+    DCHECK(!memory_);
+  }
+
+  if (mozilla::android::ashmem_setProt(mapped_file_.get(), PROT_READ) != 0) {
+    CHROMIUM_LOG(WARNING) << "failed to set ashmem read-only: "
+                          << strerror(errno);
+    return false;
+  }
+
+  mozilla::UniqueFileHandle ro_file = std::move(mapped_file_);
+
+  freezeable_ = false;
+  ro_out->Close();
+  ro_out->mapped_file_ = std::move(ro_file);
+  ro_out->max_size_ = max_size_;
+  ro_out->read_only_ = true;
+  ro_out->freezeable_ = false;
+
+  return true;
+}
+
+#else  // not Android
+
+// memfd_create is a nonstandard interface for creating anonymous
+// shared memory accessible as a file descriptor but not tied to any
+// filesystem.  It first appeared in Linux 3.17, and was adopted by
+// FreeBSD in version 13.
+
+#  if !defined(HAVE_MEMFD_CREATE) && defined(OS_LINUX) && \
+      defined(SYS_memfd_create)
+
+// Older libc versions (e.g., glibc before 2.27) don't have the
+// wrapper, but we can supply our own; see `linux_memfd_defs.h`.
+
+static int memfd_create(const char* name, unsigned int flags) {
+  return syscall(SYS_memfd_create, name, flags);
+}
+
+#    define HAVE_MEMFD_CREATE 1
+#  endif
+
+// memfd supports having "seals" applied to the file, to prevent
+// various types of changes (which apply to all fds referencing the
+// file).  Unfortunately, we can't rely on F_SEAL_WRITE to implement
+// Freeze(); see the comments in ReadOnlyCopy() below.
+//
+// Instead, to prevent a child process from regaining write access to
+// a read-only copy, the OS must also provide a way to remove write
+// permissions at the file descriptor level.  This next section
+// attempts to accomplish that.
+
+#  ifdef HAVE_MEMFD_CREATE
+#    ifdef XP_LINUX
+#      define USE_MEMFD_CREATE 1
+
+// To create a read-only duplicate of an fd, we can use procfs; the
+// same operation could restore write access, but sandboxing prevents
+// child processes from accessing /proc.
+//
+// (Note: if this ever changes to not use /proc, also reconsider how
+// and if HaveMemfd should check whether this works.)
+
+static int DupReadOnly(int fd) {
+  std::string path = StringPrintf("/proc/self/fd/%d", fd);
+  // procfs opens probably won't EINTR, but checking for it can't hurt
+  return HANDLE_EINTR(open(path.c_str(), O_RDONLY | O_CLOEXEC));
+}
+
+#    elif defined(__FreeBSD__)
+#      define USE_MEMFD_CREATE 1
+
+// FreeBSD's Capsicum framework allows irrevocably restricting the
+// operations permitted on a file descriptor.
+
+static int DupReadOnly(int fd) {
+  int rofd = dup(fd);
+  if (rofd < 0) {
+    return -1;
+  }
+
+  cap_rights_t rights;
+  cap_rights_init(&rights, CAP_FSTAT, CAP_MMAP_R);
+  if (cap_rights_limit(rofd, &rights) < 0) {
+    int err = errno;
+    close(rofd);
+    errno = err;
+    return -1;
+  }
+
+  return rofd;
+}
+
+#    else  // unhandled OS
+#      warning "OS has memfd_create but no DupReadOnly implementation"
+#    endif  // OS selection
+#  endif    // HAVE_MEMFD_CREATE
+
+// Runtime detection for memfd support.
+static bool HaveMemfd() {
+#  ifdef USE_MEMFD_CREATE
+  static const bool kHave = [] {
+    mozilla::UniqueFileHandle fd(
+        memfd_create("mozilla-ipc-test", MFD_CLOEXEC | MFD_ALLOW_SEALING));
+    if (!fd) {
+      DCHECK_EQ(errno, ENOSYS);
+      return false;
+    }
+
+    // Verify that DupReadOnly works; on Linux it's known to fail if:
+    //
+    // * SELinux assigns the memfd a type for which this process's
+    //   domain doesn't have "open" permission; this is always the
+    //   case on Android but could occur on desktop as well
+    //
+    // * /proc (used by the DupReadOnly implementation) isn't mounted,
+    //   which is a configuration that the Tor Browser project is
+    //   interested in as a way to reduce fingerprinting risk
+    //
+    // Sandboxed processes on Linux also can't use it if sandboxing
+    // has already been started, but that's expected.  It should be
+    // safe for sandboxed child processes to use memfd even if an
+    // unsandboxed process couldn't freeze them, because freezing
+    // isn't allowed (or meaningful) for memory created by another
+    // process.
+
+    if (!PR_GetEnv("MOZ_SANDBOXED")) {
+      mozilla::UniqueFileHandle rofd(DupReadOnly(fd.get()));
+      if (!rofd) {
+        CHROMIUM_LOG(WARNING) << "read-only dup failed (" << strerror(errno)
+                              << "); not using memfd";
+        return false;
+      }
+    }
+    return true;
+  }();
+  return kHave;
+#  else
+  return false;
+#  endif  // USE_MEMFD_CREATE
+}
+
+// static
+bool SharedMemory::AppendPosixShmPrefix(std::string* str, pid_t pid) {
+  if (HaveMemfd()) {
+    return false;
+  }
+  // See also UsingPosixShm().
+  if (!str) {
+    return true;
+  }
+  *str += '/';
+#  ifdef MOZ_WIDGET_GTK
+  // The Snap package environment doesn't provide a private /dev/shm
+  // (it's used for communication with services like PulseAudio);
+  // instead AppArmor is used to restrict access to it.  Anything with
+  // this prefix is allowed:
+  if (const char* snap = mozilla::widget::GetSnapInstanceName()) {
+    StringAppendF(str, "snap.%s.", snap);
+  }
+#  endif  // OS_LINUX
+  // Hopefully the "implementation defined" name length limit is long
+  // enough for this.
+  StringAppendF(str, "org.mozilla.ipc.%d.", static_cast<int>(pid));
+  return true;
+}
+
+bool SharedMemory::CreateInternal(size_t size, bool freezeable) {
+  read_only_ = false;
+
+  DCHECK(size > 0);
+  DCHECK(!mapped_file_);
+  DCHECK(!frozen_file_);
+
+  mozilla::UniqueFileHandle fd;
+  mozilla::UniqueFileHandle frozen_fd;
+  bool is_memfd = false;
+
+#  ifdef USE_MEMFD_CREATE
+  if (HaveMemfd()) {
+    const unsigned flags = MFD_CLOEXEC | (freezeable ? MFD_ALLOW_SEALING : 0);
+    fd.reset(memfd_create("mozilla-ipc", flags));
+    if (!fd) {
+      // In general it's too late to fall back here -- in a sandboxed
+      // child process, shm_open is already blocked.  And it shouldn't
+      // be necessary.
+      CHROMIUM_LOG(WARNING) << "failed to create memfd: " << strerror(errno);
+      return false;
+    }
+    is_memfd = true;
+    if (freezeable) {
+      frozen_fd.reset(DupReadOnly(fd.get()));
+      if (!frozen_fd) {
+        CHROMIUM_LOG(WARNING)
+            << "failed to create read-only memfd: " << strerror(errno);
+        return false;
+      }
+    }
+  }
+#  endif
+
+  if (!fd) {
+    // Generic Unix: shm_open + shm_unlink
+    do {
+      // The names don't need to be unique, but it saves time if they
+      // usually are.
+      static mozilla::Atomic<size_t> sNameCounter;
+      std::string name;
+      CHECK(AppendPosixShmPrefix(&name, getpid()));
+      StringAppendF(&name, "%zu", sNameCounter++);
+      // O_EXCL means the names being predictable shouldn't be a problem.
+      fd.reset(HANDLE_EINTR(
+          shm_open(name.c_str(), O_RDWR | O_CREAT | O_EXCL, 0600)));
+      if (fd) {
+        if (freezeable) {
+          frozen_fd.reset(HANDLE_EINTR(shm_open(name.c_str(), O_RDONLY, 0400)));
+          if (!frozen_fd) {
+            int open_err = errno;
+            shm_unlink(name.c_str());
+            DLOG(FATAL) << "failed to re-open freezeable shm: "
+                        << strerror(open_err);
+            return false;
+          }
+        }
+        if (shm_unlink(name.c_str()) != 0) {
+          // This shouldn't happen, but if it does: assume the file is
+          // in fact leaked, and bail out now while it's still 0-length.
+          DLOG(FATAL) << "failed to unlink shm: " << strerror(errno);
+          return false;
+        }
+      }
+    } while (!fd && errno == EEXIST);
+  }
+
+  if (!fd) {
+    CHROMIUM_LOG(WARNING) << "failed to open shm: " << strerror(errno);
+    return false;
+  }
+
+  mozilla::Maybe<int> fallocateError;
+#  if defined(HAVE_POSIX_FALLOCATE)
+  // Using posix_fallocate will ensure that there's actually space for this
+  // file. Otherwise we end up with a sparse file that can give SIGBUS if we
+  // run out of space while writing to it.  (This doesn't apply to memfd.)
+  if (!is_memfd) {
+    int rv;
+    // Avoid repeated interruptions of posix_fallocate by the profiler's
+    // SIGPROF sampling signal. Indicating "thread sleep" here means we'll
+    // get up to one interruption but not more. See bug 1658847 for more.
+    // This has to be scoped outside the HANDLE_RV_EINTR retry loop.
+    {
+      AUTO_PROFILER_THREAD_SLEEP;
+
+      rv = HANDLE_RV_EINTR(
+          posix_fallocate(fd.get(), 0, static_cast<off_t>(size)));
+    }
+
+    // Some filesystems have trouble with posix_fallocate. For now, we must
+    // fallback ftruncate and accept the allocation failures like we do
+    // without posix_fallocate.
+    // See https://bugzilla.mozilla.org/show_bug.cgi?id=1618914
+    if (rv != 0 && rv != EOPNOTSUPP && rv != EINVAL && rv != ENODEV) {
+      CHROMIUM_LOG(WARNING)
+          << "fallocate failed to set shm size: " << strerror(rv);
+      return false;
+    }
+    fallocateError = mozilla::Some(rv);
+  }
+#  endif
+
+  // If posix_fallocate isn't supported / relevant for this type of
+  // file (either failed with an expected error, or wasn't attempted),
+  // then set the size with ftruncate:
+  if (fallocateError != mozilla::Some(0)) {
+    int rv = HANDLE_EINTR(ftruncate(fd.get(), static_cast<off_t>(size)));
+    if (rv != 0) {
+      int ftruncate_errno = errno;
+      if (fallocateError) {
+        CHROMIUM_LOG(WARNING) << "fallocate failed to set shm size: "
+                              << strerror(*fallocateError);
+      }
+      CHROMIUM_LOG(WARNING)
+          << "ftruncate failed to set shm size: " << strerror(ftruncate_errno);
+      return false;
+    }
+  }
+
+  mapped_file_ = std::move(fd);
+  frozen_file_ = std::move(frozen_fd);
+  max_size_ = size;
+  freezeable_ = freezeable;
+  is_memfd_ = is_memfd;
+  return true;
+}
+
+bool SharedMemory::ReadOnlyCopy(SharedMemory* ro_out) {
+  DCHECK(mapped_file_);
+  DCHECK(!read_only_);
+  CHECK(freezeable_);
+
+  if (ro_out == this) {
+    DCHECK(!memory_);
+  }
+
+#  ifdef USE_MEMFD_CREATE
+#    ifdef MOZ_VALGRIND
+  // Valgrind allows memfd_create but doesn't understand F_ADD_SEALS.
+  static const bool haveSeals = RUNNING_ON_VALGRIND == 0;
+#    else
+  static const bool haveSeals = true;
+#    endif
+  static const bool useSeals = !PR_GetEnv("MOZ_SHM_NO_SEALS");
+  if (is_memfd_ && haveSeals && useSeals) {
+    // Seals are added to the file as defense-in-depth.  The primary
+    // method of access control is creating a read-only fd (using
+    // procfs in this case) and requiring that sandboxes processes not
+    // have access to /proc/self/fd to regain write permission; this
+    // is the same as with shm_open.
+    //
+    // Unfortunately, F_SEAL_WRITE is unreliable: if the process
+    // forked while there was a writeable mapping, it will inherit a
+    // copy of the mapping, which causes the seal to fail.
+    //
+    // (Also, in the future we may want to split this into separate
+    // classes for mappings and shared memory handles, which would
+    // complicate identifying the case where `F_SEAL_WRITE` would be
+    // possible even in the absence of races with fork.)
+    //
+    // However, Linux 5.1 added F_SEAL_FUTURE_WRITE, which prevents
+    // write operations afterwards, but existing writeable mappings
+    // are unaffected (similar to ashmem protection semantics).
+
+    const int seals = F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL;
+    int sealError = EINVAL;
+
+#    ifdef F_SEAL_FUTURE_WRITE
+    sealError =
+        fcntl(mapped_file_.get(), F_ADD_SEALS, seals | F_SEAL_FUTURE_WRITE) == 0
+            ? 0
+            : errno;
+#    endif  // F_SEAL_FUTURE_WRITE
+    if (sealError == EINVAL) {
+      sealError =
+          fcntl(mapped_file_.get(), F_ADD_SEALS, seals) == 0 ? 0 : errno;
+    }
+    if (sealError != 0) {
+      CHROMIUM_LOG(WARNING) << "failed to seal memfd: " << strerror(errno);
+      return false;
+    }
+  }
+#  else     // !USE_MEMFD_CREATE
+  DCHECK(!is_memfd_);
+#  endif
+
+  DCHECK(frozen_file_);
+  DCHECK(mapped_file_);
+  mapped_file_ = nullptr;
+  mozilla::UniqueFileHandle ro_file = std::move(frozen_file_);
+
+  DCHECK(ro_file);
+  freezeable_ = false;
+  ro_out->Close();
+  ro_out->mapped_file_ = std::move(ro_file);
+  ro_out->max_size_ = max_size_;
+  ro_out->read_only_ = true;
+  ro_out->freezeable_ = false;
+
+  return true;
+}
+
+#endif  // not Android
+
+#ifndef MAP_NORESERVE
+#  define MAP_NORESERVE 0
+#endif
+
+bool SharedMemory::Map(size_t bytes, void* fixed_address) {
+  if (!mapped_file_) {
+    return false;
+  }
+  DCHECK(!memory_);
+
+  // Don't use MAP_FIXED when a fixed_address was specified, since that can
+  // replace pages that are alread mapped at that address.
+  void* mem =
+      mmap(fixed_address, bytes, PROT_READ | (read_only_ ? 0 : PROT_WRITE),
+           MAP_SHARED, mapped_file_.get(), 0);
+
+  if (mem == MAP_FAILED) {
+    CHROMIUM_LOG(WARNING) << "Call to mmap failed: " << strerror(errno);
+    return false;
+  }
+
+  if (fixed_address && mem != fixed_address) {
+    bool munmap_succeeded = munmap(mem, bytes) == 0;
+    DCHECK(munmap_succeeded) << "Call to munmap failed, errno=" << errno;
+    return false;
+  }
+
+  memory_ = UniqueMapping(mem, MappingDeleter(bytes));
+  return true;
+}
+
+void* SharedMemory::FindFreeAddressSpace(size_t size) {
+  void* memory = mmap(nullptr, size, PROT_NONE,
+                      MAP_ANONYMOUS | MAP_NORESERVE | MAP_PRIVATE, -1, 0);
+  munmap(memory, size);
+  return memory != MAP_FAILED ? memory : NULL;
+}
+
+SharedMemoryHandle SharedMemory::CloneHandle() {
+  freezeable_ = false;
+  const int new_fd = dup(mapped_file_.get());
+  if (new_fd < 0) {
+    CHROMIUM_LOG(WARNING) << "failed to duplicate file descriptor: "
+                          << strerror(errno);
+    return nullptr;
+  }
+  return mozilla::UniqueFileHandle(new_fd);
+}
+void SharedMemory::Close(bool unmap_view) {
+  if (unmap_view) {
+    Unmap();
+  }
+
+  mapped_file_ = nullptr;
+#ifndef ANDROID
+  if (frozen_file_) {
+    CHROMIUM_LOG(WARNING) << "freezeable shared memory was never frozen";
+    frozen_file_ = nullptr;
+  }
+#endif
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/shared_memory_win.cc b/ipc/chromium/src/base/shared_memory_win.cc
new file mode 100644
index 0000000000..a22a68c7e2
--- /dev/null
+++ b/ipc/chromium/src/base/shared_memory_win.cc
@@ -0,0 +1,282 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/shared_memory.h"
+
+#include "base/logging.h"
+#include "base/win_util.h"
+#include "base/string_util.h"
+#include "mozilla/ipc/ProtocolUtils.h"
+#include "mozilla/RandomNum.h"
+#include "mozilla/WindowsVersion.h"
+#include "nsDebug.h"
+#include "nsString.h"
+#ifdef MOZ_MEMORY
+#  include "mozmemory_utils.h"
+#endif
+
+namespace {
+// NtQuerySection is an internal (but believed to be stable) API and the
+// structures it uses are defined in nt_internals.h.
+// So we have to define them ourselves.
+typedef enum _SECTION_INFORMATION_CLASS {
+  SectionBasicInformation,
+} SECTION_INFORMATION_CLASS;
+
+typedef struct _SECTION_BASIC_INFORMATION {
+  PVOID BaseAddress;
+  ULONG Attributes;
+  LARGE_INTEGER Size;
+} SECTION_BASIC_INFORMATION, *PSECTION_BASIC_INFORMATION;
+
+typedef ULONG(__stdcall* NtQuerySectionType)(
+    HANDLE SectionHandle, SECTION_INFORMATION_CLASS SectionInformationClass,
+    PVOID SectionInformation, ULONG SectionInformationLength,
+    PULONG ResultLength);
+
+// Checks if the section object is safe to map. At the moment this just means
+// it's not an image section.
+bool IsSectionSafeToMap(HANDLE handle) {
+  static NtQuerySectionType nt_query_section_func =
+      reinterpret_cast<NtQuerySectionType>(
+          ::GetProcAddress(::GetModuleHandle(L"ntdll.dll"), "NtQuerySection"));
+  DCHECK(nt_query_section_func);
+
+  // The handle must have SECTION_QUERY access for this to succeed.
+  SECTION_BASIC_INFORMATION basic_information = {};
+  ULONG status =
+      nt_query_section_func(handle, SectionBasicInformation, &basic_information,
+                            sizeof(basic_information), nullptr);
+  if (status) {
+    return false;
+  }
+
+  return (basic_information.Attributes & SEC_IMAGE) != SEC_IMAGE;
+}
+
+}  // namespace
+
+namespace base {
+
+void SharedMemory::MappingDeleter::operator()(void* ptr) {
+  UnmapViewOfFile(ptr);
+}
+
+SharedMemory::~SharedMemory() = default;
+
+bool SharedMemory::SetHandle(SharedMemoryHandle handle, bool read_only) {
+  DCHECK(!mapped_file_);
+
+  external_section_ = true;
+  freezeable_ = false;  // just in case
+  mapped_file_ = std::move(handle);
+  read_only_ = read_only;
+  return true;
+}
+
+// static
+bool SharedMemory::IsHandleValid(const SharedMemoryHandle& handle) {
+  return handle != nullptr;
+}
+
+// static
+SharedMemoryHandle SharedMemory::NULLHandle() { return nullptr; }
+
+// Wrapper around CreateFileMappingW for pagefile-backed regions. When out of
+// memory, may attempt to stall and retry rather than returning immediately, in
+// hopes that the page file is about to be expanded by Windows. (bug 1822383,
+// bug 1716727)
+//
+// This method is largely a copy of the MozVirtualAlloc method from
+// mozjemalloc.cpp, which implements this strategy for VirtualAlloc calls,
+// except re-purposed to handle CreateFileMapping.
+static HANDLE MozCreateFileMappingW(
+    LPSECURITY_ATTRIBUTES lpFileMappingAttributes, DWORD flProtect,
+    DWORD dwMaximumSizeHigh, DWORD dwMaximumSizeLow, LPCWSTR lpName) {
+#ifdef MOZ_MEMORY
+  constexpr auto IsOOMError = [] {
+    return ::GetLastError() == ERROR_COMMITMENT_LIMIT;
+  };
+
+  {
+    HANDLE handle = ::CreateFileMappingW(
+        INVALID_HANDLE_VALUE, lpFileMappingAttributes, flProtect,
+        dwMaximumSizeHigh, dwMaximumSizeLow, lpName);
+    if (MOZ_LIKELY(handle)) {
+      MOZ_DIAGNOSTIC_ASSERT(handle != INVALID_HANDLE_VALUE,
+                            "::CreateFileMapping should return NULL, not "
+                            "INVALID_HANDLE_VALUE, on failure");
+      return handle;
+    }
+
+    // We can't do anything for errors other than OOM.
+    if (!IsOOMError()) {
+      return nullptr;
+    }
+  }
+
+  // Retry as many times as desired (possibly zero).
+  const mozilla::StallSpecs stallSpecs = mozilla::GetAllocatorStallSpecs();
+
+  const auto ret =
+      stallSpecs.StallAndRetry(&::Sleep, [&]() -> std::optional<HANDLE> {
+        HANDLE handle = ::CreateFileMappingW(
+            INVALID_HANDLE_VALUE, lpFileMappingAttributes, flProtect,
+            dwMaximumSizeHigh, dwMaximumSizeLow, lpName);
+
+        if (handle) {
+          MOZ_DIAGNOSTIC_ASSERT(handle != INVALID_HANDLE_VALUE,
+                                "::CreateFileMapping should return NULL, not "
+                                "INVALID_HANDLE_VALUE, on failure");
+          return handle;
+        }
+
+        // Failure for some reason other than OOM.
+        if (!IsOOMError()) {
+          return nullptr;
+        }
+
+        return std::nullopt;
+      });
+
+  return ret.value_or(nullptr);
+#else
+  return ::CreateFileMappingW(INVALID_HANDLE_VALUE, lpFileMappingAttributes,
+                              flProtect, dwMaximumSizeHigh, dwMaximumSizeLow,
+                              lpName);
+#endif
+}
+
+bool SharedMemory::CreateInternal(size_t size, bool freezeable) {
+  DCHECK(!mapped_file_);
+  read_only_ = false;
+
+  // If the shared memory object has no DACL, any process can
+  // duplicate its handles with any access rights; e.g., re-add write
+  // access to a read-only handle.  To prevent that, we give it an
+  // empty DACL, so that no process can do that.
+  SECURITY_ATTRIBUTES sa, *psa = nullptr;
+  SECURITY_DESCRIPTOR sd;
+  ACL dacl;
+  nsAutoStringN<sizeof("MozSharedMem_") + 16 * 4> name;
+
+  if (freezeable) {
+    psa = &sa;
+    sa.nLength = sizeof(sa);
+    sa.lpSecurityDescriptor = &sd;
+    sa.bInheritHandle = FALSE;
+
+    if (NS_WARN_IF(!InitializeAcl(&dacl, sizeof(dacl), ACL_REVISION)) ||
+        NS_WARN_IF(
+            !InitializeSecurityDescriptor(&sd, SECURITY_DESCRIPTOR_REVISION)) ||
+        NS_WARN_IF(!SetSecurityDescriptorDacl(&sd, TRUE, &dacl, FALSE))) {
+      return false;
+    }
+
+    // Older versions of Windows will silently ignore the security
+    // attributes unless the object has a name.
+    if (!mozilla::IsWin8Point1OrLater()) {
+      name.AssignLiteral("MozSharedMem_");
+      for (size_t i = 0; i < 4; ++i) {
+        mozilla::Maybe<uint64_t> randomNum = mozilla::RandomUint64();
+        if (NS_WARN_IF(randomNum.isNothing())) {
+          return false;
+        }
+        name.AppendPrintf("%016llx", *randomNum);
+      }
+    }
+  }
+
+  mapped_file_.reset(
+      MozCreateFileMappingW(psa, PAGE_READWRITE, 0, static_cast<DWORD>(size),
+                            name.IsEmpty() ? nullptr : name.get()));
+  if (!mapped_file_) return false;
+
+  max_size_ = size;
+  freezeable_ = freezeable;
+  return true;
+}
+
+bool SharedMemory::ReadOnlyCopy(SharedMemory* ro_out) {
+  DCHECK(!read_only_);
+  CHECK(freezeable_);
+
+  if (ro_out == this) {
+    DCHECK(!memory_);
+  }
+
+  HANDLE ro_handle;
+  if (!::DuplicateHandle(GetCurrentProcess(), mapped_file_.release(),
+                         GetCurrentProcess(), &ro_handle,
+                         GENERIC_READ | FILE_MAP_READ, false,
+                         DUPLICATE_CLOSE_SOURCE)) {
+    // DUPLICATE_CLOSE_SOURCE applies even if there is an error.
+    return false;
+  }
+
+  freezeable_ = false;
+
+  ro_out->Close();
+  ro_out->mapped_file_.reset(ro_handle);
+  ro_out->max_size_ = max_size_;
+  ro_out->read_only_ = true;
+  ro_out->freezeable_ = false;
+  ro_out->external_section_ = external_section_;
+
+  return true;
+}
+
+bool SharedMemory::Map(size_t bytes, void* fixed_address) {
+  if (!mapped_file_) {
+    return false;
+  }
+
+  if (external_section_ && !IsSectionSafeToMap(mapped_file_.get())) {
+    return false;
+  }
+
+  void* mem = MapViewOfFileEx(
+      mapped_file_.get(),
+      read_only_ ? FILE_MAP_READ : FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, bytes,
+      fixed_address);
+  if (mem) {
+    MOZ_ASSERT(!fixed_address || mem == fixed_address,
+               "MapViewOfFileEx returned an expected address");
+    memory_.reset(mem);
+    return true;
+  }
+  return false;
+}
+
+void* SharedMemory::FindFreeAddressSpace(size_t size) {
+  void* memory = VirtualAlloc(NULL, size, MEM_RESERVE, PAGE_NOACCESS);
+  if (memory) {
+    VirtualFree(memory, 0, MEM_RELEASE);
+  }
+  return memory;
+}
+
+SharedMemoryHandle SharedMemory::CloneHandle() {
+  freezeable_ = false;
+  HANDLE handle = INVALID_HANDLE_VALUE;
+  if (DuplicateHandle(GetCurrentProcess(), mapped_file_.get(),
+                      GetCurrentProcess(), &handle, 0, false,
+                      DUPLICATE_SAME_ACCESS)) {
+    return SharedMemoryHandle(handle);
+  }
+  NS_WARNING("DuplicateHandle Failed!");
+  return nullptr;
+}
+
+void SharedMemory::Close(bool unmap_view) {
+  if (unmap_view) {
+    Unmap();
+  }
+
+  mapped_file_ = nullptr;
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/stack_container.h b/ipc/chromium/src/base/stack_container.h
new file mode 100644
index 0000000000..d9add9904c
--- /dev/null
+++ b/ipc/chromium/src/base/stack_container.h
@@ -0,0 +1,244 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_STACK_CONTAINER_H_
+#define BASE_STACK_CONTAINER_H_
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+
+// This allocator can be used with STL containers to provide a stack buffer
+// from which to allocate memory and overflows onto the heap. This stack buffer
+// would be allocated on the stack and allows us to avoid heap operations in
+// some situations.
+//
+// STL likes to make copies of allocators, so the allocator itself can't hold
+// the data. Instead, we make the creator responsible for creating a
+// StackAllocator::Source which contains the data. Copying the allocator
+// merely copies the pointer to this shared source, so all allocators created
+// based on our allocator will share the same stack buffer.
+//
+// This stack buffer implementation is very simple. The first allocation that
+// fits in the stack buffer will use the stack buffer. Any subsequent
+// allocations will not use the stack buffer, even if there is unused room.
+// This makes it appropriate for array-like containers, but the caller should
+// be sure to reserve() in the container up to the stack buffer size. Otherwise
+// the container will allocate a small array which will "use up" the stack
+// buffer.
+template <typename T, size_t stack_capacity>
+class StackAllocator : public std::allocator<T> {
+ public:
+  typedef typename std::allocator<T>::pointer pointer;
+  typedef typename std::allocator<T>::size_type size_type;
+
+  // Backing store for the allocator. The container owner is responsible for
+  // maintaining this for as long as any containers using this allocator are
+  // live.
+  struct Source {
+    Source() : used_stack_buffer_(false) {}
+
+    // Casts the buffer in its right type.
+    T* stack_buffer() { return reinterpret_cast<T*>(stack_buffer_); }
+    const T* stack_buffer() const {
+      return reinterpret_cast<const T*>(stack_buffer_);
+    }
+
+    //
+    // IMPORTANT: Take care to ensure that stack_buffer_ is aligned
+    // since it is used to mimic an array of T.
+    // Be careful while declaring any unaligned types (like bool)
+    // before stack_buffer_.
+    //
+
+    // The buffer itself. It is not of type T because we don't want the
+    // constructors and destructors to be automatically called. Define a POD
+    // buffer of the right size instead.
+    char stack_buffer_[sizeof(T[stack_capacity])];
+
+    // Set when the stack buffer is used for an allocation. We do not track
+    // how much of the buffer is used, only that somebody is using it.
+    bool used_stack_buffer_;
+  };
+
+  // Used by containers when they want to refer to an allocator of type U.
+  template <typename U>
+  struct rebind {
+    typedef StackAllocator<U, stack_capacity> other;
+  };
+
+  // For the straight up copy c-tor, we can share storage.
+  StackAllocator(const StackAllocator<T, stack_capacity>& rhs)
+      : source_(rhs.source_) {}
+
+  // ISO C++ requires the following constructor to be defined,
+  // and std::vector in VC++2008SP1 Release fails with an error
+  // in the class _Container_base_aux_alloc_real (from <xutility>)
+  // if the constructor does not exist.
+  // For this constructor, we cannot share storage; there's
+  // no guarantee that the Source buffer of Ts is large enough
+  // for Us.
+  // TODO: If we were fancy pants, perhaps we could share storage
+  // iff sizeof(T) == sizeof(U).
+  template <typename U, size_t other_capacity>
+  explicit StackAllocator(const StackAllocator<U, other_capacity>& other)
+      : source_(NULL) {}
+
+  explicit StackAllocator(Source* source) : source_(source) {}
+
+  // Actually do the allocation. Use the stack buffer if nobody has used it yet
+  // and the size requested fits. Otherwise, fall through to the standard
+  // allocator.
+  pointer allocate(size_type n, void* hint = 0) {
+    if (source_ != NULL && !source_->used_stack_buffer_ &&
+        n <= stack_capacity) {
+      source_->used_stack_buffer_ = true;
+      return source_->stack_buffer();
+    } else {
+      return std::allocator<T>::allocate(n, hint);
+    }
+  }
+
+  // Free: when trying to free the stack buffer, just mark it as free. For
+  // non-stack-buffer pointers, just fall though to the standard allocator.
+  void deallocate(pointer p, size_type n) {
+    if (source_ != NULL && p == source_->stack_buffer())
+      source_->used_stack_buffer_ = false;
+    else
+      std::allocator<T>::deallocate(p, n);
+  }
+
+ private:
+  Source* source_;
+};
+
+// A wrapper around STL containers that maintains a stack-sized buffer that the
+// initial capacity of the vector is based on. Growing the container beyond the
+// stack capacity will transparently overflow onto the heap. The container must
+// support reserve().
+//
+// WATCH OUT: the ContainerType MUST use the proper StackAllocator for this
+// type. This object is really intended to be used only internally. You'll want
+// to use the wrappers below for different types.
+template <typename TContainerType, int stack_capacity>
+class StackContainer {
+ public:
+  typedef TContainerType ContainerType;
+  typedef typename ContainerType::value_type ContainedType;
+  typedef StackAllocator<ContainedType, stack_capacity> Allocator;
+
+  // Allocator must be constructed before the container!
+  StackContainer() : allocator_(&stack_data_), container_(allocator_) {
+    // Make the container use the stack allocation by reserving our buffer size
+    // before doing anything else.
+    container_.reserve(stack_capacity);
+  }
+
+  // Getters for the actual container.
+  //
+  // Danger: any copies of this made using the copy constructor must have
+  // shorter lifetimes than the source. The copy will share the same allocator
+  // and therefore the same stack buffer as the original. Use std::copy to
+  // copy into a "real" container for longer-lived objects.
+  ContainerType& container() { return container_; }
+  const ContainerType& container() const { return container_; }
+
+  // Support operator-> to get to the container. This allows nicer syntax like:
+  //   StackContainer<...> foo;
+  //   std::sort(foo->begin(), foo->end());
+  ContainerType* operator->() { return &container_; }
+  const ContainerType* operator->() const { return &container_; }
+
+#ifdef UNIT_TEST
+  // Retrieves the stack source so that that unit tests can verify that the
+  // buffer is being used properly.
+  const typename Allocator::Source& stack_data() const { return stack_data_; }
+#endif
+
+ protected:
+  typename Allocator::Source stack_data_;
+  Allocator allocator_;
+  ContainerType container_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(StackContainer);
+};
+
+// StackString
+template <size_t stack_capacity>
+class StackString
+    : public StackContainer<
+          std::basic_string<char, std::char_traits<char>,
+                            StackAllocator<char, stack_capacity> >,
+          stack_capacity> {
+ public:
+  StackString()
+      : StackContainer<std::basic_string<char, std::char_traits<char>,
+                                         StackAllocator<char, stack_capacity> >,
+                       stack_capacity>() {}
+
+ private:
+  DISALLOW_EVIL_CONSTRUCTORS(StackString);
+};
+
+// StackWString
+template <size_t stack_capacity>
+class StackWString
+    : public StackContainer<
+          std::basic_string<wchar_t, std::char_traits<wchar_t>,
+                            StackAllocator<wchar_t, stack_capacity> >,
+          stack_capacity> {
+ public:
+  StackWString()
+      : StackContainer<
+            std::basic_string<wchar_t, std::char_traits<wchar_t>,
+                              StackAllocator<wchar_t, stack_capacity> >,
+            stack_capacity>() {}
+
+ private:
+  DISALLOW_EVIL_CONSTRUCTORS(StackWString);
+};
+
+// StackVector
+//
+// Example:
+//   StackVector<int, 16> foo;
+//   foo->push_back(22);  // we have overloaded operator->
+//   foo[0] = 10;         // as well as operator[]
+template <typename T, size_t stack_capacity>
+class StackVector
+    : public StackContainer<std::vector<T, StackAllocator<T, stack_capacity> >,
+                            stack_capacity> {
+ public:
+  StackVector()
+      : StackContainer<std::vector<T, StackAllocator<T, stack_capacity> >,
+                       stack_capacity>() {}
+
+  // We need to put this in STL containers sometimes, which requires a copy
+  // constructor. We can't call the regular copy constructor because that will
+  // take the stack buffer from the original. Here, we create an empty object
+  // and make a stack buffer of its own.
+  StackVector(const StackVector<T, stack_capacity>& other)
+      : StackContainer<std::vector<T, StackAllocator<T, stack_capacity> >,
+                       stack_capacity>() {
+    this->container().assign(other->begin(), other->end());
+  }
+
+  StackVector<T, stack_capacity>& operator=(
+      const StackVector<T, stack_capacity>& other) {
+    this->container().assign(other->begin(), other->end());
+    return *this;
+  }
+
+  // Vectors are commonly indexed, which isn't very convenient even with
+  // operator-> (using "->at()" does exception stuff we don't want).
+  T& operator[](size_t i) { return this->container().operator[](i); }
+  const T& operator[](size_t i) const {
+    return this->container().operator[](i);
+  }
+};
+
+#endif  // BASE_STACK_CONTAINER_H_
diff --git a/ipc/chromium/src/base/stl_util-inl.h b/ipc/chromium/src/base/stl_util-inl.h
new file mode 100644
index 0000000000..034c16049c
--- /dev/null
+++ b/ipc/chromium/src/base/stl_util-inl.h
@@ -0,0 +1,435 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// STL utility functions.  Usually, these replace built-in, but slow(!),
+// STL functions with more efficient versions.
+
+#ifndef BASE_STL_UTIL_INL_H_
+#define BASE_STL_UTIL_INL_H_
+
+#include <string.h>  // for memcpy
+#include <functional>
+#include <set>
+#include <string>
+#include <vector>
+#include <cassert>
+
+// Clear internal memory of an STL object.
+// STL clear()/reserve(0) does not always free internal memory allocated
+// This function uses swap/destructor to ensure the internal memory is freed.
+template <class T>
+void STLClearObject(T* obj) {
+  T tmp;
+  tmp.swap(*obj);
+  obj->reserve(0);  // this is because sometimes "T tmp" allocates objects with
+                    // memory (arena implementation?).  use reserve()
+                    // to clear() even if it doesn't always work
+}
+
+// Reduce memory usage on behalf of object if it is using more than
+// "bytes" bytes of space.  By default, we clear objects over 1MB.
+template <class T>
+inline void STLClearIfBig(T* obj, size_t limit = 1 << 20) {
+  if (obj->capacity() >= limit) {
+    STLClearObject(obj);
+  } else {
+    obj->clear();
+  }
+}
+
+// Reserve space for STL object.
+// STL's reserve() will always copy.
+// This function avoid the copy if we already have capacity
+template <class T>
+void STLReserveIfNeeded(T* obj, int new_size) {
+  if (obj->capacity() < new_size)  // increase capacity
+    obj->reserve(new_size);
+  else if (obj->size() > new_size)  // reduce size
+    obj->resize(new_size);
+}
+
+// STLDeleteContainerPointers()
+//  For a range within a container of pointers, calls delete
+//  (non-array version) on these pointers.
+// NOTE: for these three functions, we could just implement a DeleteObject
+// functor and then call for_each() on the range and functor, but this
+// requires us to pull in all of algorithm.h, which seems expensive.
+// For hash_[multi]set, it is important that this deletes behind the iterator
+// because the hash_set may call the hash function on the iterator when it is
+// advanced, which could result in the hash function trying to deference a
+// stale pointer.
+template <class ForwardIterator>
+void STLDeleteContainerPointers(ForwardIterator begin, ForwardIterator end) {
+  while (begin != end) {
+    ForwardIterator temp = begin;
+    ++begin;
+    delete *temp;
+  }
+}
+
+// STLDeleteContainerPairPointers()
+//  For a range within a container of pairs, calls delete
+//  (non-array version) on BOTH items in the pairs.
+// NOTE: Like STLDeleteContainerPointers, it is important that this deletes
+// behind the iterator because if both the key and value are deleted, the
+// container may call the hash function on the iterator when it is advanced,
+// which could result in the hash function trying to dereference a stale
+// pointer.
+template <class ForwardIterator>
+void STLDeleteContainerPairPointers(ForwardIterator begin,
+                                    ForwardIterator end) {
+  while (begin != end) {
+    ForwardIterator temp = begin;
+    ++begin;
+    delete temp->first;
+    delete temp->second;
+  }
+}
+
+// STLDeleteContainerPairFirstPointers()
+//  For a range within a container of pairs, calls delete (non-array version)
+//  on the FIRST item in the pairs.
+// NOTE: Like STLDeleteContainerPointers, deleting behind the iterator.
+template <class ForwardIterator>
+void STLDeleteContainerPairFirstPointers(ForwardIterator begin,
+                                         ForwardIterator end) {
+  while (begin != end) {
+    ForwardIterator temp = begin;
+    ++begin;
+    delete temp->first;
+  }
+}
+
+// STLDeleteContainerPairSecondPointers()
+//  For a range within a container of pairs, calls delete
+//  (non-array version) on the SECOND item in the pairs.
+template <class ForwardIterator>
+void STLDeleteContainerPairSecondPointers(ForwardIterator begin,
+                                          ForwardIterator end) {
+  while (begin != end) {
+    delete begin->second;
+    ++begin;
+  }
+}
+
+template <typename T>
+inline void STLAssignToVector(std::vector<T>* vec, const T* ptr, size_t n) {
+  vec->resize(n);
+  memcpy(&vec->front(), ptr, n * sizeof(T));
+}
+
+/***** Hack to allow faster assignment to a vector *****/
+
+// This routine speeds up an assignment of 32 bytes to a vector from
+// about 250 cycles per assignment to about 140 cycles.
+//
+// Usage:
+//      STLAssignToVectorChar(&vec, ptr, size);
+//      STLAssignToString(&str, ptr, size);
+
+inline void STLAssignToVectorChar(std::vector<char>* vec, const char* ptr,
+                                  size_t n) {
+  STLAssignToVector(vec, ptr, n);
+}
+
+inline void STLAssignToString(std::string* str, const char* ptr, size_t n) {
+  str->resize(n);
+  memcpy(&*str->begin(), ptr, n);
+}
+
+// To treat a possibly-empty vector as an array, use these functions.
+// If you know the array will never be empty, you can use &*v.begin()
+// directly, but that is allowed to dump core if v is empty.  This
+// function is the most efficient code that will work, taking into
+// account how our STL is actually implemented.  THIS IS NON-PORTABLE
+// CODE, so call us instead of repeating the nonportable code
+// everywhere.  If our STL implementation changes, we will need to
+// change this as well.
+
+template <typename T>
+inline T* vector_as_array(std::vector<T>* v) {
+#ifdef NDEBUG
+  return &*v->begin();
+#else
+  return v->empty() ? NULL : &*v->begin();
+#endif
+}
+
+template <typename T>
+inline const T* vector_as_array(const std::vector<T>* v) {
+#ifdef NDEBUG
+  return &*v->begin();
+#else
+  return v->empty() ? NULL : &*v->begin();
+#endif
+}
+
+// Return a mutable char* pointing to a string's internal buffer,
+// which may not be null-terminated. Writing through this pointer will
+// modify the string.
+//
+// string_as_array(&str)[i] is valid for 0 <= i < str.size() until the
+// next call to a string method that invalidates iterators.
+//
+// As of 2006-04, there is no standard-blessed way of getting a
+// mutable reference to a string's internal buffer. However, issue 530
+// (http://www.open-std.org/JTC1/SC22/WG21/docs/lwg-active.html#530)
+// proposes this as the method. According to Matt Austern, this should
+// already work on all current implementations.
+inline char* string_as_array(std::string* str) {
+  // DO NOT USE const_cast<char*>(str->data())! See the unittest for why.
+  return str->empty() ? NULL : &*str->begin();
+}
+
+// These are methods that test two hash maps/sets for equality.  These exist
+// because the == operator in the STL can return false when the maps/sets
+// contain identical elements.  This is because it compares the internal hash
+// tables which may be different if the order of insertions and deletions
+// differed.
+
+template <class HashSet>
+inline bool HashSetEquality(const HashSet& set_a, const HashSet& set_b) {
+  if (set_a.size() != set_b.size()) return false;
+  for (typename HashSet::const_iterator i = set_a.begin(); i != set_a.end();
+       ++i) {
+    if (set_b.find(*i) == set_b.end()) return false;
+  }
+  return true;
+}
+
+template <class HashMap>
+inline bool HashMapEquality(const HashMap& map_a, const HashMap& map_b) {
+  if (map_a.size() != map_b.size()) return false;
+  for (typename HashMap::const_iterator i = map_a.begin(); i != map_a.end();
+       ++i) {
+    typename HashMap::const_iterator j = map_b.find(i->first);
+    if (j == map_b.end()) return false;
+    if (i->second != j->second) return false;
+  }
+  return true;
+}
+
+// The following functions are useful for cleaning up STL containers
+// whose elements point to allocated memory.
+
+// STLDeleteElements() deletes all the elements in an STL container and clears
+// the container.  This function is suitable for use with a vector, set,
+// hash_set, or any other STL container which defines sensible begin(), end(),
+// and clear() methods.
+//
+// If container is NULL, this function is a no-op.
+//
+// As an alternative to calling STLDeleteElements() directly, consider
+// STLElementDeleter (defined below), which ensures that your container's
+// elements are deleted when the STLElementDeleter goes out of scope.
+template <class T>
+void STLDeleteElements(T* container) {
+  if (!container) return;
+  STLDeleteContainerPointers(container->begin(), container->end());
+  container->clear();
+}
+
+// Given an STL container consisting of (key, value) pairs, STLDeleteValues
+// deletes all the "value" components and clears the container.  Does nothing
+// in the case it's given a NULL pointer.
+
+template <class T>
+void STLDeleteValues(T* v) {
+  if (!v) return;
+  for (typename T::iterator i = v->begin(); i != v->end(); ++i) {
+    delete i->second;
+  }
+  v->clear();
+}
+
+// The following classes provide a convenient way to delete all elements or
+// values from STL containers when they goes out of scope.  This greatly
+// simplifies code that creates temporary objects and has multiple return
+// statements.  Example:
+//
+// vector<MyProto *> tmp_proto;
+// STLElementDeleter<vector<MyProto *> > d(&tmp_proto);
+// if (...) return false;
+// ...
+// return success;
+
+// Given a pointer to an STL container this class will delete all the element
+// pointers when it goes out of scope.
+
+template <class STLContainer>
+class STLElementDeleter {
+ public:
+  explicit STLElementDeleter(STLContainer* ptr) : container_ptr_(ptr) {}
+  ~STLElementDeleter() { STLDeleteElements(container_ptr_); }
+
+ private:
+  STLContainer* container_ptr_;
+};
+
+// Given a pointer to an STL container this class will delete all the value
+// pointers when it goes out of scope.
+
+template <class STLContainer>
+class STLValueDeleter {
+ public:
+  explicit STLValueDeleter(STLContainer* ptr) : container_ptr_(ptr) {}
+  ~STLValueDeleter() { STLDeleteValues(container_ptr_); }
+
+ private:
+  STLContainer* container_ptr_;
+};
+
+// Forward declare some callback classes in callback.h for STLBinaryFunction
+template <class R, class T1, class T2>
+class ResultCallback2;
+
+// STLBinaryFunction is a wrapper for the ResultCallback2 class in callback.h
+// It provides an operator () method instead of a Run method, so it may be
+// passed to STL functions in <algorithm>.
+//
+// The client should create callback with NewPermanentCallback, and should
+// delete callback after it is done using the STLBinaryFunction.
+
+template <class Result, class Arg1, class Arg2>
+class STLBinaryFunction : public std::binary_function<Arg1, Arg2, Result> {
+ public:
+  typedef ResultCallback2<Result, Arg1, Arg2> Callback;
+
+  explicit STLBinaryFunction(Callback* callback) : callback_(callback) {
+    assert(callback_);
+  }
+
+  Result operator()(Arg1 arg1, Arg2 arg2) { return callback_->Run(arg1, arg2); }
+
+ private:
+  Callback* callback_;
+};
+
+// STLBinaryPredicate is a specialized version of STLBinaryFunction, where the
+// return type is bool and both arguments have type Arg.  It can be used
+// wherever STL requires a StrictWeakOrdering, such as in sort() or
+// lower_bound().
+//
+// templated typedefs are not supported, so instead we use inheritance.
+
+template <class Arg>
+class STLBinaryPredicate : public STLBinaryFunction<bool, Arg, Arg> {
+ public:
+  typedef typename STLBinaryPredicate<Arg>::Callback Callback;
+  explicit STLBinaryPredicate(Callback* callback)
+      : STLBinaryFunction<bool, Arg, Arg>(callback) {}
+};
+
+// Functors that compose arbitrary unary and binary functions with a
+// function that "projects" one of the members of a pair.
+// Specifically, if p1 and p2, respectively, are the functions that
+// map a pair to its first and second, respectively, members, the
+// table below summarizes the functions that can be constructed:
+//
+// * UnaryOperate1st<pair>(f) returns the function x -> f(p1(x))
+// * UnaryOperate2nd<pair>(f) returns the function x -> f(p2(x))
+// * BinaryOperate1st<pair>(f) returns the function (x,y) -> f(p1(x),p1(y))
+// * BinaryOperate2nd<pair>(f) returns the function (x,y) -> f(p2(x),p2(y))
+//
+// A typical usage for these functions would be when iterating over
+// the contents of an STL map. For other sample usage, see the unittest.
+
+template <typename Pair, typename UnaryOp>
+class UnaryOperateOnFirst
+    : public std::unary_function<Pair, typename UnaryOp::result_type> {
+ public:
+  UnaryOperateOnFirst() {}
+
+  explicit UnaryOperateOnFirst(const UnaryOp& f) : f_(f) {}
+
+  typename UnaryOp::result_type operator()(const Pair& p) const {
+    return f_(p.first);
+  }
+
+ private:
+  UnaryOp f_;
+};
+
+template <typename Pair, typename UnaryOp>
+UnaryOperateOnFirst<Pair, UnaryOp> UnaryOperate1st(const UnaryOp& f) {
+  return UnaryOperateOnFirst<Pair, UnaryOp>(f);
+}
+
+template <typename Pair, typename UnaryOp>
+class UnaryOperateOnSecond
+    : public std::unary_function<Pair, typename UnaryOp::result_type> {
+ public:
+  UnaryOperateOnSecond() {}
+
+  explicit UnaryOperateOnSecond(const UnaryOp& f) : f_(f) {}
+
+  typename UnaryOp::result_type operator()(const Pair& p) const {
+    return f_(p.second);
+  }
+
+ private:
+  UnaryOp f_;
+};
+
+template <typename Pair, typename UnaryOp>
+UnaryOperateOnSecond<Pair, UnaryOp> UnaryOperate2nd(const UnaryOp& f) {
+  return UnaryOperateOnSecond<Pair, UnaryOp>(f);
+}
+
+template <typename Pair, typename BinaryOp>
+class BinaryOperateOnFirst
+    : public std::binary_function<Pair, Pair, typename BinaryOp::result_type> {
+ public:
+  BinaryOperateOnFirst() {}
+
+  explicit BinaryOperateOnFirst(const BinaryOp& f) : f_(f) {}
+
+  typename BinaryOp::result_type operator()(const Pair& p1,
+                                            const Pair& p2) const {
+    return f_(p1.first, p2.first);
+  }
+
+ private:
+  BinaryOp f_;
+};
+
+template <typename Pair, typename BinaryOp>
+BinaryOperateOnFirst<Pair, BinaryOp> BinaryOperate1st(const BinaryOp& f) {
+  return BinaryOperateOnFirst<Pair, BinaryOp>(f);
+}
+
+template <typename Pair, typename BinaryOp>
+class BinaryOperateOnSecond
+    : public std::binary_function<Pair, Pair, typename BinaryOp::result_type> {
+ public:
+  BinaryOperateOnSecond() {}
+
+  explicit BinaryOperateOnSecond(const BinaryOp& f) : f_(f) {}
+
+  typename BinaryOp::result_type operator()(const Pair& p1,
+                                            const Pair& p2) const {
+    return f_(p1.second, p2.second);
+  }
+
+ private:
+  BinaryOp f_;
+};
+
+template <typename Pair, typename BinaryOp>
+BinaryOperateOnSecond<Pair, BinaryOp> BinaryOperate2nd(const BinaryOp& f) {
+  return BinaryOperateOnSecond<Pair, BinaryOp>(f);
+}
+
+// Translates a set into a vector.
+template <typename T>
+std::vector<T> SetToVector(const std::set<T>& values) {
+  std::vector<T> result;
+  result.reserve(values.size());
+  result.insert(result.begin(), values.begin(), values.end());
+  return result;
+}
+
+#endif  // BASE_STL_UTIL_INL_H_
diff --git a/ipc/chromium/src/base/string16.cc b/ipc/chromium/src/base/string16.cc
new file mode 100644
index 0000000000..e5d2a4a941
--- /dev/null
+++ b/ipc/chromium/src/base/string16.cc
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/string16.h"
+
+#if defined(WCHAR_T_IS_UTF16)
+
+#  error This file should not be used on 2-byte wchar_t systems
+// If this winds up being needed on 2-byte wchar_t systems, either the
+// definitions below can be used, or the host system's wide character
+// functions like wmemcmp can be wrapped.
+
+#elif defined(WCHAR_T_IS_UTF32)
+
+#  include "base/string_util.h"
+
+namespace base {
+
+int c16memcmp(const char16* s1, const char16* s2, size_t n) {
+  // We cannot call memcmp because that changes the semantics.
+  while (n-- > 0) {
+    if (*s1 != *s2) {
+      // We cannot use (*s1 - *s2) because char16 is unsigned.
+      return ((*s1 < *s2) ? -1 : 1);
+    }
+    ++s1;
+    ++s2;
+  }
+  return 0;
+}
+
+size_t c16len(const char16* s) {
+  const char16* s_orig = s;
+  while (*s) {
+    ++s;
+  }
+  return s - s_orig;
+}
+
+const char16* c16memchr(const char16* s, char16 c, size_t n) {
+  while (n-- > 0) {
+    if (*s == c) {
+      return s;
+    }
+    ++s;
+  }
+  return 0;
+}
+
+char16* c16memmove(char16* s1, const char16* s2, size_t n) {
+  return reinterpret_cast<char16*>(memmove(s1, s2, n * sizeof(char16)));
+}
+
+char16* c16memcpy(char16* s1, const char16* s2, size_t n) {
+  return reinterpret_cast<char16*>(memcpy(s1, s2, n * sizeof(char16)));
+}
+
+char16* c16memset(char16* s, char16 c, size_t n) {
+  char16* s_orig = s;
+  while (n-- > 0) {
+    *s = c;
+    ++s;
+  }
+  return s_orig;
+}
+
+}  // namespace base
+
+template class std::basic_string<char16, base::string16_char_traits>;
+
+#endif  // WCHAR_T_IS_UTF32
diff --git a/ipc/chromium/src/base/string16.h b/ipc/chromium/src/base/string16.h
new file mode 100644
index 0000000000..8c3bda91fd
--- /dev/null
+++ b/ipc/chromium/src/base/string16.h
@@ -0,0 +1,161 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_STRING16_H_
+#define BASE_STRING16_H_
+
+// WHAT:
+// A version of std::basic_string that provides 2-byte characters even when
+// wchar_t is not implemented as a 2-byte type. You can access this class as
+// string16. We also define char16, which string16 is based upon.
+//
+// WHY:
+// On Windows, wchar_t is 2 bytes, and it can conveniently handle UTF-16/UCS-2
+// data. Plenty of existing code operates on strings encoded as UTF-16.
+//
+// On many other platforms, sizeof(wchar_t) is 4 bytes by default. We can make
+// it 2 bytes by using the GCC flag -fshort-wchar. But then std::wstring fails
+// at run time, because it calls some functions (like wcslen) that come from
+// the system's native C library -- which was built with a 4-byte wchar_t!
+// It's wasteful to use 4-byte wchar_t strings to carry UTF-16 data, and it's
+// entirely improper on those systems where the encoding of wchar_t is defined
+// as UTF-32.
+//
+// Here, we define string16, which is similar to std::wstring but replaces all
+// libc functions with custom, 2-byte-char compatible routines. It is capable
+// of carrying UTF-16-encoded data.
+
+#include <stdio.h>
+#include <string>
+
+#include "base/basictypes.h"
+
+#if defined(WCHAR_T_IS_UTF16)
+
+typedef wchar_t char16;
+typedef std::wstring string16;
+
+#elif defined(WCHAR_T_IS_UTF32)
+
+typedef uint16_t char16;
+
+namespace base {
+
+// char16 versions of the functions required by string16_char_traits; these
+// are based on the wide character functions of similar names ("w" or "wcs"
+// instead of "c16").
+int c16memcmp(const char16* s1, const char16* s2, size_t n);
+size_t c16len(const char16* s);
+const char16* c16memchr(const char16* s, char16 c, size_t n);
+char16* c16memmove(char16* s1, const char16* s2, size_t n);
+char16* c16memcpy(char16* s1, const char16* s2, size_t n);
+char16* c16memset(char16* s, char16 c, size_t n);
+
+struct string16_char_traits {
+  typedef char16 char_type;
+  typedef int int_type;
+
+  // int_type needs to be able to hold each possible value of char_type, and in
+  // addition, the distinct value of eof().
+  COMPILE_ASSERT(sizeof(int_type) > sizeof(char_type), unexpected_type_width);
+
+  typedef std::streamoff off_type;
+  typedef mbstate_t state_type;
+  typedef std::fpos<state_type> pos_type;
+
+  static void assign(char_type& c1, const char_type& c2) { c1 = c2; }
+
+  static bool eq(const char_type& c1, const char_type& c2) { return c1 == c2; }
+  static bool lt(const char_type& c1, const char_type& c2) { return c1 < c2; }
+
+  static int compare(const char_type* s1, const char_type* s2, size_t n) {
+    return c16memcmp(s1, s2, n);
+  }
+
+  static size_t length(const char_type* s) { return c16len(s); }
+
+  static const char_type* find(const char_type* s, size_t n,
+                               const char_type& a) {
+    return c16memchr(s, a, n);
+  }
+
+  static char_type* move(char_type* s1, const char_type* s2, int_type n) {
+    return c16memmove(s1, s2, n);
+  }
+
+  static char_type* copy(char_type* s1, const char_type* s2, size_t n) {
+    return c16memcpy(s1, s2, n);
+  }
+
+  static char_type* assign(char_type* s, size_t n, char_type a) {
+    return c16memset(s, a, n);
+  }
+
+  static int_type not_eof(const int_type& c) {
+    return eq_int_type(c, eof()) ? 0 : c;
+  }
+
+  static char_type to_char_type(const int_type& c) { return char_type(c); }
+
+  static int_type to_int_type(const char_type& c) { return int_type(c); }
+
+  static bool eq_int_type(const int_type& c1, const int_type& c2) {
+    return c1 == c2;
+  }
+
+  static int_type eof() { return static_cast<int_type>(EOF); }
+};
+
+}  // namespace base
+
+// The string class will be explicitly instantiated only once, in string16.cc.
+//
+// std::basic_string<> in GNU libstdc++ contains a static data member,
+// _S_empty_rep_storage, to represent empty strings.  When an operation such
+// as assignment or destruction is performed on a string, causing its existing
+// data member to be invalidated, it must not be freed if this static data
+// member is being used.  Otherwise, it counts as an attempt to free static
+// (and not allocated) data, which is a memory error.
+//
+// Generally, due to C++ template magic, _S_empty_rep_storage will be marked
+// as a coalesced symbol, meaning that the linker will combine multiple
+// instances into a single one when generating output.
+//
+// If a string class is used by multiple shared libraries, a problem occurs.
+// Each library will get its own copy of _S_empty_rep_storage.  When strings
+// are passed across a library boundary for alteration or destruction, memory
+// errors will result.  GNU libstdc++ contains a configuration option,
+// --enable-fully-dynamic-string (_GLIBCXX_FULLY_DYNAMIC_STRING), which
+// disables the static data member optimization, but it's a good optimization
+// and non-STL code is generally at the mercy of the system's STL
+// configuration.  Fully-dynamic strings are not the default for GNU libstdc++
+// libstdc++ itself or for the libstdc++ installations on the systems we care
+// about, such as Mac OS X and relevant flavors of Linux.
+//
+// See also http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24196 .
+//
+// To avoid problems, string classes need to be explicitly instantiated only
+// once, in exactly one library.  All other string users see it via an "extern"
+// declaration.  This is precisely how GNU libstdc++ handles
+// std::basic_string<char> (string) and std::basic_string<wchar_t> (wstring).
+//
+// This also works around a Mac OS X linker bug in ld64-85.2.1 (Xcode 3.1.2),
+// in which the linker does not fully coalesce symbols when dead code
+// stripping is enabled.  This bug causes the memory errors described above
+// to occur even when a std::basic_string<> does not cross shared library
+// boundaries, such as in statically-linked executables.
+//
+// TODO(mark): File this bug with Apple and update this note with a bug number.
+
+extern template class std::basic_string<char16, base::string16_char_traits>;
+
+typedef std::basic_string<char16, base::string16_char_traits> string16;
+
+extern std::ostream& operator<<(std::ostream& out, const string16& str);
+
+#endif  // WCHAR_T_IS_UTF32
+
+#endif  // BASE_STRING16_H_
diff --git a/ipc/chromium/src/base/string_piece.cc b/ipc/chromium/src/base/string_piece.cc
new file mode 100644
index 0000000000..7b83df0758
--- /dev/null
+++ b/ipc/chromium/src/base/string_piece.cc
@@ -0,0 +1,190 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+// Copied from strings/stringpiece.cc with modifications
+
+#include <algorithm>
+#include <ostream>
+
+#include "base/string_piece.h"
+
+typedef StringPiece::size_type size_type;
+
+std::ostream& operator<<(std::ostream& o, const StringPiece& piece) {
+  o.write(piece.data(), static_cast<std::streamsize>(piece.size()));
+  return o;
+}
+
+bool operator==(const StringPiece& x, const StringPiece& y) {
+  if (x.size() != y.size()) return false;
+
+  return StringPiece::wordmemcmp(x.data(), y.data(), x.size()) == 0;
+}
+
+void StringPiece::CopyToString(std::string* target) const {
+  target->assign(!empty() ? data() : "", size());
+}
+
+void StringPiece::AppendToString(std::string* target) const {
+  if (!empty()) target->append(data(), size());
+}
+
+size_type StringPiece::copy(char* buf, size_type n, size_type pos) const {
+  size_type ret = std::min(length_ - pos, n);
+  memcpy(buf, ptr_ + pos, ret);
+  return ret;
+}
+
+size_type StringPiece::find(const StringPiece& s, size_type pos) const {
+  if (pos > length_) return npos;
+
+  const char* result =
+      std::search(ptr_ + pos, ptr_ + length_, s.ptr_, s.ptr_ + s.length_);
+  const size_type xpos = result - ptr_;
+  return xpos + s.length_ <= length_ ? xpos : npos;
+}
+
+size_type StringPiece::find(char c, size_type pos) const {
+  if (pos >= length_) return npos;
+
+  const char* result = std::find(ptr_ + pos, ptr_ + length_, c);
+  return result != ptr_ + length_ ? result - ptr_ : npos;
+}
+
+size_type StringPiece::rfind(const StringPiece& s, size_type pos) const {
+  if (length_ < s.length_) return npos;
+
+  if (s.empty()) return std::min(length_, pos);
+
+  const char* last = ptr_ + std::min(length_ - s.length_, pos) + s.length_;
+  const char* result = std::find_end(ptr_, last, s.ptr_, s.ptr_ + s.length_);
+  return result != last ? result - ptr_ : npos;
+}
+
+size_type StringPiece::rfind(char c, size_type pos) const {
+  if (length_ == 0) return npos;
+
+  for (size_type i = std::min(pos, length_ - 1);; --i) {
+    if (ptr_[i] == c) return i;
+    if (i == 0) break;
+  }
+  return npos;
+}
+
+// For each character in characters_wanted, sets the index corresponding
+// to the ASCII code of that character to 1 in table.  This is used by
+// the find_.*_of methods below to tell whether or not a character is in
+// the lookup table in constant time.
+// The argument `table' must be an array that is large enough to hold all
+// the possible values of an unsigned char.  Thus it should be be declared
+// as follows:
+//   bool table[UCHAR_MAX + 1]
+static inline void BuildLookupTable(const StringPiece& characters_wanted,
+                                    bool* table) {
+  const size_type length = characters_wanted.length();
+  const char* const data = characters_wanted.data();
+  for (size_type i = 0; i < length; ++i) {
+    table[static_cast<unsigned char>(data[i])] = true;
+  }
+}
+
+size_type StringPiece::find_first_of(const StringPiece& s,
+                                     size_type pos) const {
+  if (length_ == 0 || s.length_ == 0) return npos;
+
+  // Avoid the cost of BuildLookupTable() for a single-character search.
+  if (s.length_ == 1) return find_first_of(s.ptr_[0], pos);
+
+  bool lookup[UCHAR_MAX + 1] = {false};
+  BuildLookupTable(s, lookup);
+  for (size_type i = pos; i < length_; ++i) {
+    if (lookup[static_cast<unsigned char>(ptr_[i])]) {
+      return i;
+    }
+  }
+  return npos;
+}
+
+size_type StringPiece::find_first_not_of(const StringPiece& s,
+                                         size_type pos) const {
+  if (length_ == 0) return npos;
+
+  if (s.length_ == 0) return 0;
+
+  // Avoid the cost of BuildLookupTable() for a single-character search.
+  if (s.length_ == 1) return find_first_not_of(s.ptr_[0], pos);
+
+  bool lookup[UCHAR_MAX + 1] = {false};
+  BuildLookupTable(s, lookup);
+  for (size_type i = pos; i < length_; ++i) {
+    if (!lookup[static_cast<unsigned char>(ptr_[i])]) {
+      return i;
+    }
+  }
+  return npos;
+}
+
+size_type StringPiece::find_first_not_of(char c, size_type pos) const {
+  if (length_ == 0) return npos;
+
+  for (; pos < length_; ++pos) {
+    if (ptr_[pos] != c) {
+      return pos;
+    }
+  }
+  return npos;
+}
+
+size_type StringPiece::find_last_of(const StringPiece& s, size_type pos) const {
+  if (length_ == 0 || s.length_ == 0) return npos;
+
+  // Avoid the cost of BuildLookupTable() for a single-character search.
+  if (s.length_ == 1) return find_last_of(s.ptr_[0], pos);
+
+  bool lookup[UCHAR_MAX + 1] = {false};
+  BuildLookupTable(s, lookup);
+  for (size_type i = std::min(pos, length_ - 1);; --i) {
+    if (lookup[static_cast<unsigned char>(ptr_[i])]) return i;
+    if (i == 0) break;
+  }
+  return npos;
+}
+
+size_type StringPiece::find_last_not_of(const StringPiece& s,
+                                        size_type pos) const {
+  if (length_ == 0) return npos;
+
+  size_type i = std::min(pos, length_ - 1);
+  if (s.length_ == 0) return i;
+
+  // Avoid the cost of BuildLookupTable() for a single-character search.
+  if (s.length_ == 1) return find_last_not_of(s.ptr_[0], pos);
+
+  bool lookup[UCHAR_MAX + 1] = {false};
+  BuildLookupTable(s, lookup);
+  for (;; --i) {
+    if (!lookup[static_cast<unsigned char>(ptr_[i])]) return i;
+    if (i == 0) break;
+  }
+  return npos;
+}
+
+size_type StringPiece::find_last_not_of(char c, size_type pos) const {
+  if (length_ == 0) return npos;
+
+  for (size_type i = std::min(pos, length_ - 1);; --i) {
+    if (ptr_[i] != c) return i;
+    if (i == 0) break;
+  }
+  return npos;
+}
+
+StringPiece StringPiece::substr(size_type pos, size_type n) const {
+  if (pos > length_) pos = length_;
+  if (n > length_ - pos) n = length_ - pos;
+  return StringPiece(ptr_ + pos, n);
+}
+
+const StringPiece::size_type StringPiece::npos = size_type(-1);
diff --git a/ipc/chromium/src/base/string_piece.h b/ipc/chromium/src/base/string_piece.h
new file mode 100644
index 0000000000..8ebdb281d1
--- /dev/null
+++ b/ipc/chromium/src/base/string_piece.h
@@ -0,0 +1,189 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+// Copied from strings/stringpiece.h with modifications
+//
+// A string-like object that points to a sized piece of memory.
+//
+// Functions or methods may use const StringPiece& parameters to accept either
+// a "const char*" or a "string" value that will be implicitly converted to
+// a StringPiece.  The implicit conversion means that it is often appropriate
+// to include this .h file in other files rather than forward-declaring
+// StringPiece as would be appropriate for most other Google classes.
+//
+// Systematic usage of StringPiece is encouraged as it will reduce unnecessary
+// conversions from "const char*" to "string" and back again.
+//
+
+#ifndef BASE_STRING_PIECE_H_
+#define BASE_STRING_PIECE_H_
+
+#include <algorithm>
+#include <iosfwd>
+#include <string>
+
+#include "base/basictypes.h"
+
+class StringPiece {
+ public:
+  typedef size_t size_type;
+
+ private:
+  const char* ptr_;
+  size_type length_;
+
+ public:
+  // We provide non-explicit singleton constructors so users can pass
+  // in a "const char*" or a "string" wherever a "StringPiece" is
+  // expected.
+  StringPiece() : ptr_(NULL), length_(0) {}
+  MOZ_IMPLICIT StringPiece(const char* str)
+      : ptr_(str), length_((str == NULL) ? 0 : strlen(str)) {}
+  MOZ_IMPLICIT StringPiece(const std::string& str)
+      : ptr_(str.data()), length_(str.size()) {}
+  StringPiece(const char* offset, size_type len) : ptr_(offset), length_(len) {}
+
+  // data() may return a pointer to a buffer with embedded NULs, and the
+  // returned buffer may or may not be null terminated.  Therefore it is
+  // typically a mistake to pass data() to a routine that expects a NUL
+  // terminated string.
+  const char* data() const { return ptr_; }
+  size_type size() const { return length_; }
+  size_type length() const { return length_; }
+  bool empty() const { return length_ == 0; }
+
+  void clear() {
+    ptr_ = NULL;
+    length_ = 0;
+  }
+  void set(const char* aData, size_type aLen) {
+    ptr_ = aData;
+    length_ = aLen;
+  }
+  void set(const char* str) {
+    ptr_ = str;
+    length_ = str ? strlen(str) : 0;
+  }
+  void set(const void* aData, size_type aLen) {
+    ptr_ = reinterpret_cast<const char*>(aData);
+    length_ = aLen;
+  }
+
+  char operator[](size_type i) const { return ptr_[i]; }
+
+  void remove_prefix(size_type n) {
+    ptr_ += n;
+    length_ -= n;
+  }
+
+  void remove_suffix(size_type n) { length_ -= n; }
+
+  int compare(const StringPiece& x) const {
+    int r = wordmemcmp(ptr_, x.ptr_, std::min(length_, x.length_));
+    if (r == 0) {
+      if (length_ < x.length_)
+        r = -1;
+      else if (length_ > x.length_)
+        r = +1;
+    }
+    return r;
+  }
+
+  std::string as_string() const {
+    // std::string doesn't like to take a NULL pointer even with a 0 size.
+    return std::string(!empty() ? data() : "", size());
+  }
+
+  void CopyToString(std::string* target) const;
+  void AppendToString(std::string* target) const;
+
+  // Does "this" start with "x"
+  bool starts_with(const StringPiece& x) const {
+    return ((length_ >= x.length_) &&
+            (wordmemcmp(ptr_, x.ptr_, x.length_) == 0));
+  }
+
+  // Does "this" end with "x"
+  bool ends_with(const StringPiece& x) const {
+    return ((length_ >= x.length_) &&
+            (wordmemcmp(ptr_ + (length_ - x.length_), x.ptr_, x.length_) == 0));
+  }
+
+  // standard STL container boilerplate
+  typedef char value_type;
+  typedef const char* pointer;
+  typedef const char& reference;
+  typedef const char& const_reference;
+  typedef ptrdiff_t difference_type;
+  static const size_type npos;
+  typedef const char* const_iterator;
+  typedef const char* iterator;
+  typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
+  typedef std::reverse_iterator<iterator> reverse_iterator;
+  iterator begin() const { return ptr_; }
+  iterator end() const { return ptr_ + length_; }
+  const_reverse_iterator rbegin() const {
+    return const_reverse_iterator(ptr_ + length_);
+  }
+  const_reverse_iterator rend() const { return const_reverse_iterator(ptr_); }
+
+  size_type max_size() const { return length_; }
+  size_type capacity() const { return length_; }
+
+  size_type copy(char* buf, size_type n, size_type pos = 0) const;
+
+  size_type find(const StringPiece& s, size_type pos = 0) const;
+  size_type find(char c, size_type pos = 0) const;
+  size_type rfind(const StringPiece& s, size_type pos = npos) const;
+  size_type rfind(char c, size_type pos = npos) const;
+
+  size_type find_first_of(const StringPiece& s, size_type pos = 0) const;
+  size_type find_first_of(char c, size_type pos = 0) const {
+    return find(c, pos);
+  }
+  size_type find_first_not_of(const StringPiece& s, size_type pos = 0) const;
+  size_type find_first_not_of(char c, size_type pos = 0) const;
+  size_type find_last_of(const StringPiece& s, size_type pos = npos) const;
+  size_type find_last_of(char c, size_type pos = npos) const {
+    return rfind(c, pos);
+  }
+  size_type find_last_not_of(const StringPiece& s, size_type pos = npos) const;
+  size_type find_last_not_of(char c, size_type pos = npos) const;
+
+  StringPiece substr(size_type pos, size_type n = npos) const;
+
+  static int wordmemcmp(const char* p, const char* p2, size_type N) {
+    return memcmp(p, p2, N);
+  }
+};
+
+bool operator==(const ::StringPiece& x, const ::StringPiece& y);
+
+inline bool operator!=(const ::StringPiece& x, const ::StringPiece& y) {
+  return !(x == y);
+}
+
+inline bool operator<(const ::StringPiece& x, const ::StringPiece& y) {
+  const int r = ::StringPiece::wordmemcmp(x.data(), y.data(),
+                                          std::min(x.size(), y.size()));
+  return ((r < 0) || ((r == 0) && (x.size() < y.size())));
+}
+
+inline bool operator>(const ::StringPiece& x, const ::StringPiece& y) {
+  return y < x;
+}
+
+inline bool operator<=(const ::StringPiece& x, const ::StringPiece& y) {
+  return !(x > y);
+}
+
+inline bool operator>=(const ::StringPiece& x, const ::StringPiece& y) {
+  return !(x < y);
+}
+
+// allow StringPiece to be logged (needed for unit testing).
+extern std::ostream& operator<<(std::ostream& o, const ::StringPiece& piece);
+
+#endif  // BASE_STRING_PIECE_H_
diff --git a/ipc/chromium/src/base/string_util.cc b/ipc/chromium/src/base/string_util.cc
new file mode 100644
index 0000000000..6217721f8f
--- /dev/null
+++ b/ipc/chromium/src/base/string_util.cc
@@ -0,0 +1,721 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/string_util.h"
+
+#include "build/build_config.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <math.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <wchar.h>
+#include <wctype.h>
+
+#include <algorithm>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+
+namespace {
+
+// Hack to convert any char-like type to its unsigned counterpart.
+// For example, it will convert char, signed char and unsigned char to unsigned
+// char.
+template <typename T>
+struct ToUnsigned {
+  typedef T Unsigned;
+};
+
+template <>
+struct ToUnsigned<char> {
+  typedef unsigned char Unsigned;
+};
+template <>
+struct ToUnsigned<signed char> {
+  typedef unsigned char Unsigned;
+};
+template <>
+struct ToUnsigned<wchar_t> {
+#if defined(WCHAR_T_IS_UTF16)
+  typedef unsigned short Unsigned;
+#elif defined(WCHAR_T_IS_UTF32)
+  typedef uint32_t Unsigned;
+#endif
+};
+template <>
+struct ToUnsigned<short> {
+  typedef unsigned short Unsigned;
+};
+
+// Generalized string-to-number conversion.
+//
+// StringToNumberTraits should provide:
+//  - a typedef for string_type, the STL string type used as input.
+//  - a typedef for value_type, the target numeric type.
+//  - a static function, convert_func, which dispatches to an appropriate
+//    strtol-like function and returns type value_type.
+//  - a static function, valid_func, which validates |input| and returns a bool
+//    indicating whether it is in proper form.  This is used to check for
+//    conditions that convert_func tolerates but should result in
+//    StringToNumber returning false.  For strtol-like funtions, valid_func
+//    should check for leading whitespace.
+template <typename StringToNumberTraits>
+bool StringToNumber(const typename StringToNumberTraits::string_type& input,
+                    typename StringToNumberTraits::value_type* output) {
+  typedef StringToNumberTraits traits;
+
+  errno = 0;  // Thread-safe?  It is on at least Mac, Linux, and Windows.
+  typename traits::string_type::value_type* endptr = NULL;
+  typename traits::value_type value =
+      traits::convert_func(input.c_str(), &endptr);
+  *output = value;
+
+  // Cases to return false:
+  //  - If errno is ERANGE, there was an overflow or underflow.
+  //  - If the input string is empty, there was nothing to parse.
+  //  - If endptr does not point to the end of the string, there are either
+  //    characters remaining in the string after a parsed number, or the string
+  //    does not begin with a parseable number.  endptr is compared to the
+  //    expected end given the string's stated length to correctly catch cases
+  //    where the string contains embedded NUL characters.
+  //  - valid_func determines that the input is not in preferred form.
+  return errno == 0 && !input.empty() &&
+         input.c_str() + input.length() == endptr && traits::valid_func(input);
+}
+
+class StringToLongTraits {
+ public:
+  typedef std::string string_type;
+  typedef long value_type;
+  static const int kBase = 10;
+  static inline value_type convert_func(const string_type::value_type* str,
+                                        string_type::value_type** endptr) {
+    return strtol(str, endptr, kBase);
+  }
+  static inline bool valid_func(const string_type& str) {
+    return !str.empty() && !isspace(str[0]);
+  }
+};
+
+class String16ToLongTraits {
+ public:
+  typedef string16 string_type;
+  typedef long value_type;
+  static const int kBase = 10;
+  static inline value_type convert_func(const string_type::value_type* str,
+                                        string_type::value_type** endptr) {
+#if defined(WCHAR_T_IS_UTF16)
+    return wcstol(str, endptr, kBase);
+#elif defined(WCHAR_T_IS_UTF32)
+    std::string ascii_string = UTF16ToASCII(string16(str));
+    char* ascii_end = NULL;
+    value_type ret = strtol(ascii_string.c_str(), &ascii_end, kBase);
+    if (ascii_string.c_str() + ascii_string.length() == ascii_end) {
+      *endptr =
+          const_cast<string_type::value_type*>(str) + ascii_string.length();
+    }
+    return ret;
+#endif
+  }
+  static inline bool valid_func(const string_type& str) {
+    return !str.empty() && !iswspace(str[0]);
+  }
+};
+
+class StringToInt64Traits {
+ public:
+  typedef std::string string_type;
+  typedef int64_t value_type;
+  static const int kBase = 10;
+  static inline value_type convert_func(const string_type::value_type* str,
+                                        string_type::value_type** endptr) {
+#ifdef OS_WIN
+    return _strtoi64(str, endptr, kBase);
+#else  // assume OS_POSIX
+    return strtoll(str, endptr, kBase);
+#endif
+  }
+  static inline bool valid_func(const string_type& str) {
+    return !str.empty() && !isspace(str[0]);
+  }
+};
+
+class String16ToInt64Traits {
+ public:
+  typedef string16 string_type;
+  typedef int64_t value_type;
+  static const int kBase = 10;
+  static inline value_type convert_func(const string_type::value_type* str,
+                                        string_type::value_type** endptr) {
+#ifdef OS_WIN
+    return _wcstoi64(str, endptr, kBase);
+#else  // assume OS_POSIX
+    std::string ascii_string = UTF16ToASCII(string16(str));
+    char* ascii_end = NULL;
+    value_type ret = strtoll(ascii_string.c_str(), &ascii_end, kBase);
+    if (ascii_string.c_str() + ascii_string.length() == ascii_end) {
+      *endptr =
+          const_cast<string_type::value_type*>(str) + ascii_string.length();
+    }
+    return ret;
+#endif
+  }
+  static inline bool valid_func(const string_type& str) {
+    return !str.empty() && !iswspace(str[0]);
+  }
+};
+
+}  // namespace
+
+namespace base {
+
+bool IsWprintfFormatPortable(const wchar_t* format) {
+  for (const wchar_t* position = format; *position != '\0'; ++position) {
+    if (*position == '%') {
+      bool in_specification = true;
+      bool modifier_l = false;
+      while (in_specification) {
+        // Eat up characters until reaching a known specifier.
+        if (*++position == '\0') {
+          // The format string ended in the middle of a specification.  Call
+          // it portable because no unportable specifications were found.  The
+          // string is equally broken on all platforms.
+          return true;
+        }
+
+        if (*position == 'l') {
+          // 'l' is the only thing that can save the 's' and 'c' specifiers.
+          modifier_l = true;
+        } else if (((*position == 's' || *position == 'c') && !modifier_l) ||
+                   *position == 'S' || *position == 'C' || *position == 'F' ||
+                   *position == 'D' || *position == 'O' || *position == 'U') {
+          // Not portable.
+          return false;
+        }
+
+        if (wcschr(L"diouxXeEfgGaAcspn%", *position)) {
+          // Portable, keep scanning the rest of the format string.
+          in_specification = false;
+        }
+      }
+    }
+  }
+
+  return true;
+}
+
+}  // namespace base
+
+static const wchar_t kWhitespaceWide[] = {
+    0x0009,  // <control-0009> to <control-000D>
+    0x000A, 0x000B, 0x000C, 0x000D,
+    0x0020,  // Space
+    0x0085,  // <control-0085>
+    0x00A0,  // No-Break Space
+    0x1680,  // Ogham Space Mark
+    0x180E,  // Mongolian Vowel Separator
+    0x2000,  // En Quad to Hair Space
+    0x2001, 0x2002, 0x2003, 0x2004, 0x2005,
+    0x2006, 0x2007, 0x2008, 0x2009, 0x200A,
+    0x200C,  // Zero Width Non-Joiner
+    0x2028,  // Line Separator
+    0x2029,  // Paragraph Separator
+    0x202F,  // Narrow No-Break Space
+    0x205F,  // Medium Mathematical Space
+    0x3000,  // Ideographic Space
+    0};
+static const char kWhitespaceASCII[] = {
+    0x09,  // <control-0009> to <control-000D>
+    0x0A, 0x0B, 0x0C, 0x0D,
+    0x20,  // Space
+    0};
+
+template <typename STR>
+TrimPositions TrimStringT(const STR& input,
+                          const typename STR::value_type trim_chars[],
+                          TrimPositions positions, STR* output) {
+  // Find the edges of leading/trailing whitespace as desired.
+  const typename STR::size_type last_char = input.length() - 1;
+  const typename STR::size_type first_good_char =
+      (positions & TRIM_LEADING) ? input.find_first_not_of(trim_chars) : 0;
+  const typename STR::size_type last_good_char =
+      (positions & TRIM_TRAILING) ? input.find_last_not_of(trim_chars)
+                                  : last_char;
+
+  // When the string was all whitespace, report that we stripped off whitespace
+  // from whichever position the caller was interested in.  For empty input, we
+  // stripped no whitespace, but we still need to clear |output|.
+  if (input.empty() || (first_good_char == STR::npos) ||
+      (last_good_char == STR::npos)) {
+    bool input_was_empty = input.empty();  // in case output == &input
+    output->clear();
+    return input_was_empty ? TRIM_NONE : positions;
+  }
+
+  // Trim the whitespace.
+  *output = input.substr(first_good_char, last_good_char - first_good_char + 1);
+
+  // Return where we trimmed from.
+  return static_cast<TrimPositions>(
+      ((first_good_char == 0) ? TRIM_NONE : TRIM_LEADING) |
+      ((last_good_char == last_char) ? TRIM_NONE : TRIM_TRAILING));
+}
+
+TrimPositions TrimWhitespace(const std::wstring& input, TrimPositions positions,
+                             std::wstring* output) {
+  return TrimStringT(input, kWhitespaceWide, positions, output);
+}
+
+TrimPositions TrimWhitespaceASCII(const std::string& input,
+                                  TrimPositions positions,
+                                  std::string* output) {
+  return TrimStringT(input, kWhitespaceASCII, positions, output);
+}
+
+// This function is only for backward-compatibility.
+// To be removed when all callers are updated.
+TrimPositions TrimWhitespace(const std::string& input, TrimPositions positions,
+                             std::string* output) {
+  return TrimWhitespaceASCII(input, positions, output);
+}
+
+std::string WideToASCII(const std::wstring& wide) {
+  DCHECK(IsStringASCII(wide));
+  return std::string(wide.begin(), wide.end());
+}
+
+std::wstring ASCIIToWide(const std::string& ascii) {
+  DCHECK(IsStringASCII(ascii));
+  return std::wstring(ascii.begin(), ascii.end());
+}
+
+std::string UTF16ToASCII(const string16& utf16) {
+  DCHECK(IsStringASCII(utf16));
+  return std::string(utf16.begin(), utf16.end());
+}
+
+string16 ASCIIToUTF16(const std::string& ascii) {
+  DCHECK(IsStringASCII(ascii));
+  return string16(ascii.begin(), ascii.end());
+}
+
+template <class STR>
+static bool DoIsStringASCII(const STR& str) {
+  for (size_t i = 0; i < str.length(); i++) {
+    typename ToUnsigned<typename STR::value_type>::Unsigned c = str[i];
+    if (c > 0x7F) return false;
+  }
+  return true;
+}
+
+bool IsStringASCII(const std::wstring& str) { return DoIsStringASCII(str); }
+
+#if !defined(WCHAR_T_IS_UTF16)
+bool IsStringASCII(const string16& str) { return DoIsStringASCII(str); }
+#endif
+
+bool IsStringASCII(const std::string& str) { return DoIsStringASCII(str); }
+
+// Overloaded wrappers around vsnprintf and vswprintf. The buf_size parameter
+// is the size of the buffer. These return the number of characters in the
+// formatted string excluding the NUL terminator. If the buffer is not
+// large enough to accommodate the formatted string without truncation, they
+// return the number of characters that would be in the fully-formatted string
+// (vsnprintf, and vswprintf on Windows), or -1 (vswprintf on POSIX platforms).
+inline int vsnprintfT(char* buffer, size_t buf_size, const char* format,
+                      va_list argptr) {
+  return base::vsnprintf(buffer, buf_size, format, argptr);
+}
+
+inline int vsnprintfT(wchar_t* buffer, size_t buf_size, const wchar_t* format,
+                      va_list argptr) {
+  return base::vswprintf(buffer, buf_size, format, argptr);
+}
+
+// Templatized backend for StringPrintF/StringAppendF. This does not finalize
+// the va_list, the caller is expected to do that.
+template <class StringType>
+static void StringAppendVT(StringType* dst,
+                           const typename StringType::value_type* format,
+                           va_list ap) {
+  // First try with a small fixed size buffer.
+  // This buffer size should be kept in sync with StringUtilTest.GrowBoundary
+  // and StringUtilTest.StringPrintfBounds.
+  typename StringType::value_type stack_buf[1024];
+
+  va_list backup_ap;
+  base_va_copy(backup_ap, ap);
+
+#if !defined(OS_WIN)
+  errno = 0;
+#endif
+  int result = vsnprintfT(stack_buf, arraysize(stack_buf), format, backup_ap);
+  va_end(backup_ap);
+
+  if (result >= 0 && result < static_cast<int>(arraysize(stack_buf))) {
+    // It fit.
+    dst->append(stack_buf, result);
+    return;
+  }
+
+  // Repeatedly increase buffer size until it fits.
+  int mem_length = arraysize(stack_buf);
+  while (true) {
+    if (result < 0) {
+#if !defined(OS_WIN)
+      // On Windows, vsnprintfT always returns the number of characters in a
+      // fully-formatted string, so if we reach this point, something else is
+      // wrong and no amount of buffer-doubling is going to fix it.
+      if (errno != 0 && errno != EOVERFLOW)
+#endif
+      {
+        // If an error other than overflow occurred, it's never going to work.
+        DLOG(WARNING) << "Unable to printf the requested string due to error.";
+        return;
+      }
+      // Try doubling the buffer size.
+      mem_length *= 2;
+    } else {
+      // We need exactly "result + 1" characters.
+      mem_length = result + 1;
+    }
+
+    if (mem_length > 32 * 1024 * 1024) {
+      // That should be plenty, don't try anything larger.  This protects
+      // against huge allocations when using vsnprintfT implementations that
+      // return -1 for reasons other than overflow without setting errno.
+      DLOG(WARNING) << "Unable to printf the requested string due to size.";
+      return;
+    }
+
+    std::vector<typename StringType::value_type> mem_buf(mem_length);
+
+    // Restore the va_list before we use it again.
+    base_va_copy(backup_ap, ap);
+
+    result = vsnprintfT(&mem_buf[0], mem_length, format, ap);
+    va_end(backup_ap);
+
+    if ((result >= 0) && (result < mem_length)) {
+      // It fit.
+      dst->append(&mem_buf[0], result);
+      return;
+    }
+  }
+}
+
+namespace {
+
+template <typename STR, typename INT, typename UINT, bool NEG>
+struct IntToStringT {
+  // This is to avoid a compiler warning about unary minus on unsigned type.
+  // For example, say you had the following code:
+  //   template <typename INT>
+  //   INT abs(INT value) { return value < 0 ? -value : value; }
+  // Even though if INT is unsigned, it's impossible for value < 0, so the
+  // unary minus will never be taken, the compiler will still generate a
+  // warning.  We do a little specialization dance...
+  template <typename INT2, typename UINT2, bool NEG2>
+  struct ToUnsignedT {};
+
+  template <typename INT2, typename UINT2>
+  struct ToUnsignedT<INT2, UINT2, false> {
+    static UINT2 ToUnsigned(INT2 value) { return static_cast<UINT2>(value); }
+  };
+
+  template <typename INT2, typename UINT2>
+  struct ToUnsignedT<INT2, UINT2, true> {
+    static UINT2 ToUnsigned(INT2 value) {
+      return static_cast<UINT2>(value < 0 ? -value : value);
+    }
+  };
+
+  // This set of templates is very similar to the above templates, but
+  // for testing whether an integer is negative.
+  template <typename INT2, bool NEG2>
+  struct TestNegT {};
+  template <typename INT2>
+  struct TestNegT<INT2, false> {
+    static bool TestNeg(INT2 value) {
+      // value is unsigned, and can never be negative.
+      return false;
+    }
+  };
+  template <typename INT2>
+  struct TestNegT<INT2, true> {
+    static bool TestNeg(INT2 value) { return value < 0; }
+  };
+
+  static STR IntToString(INT value) {
+    // log10(2) ~= 0.3 bytes needed per bit or per byte log10(2**8) ~= 2.4.
+    // So round up to allocate 3 output characters per byte, plus 1 for '-'.
+    const int kOutputBufSize = 3 * sizeof(INT) + 1;
+
+    // Allocate the whole string right away, we will right back to front, and
+    // then return the substr of what we ended up using.
+    STR outbuf(kOutputBufSize, 0);
+
+    bool is_neg = TestNegT<INT, NEG>::TestNeg(value);
+    // Even though is_neg will never be true when INT is parameterized as
+    // unsigned, even the presence of the unary operation causes a warning.
+    UINT res = ToUnsignedT<INT, UINT, NEG>::ToUnsigned(value);
+
+    for (typename STR::iterator it = outbuf.end();;) {
+      --it;
+      DCHECK(it != outbuf.begin());
+      *it = static_cast<typename STR::value_type>((res % 10) + '0');
+      res /= 10;
+
+      // We're done..
+      if (res == 0) {
+        if (is_neg) {
+          --it;
+          DCHECK(it != outbuf.begin());
+          *it = static_cast<typename STR::value_type>('-');
+        }
+        return STR(it, outbuf.end());
+      }
+    }
+    NOTREACHED();
+    return STR();
+  }
+};
+
+}  // namespace
+
+std::string IntToString(int value) {
+  return IntToStringT<std::string, int, unsigned int, true>::IntToString(value);
+}
+std::wstring IntToWString(int value) {
+  return IntToStringT<std::wstring, int, unsigned int, true>::IntToString(
+      value);
+}
+std::string UintToString(unsigned int value) {
+  return IntToStringT<std::string, unsigned int, unsigned int,
+                      false>::IntToString(value);
+}
+std::wstring UintToWString(unsigned int value) {
+  return IntToStringT<std::wstring, unsigned int, unsigned int,
+                      false>::IntToString(value);
+}
+std::string Int64ToString(int64_t value) {
+  return IntToStringT<std::string, int64_t, uint64_t, true>::IntToString(value);
+}
+std::wstring Int64ToWString(int64_t value) {
+  return IntToStringT<std::wstring, int64_t, uint64_t, true>::IntToString(
+      value);
+}
+std::string Uint64ToString(uint64_t value) {
+  return IntToStringT<std::string, uint64_t, uint64_t, false>::IntToString(
+      value);
+}
+std::wstring Uint64ToWString(uint64_t value) {
+  return IntToStringT<std::wstring, uint64_t, uint64_t, false>::IntToString(
+      value);
+}
+
+// Lower-level routine that takes a va_list and appends to a specified
+// string.  All other routines are just convenience wrappers around it.
+static void StringAppendV(std::string* dst, const char* format, va_list ap) {
+  StringAppendVT(dst, format, ap);
+}
+
+static void StringAppendV(std::wstring* dst, const wchar_t* format,
+                          va_list ap) {
+  StringAppendVT(dst, format, ap);
+}
+
+std::string StringPrintf(const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  std::string result;
+  StringAppendV(&result, format, ap);
+  va_end(ap);
+  return result;
+}
+
+std::wstring StringPrintf(const wchar_t* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  std::wstring result;
+  StringAppendV(&result, format, ap);
+  va_end(ap);
+  return result;
+}
+
+const std::string& SStringPrintf(std::string* dst, const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  dst->clear();
+  StringAppendV(dst, format, ap);
+  va_end(ap);
+  return *dst;
+}
+
+const std::wstring& SStringPrintf(std::wstring* dst, const wchar_t* format,
+                                  ...) {
+  va_list ap;
+  va_start(ap, format);
+  dst->clear();
+  StringAppendV(dst, format, ap);
+  va_end(ap);
+  return *dst;
+}
+
+void StringAppendF(std::string* dst, const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  StringAppendV(dst, format, ap);
+  va_end(ap);
+}
+
+void StringAppendF(std::wstring* dst, const wchar_t* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  StringAppendV(dst, format, ap);
+  va_end(ap);
+}
+
+template <typename STR>
+static void SplitStringT(const STR& str, const typename STR::value_type s,
+                         bool trim_whitespace, std::vector<STR>* r) {
+  size_t last = 0;
+  size_t i;
+  size_t c = str.size();
+  for (i = 0; i <= c; ++i) {
+    if (i == c || str[i] == s) {
+      size_t len = i - last;
+      STR tmp = str.substr(last, len);
+      if (trim_whitespace) {
+        STR t_tmp;
+        TrimWhitespace(tmp, TRIM_ALL, &t_tmp);
+        r->push_back(t_tmp);
+      } else {
+        r->push_back(tmp);
+      }
+      last = i + 1;
+    }
+  }
+}
+
+void SplitString(const std::wstring& str, wchar_t s,
+                 std::vector<std::wstring>* r) {
+  SplitStringT(str, s, true, r);
+}
+
+void SplitString(const std::string& str, char s, std::vector<std::string>* r) {
+  SplitStringT(str, s, true, r);
+}
+
+// For the various *ToInt conversions, there are no *ToIntTraits classes to use
+// because there's no such thing as strtoi.  Use *ToLongTraits through a cast
+// instead, requiring that long and int are compatible and equal-width.  They
+// are on our target platforms.
+
+// XXX Sigh.
+
+#if !defined(ARCH_CPU_64_BITS)
+bool StringToInt(const std::string& input, int* output) {
+  COMPILE_ASSERT(sizeof(int) == sizeof(long), cannot_strtol_to_int);
+  return StringToNumber<StringToLongTraits>(input,
+                                            reinterpret_cast<long*>(output));
+}
+
+bool StringToInt(const string16& input, int* output) {
+  COMPILE_ASSERT(sizeof(int) == sizeof(long), cannot_wcstol_to_int);
+  return StringToNumber<String16ToLongTraits>(input,
+                                              reinterpret_cast<long*>(output));
+}
+
+#else
+bool StringToInt(const std::string& input, int* output) {
+  long tmp;
+  bool ok = StringToNumber<StringToLongTraits>(input, &tmp);
+  if (!ok || tmp > kint32max) {
+    return false;
+  }
+  *output = static_cast<int>(tmp);
+  return true;
+}
+
+bool StringToInt(const string16& input, int* output) {
+  long tmp;
+  bool ok = StringToNumber<String16ToLongTraits>(input, &tmp);
+  if (!ok || tmp > kint32max) {
+    return false;
+  }
+  *output = static_cast<int>(tmp);
+  return true;
+}
+#endif  //  !defined(ARCH_CPU_64_BITS)
+
+bool StringToInt64(const std::string& input, int64_t* output) {
+  return StringToNumber<StringToInt64Traits>(input, output);
+}
+
+bool StringToInt64(const string16& input, int64_t* output) {
+  return StringToNumber<String16ToInt64Traits>(input, output);
+}
+
+int StringToInt(const std::string& value) {
+  int result;
+  StringToInt(value, &result);
+  return result;
+}
+
+int StringToInt(const string16& value) {
+  int result;
+  StringToInt(value, &result);
+  return result;
+}
+
+int64_t StringToInt64(const std::string& value) {
+  int64_t result;
+  StringToInt64(value, &result);
+  return result;
+}
+
+int64_t StringToInt64(const string16& value) {
+  int64_t result;
+  StringToInt64(value, &result);
+  return result;
+}
+
+// The following code is compatible with the OpenBSD lcpy interface.  See:
+//   http://www.gratisoft.us/todd/papers/strlcpy.html
+//   ftp://ftp.openbsd.org/pub/OpenBSD/src/lib/libc/string/{wcs,str}lcpy.c
+
+namespace {
+
+template <typename CHAR>
+size_t lcpyT(CHAR* dst, const CHAR* src, size_t dst_size) {
+  for (size_t i = 0; i < dst_size; ++i) {
+    if ((dst[i] = src[i]) == 0)  // We hit and copied the terminating NULL.
+      return i;
+  }
+
+  // We were left off at dst_size.  We over copied 1 byte.  Null terminate.
+  if (dst_size != 0) dst[dst_size - 1] = 0;
+
+  // Count the rest of the |src|, and return it's length in characters.
+  while (src[dst_size]) ++dst_size;
+  return dst_size;
+}
+
+}  // namespace
+
+size_t base::strlcpy(char* dst, const char* src, size_t dst_size) {
+  return lcpyT<char>(dst, src, dst_size);
+}
+size_t base::wcslcpy(wchar_t* dst, const wchar_t* src, size_t dst_size) {
+  return lcpyT<wchar_t>(dst, src, dst_size);
+}
diff --git a/ipc/chromium/src/base/string_util.h b/ipc/chromium/src/base/string_util.h
new file mode 100644
index 0000000000..066a3fb678
--- /dev/null
+++ b/ipc/chromium/src/base/string_util.h
@@ -0,0 +1,231 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// This file defines utility functions for working with strings.
+
+#ifndef BASE_STRING_UTIL_H_
+#define BASE_STRING_UTIL_H_
+
+#include <stdarg.h>  // va_list
+#include <ctype.h>
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/string16.h"
+#include "base/string_piece.h"  // For implicit conversions.
+
+// Safe standard library wrappers for all platforms.
+
+namespace base {
+
+// C standard-library functions like "strncasecmp" and "snprintf" that aren't
+// cross-platform are provided as "base::strncasecmp", and their prototypes
+// are listed below.  These functions are then implemented as inline calls
+// to the platform-specific equivalents in the platform-specific headers.
+
+// Compare the two strings s1 and s2 without regard to case using
+// the current locale; returns 0 if they are equal, 1 if s1 > s2, and -1 if
+// s2 > s1 according to a lexicographic comparison.
+int strcasecmp(const char* s1, const char* s2);
+
+// Compare up to count characters of s1 and s2 without regard to case using
+// the current locale; returns 0 if they are equal, 1 if s1 > s2, and -1 if
+// s2 > s1 according to a lexicographic comparison.
+int strncasecmp(const char* s1, const char* s2, size_t count);
+
+// Wrapper for vsnprintf that always null-terminates and always returns the
+// number of characters that would be in an untruncated formatted
+// string, even when truncation occurs.
+int vsnprintf(char* buffer, size_t size, const char* format, va_list arguments);
+
+// vswprintf always null-terminates, but when truncation occurs, it will either
+// return -1 or the number of characters that would be in an untruncated
+// formatted string.  The actual return value depends on the underlying
+// C library's vswprintf implementation.
+int vswprintf(wchar_t* buffer, size_t size, const wchar_t* format,
+              va_list arguments);
+
+// Some of these implementations need to be inlined.
+
+inline int snprintf(char* buffer, size_t size, const char* format, ...) {
+  va_list arguments;
+  va_start(arguments, format);
+  int result = vsnprintf(buffer, size, format, arguments);
+  va_end(arguments);
+  return result;
+}
+
+inline int swprintf(wchar_t* buffer, size_t size, const wchar_t* format, ...) {
+  va_list arguments;
+  va_start(arguments, format);
+  int result = vswprintf(buffer, size, format, arguments);
+  va_end(arguments);
+  return result;
+}
+
+// BSD-style safe and consistent string copy functions.
+// Copies |src| to |dst|, where |dst_size| is the total allocated size of |dst|.
+// Copies at most |dst_size|-1 characters, and always NULL terminates |dst|, as
+// long as |dst_size| is not 0.  Returns the length of |src| in characters.
+// If the return value is >= dst_size, then the output was truncated.
+// NOTE: All sizes are in number of characters, NOT in bytes.
+size_t strlcpy(char* dst, const char* src, size_t dst_size);
+size_t wcslcpy(wchar_t* dst, const wchar_t* src, size_t dst_size);
+
+// Scan a wprintf format string to determine whether it's portable across a
+// variety of systems.  This function only checks that the conversion
+// specifiers used by the format string are supported and have the same meaning
+// on a variety of systems.  It doesn't check for other errors that might occur
+// within a format string.
+//
+// Nonportable conversion specifiers for wprintf are:
+//  - 's' and 'c' without an 'l' length modifier.  %s and %c operate on char
+//     data on all systems except Windows, which treat them as wchar_t data.
+//     Use %ls and %lc for wchar_t data instead.
+//  - 'S' and 'C', which operate on wchar_t data on all systems except Windows,
+//     which treat them as char data.  Use %ls and %lc for wchar_t data
+//     instead.
+//  - 'F', which is not identified by Windows wprintf documentation.
+//  - 'D', 'O', and 'U', which are deprecated and not available on all systems.
+//     Use %ld, %lo, and %lu instead.
+//
+// Note that there is no portable conversion specifier for char data when
+// working with wprintf.
+//
+// This function is intended to be called from base::vswprintf.
+bool IsWprintfFormatPortable(const wchar_t* format);
+
+}  // namespace base
+
+#if defined(OS_WIN)
+#  include "base/string_util_win.h"
+#elif defined(OS_POSIX)
+#  include "base/string_util_posix.h"
+#else
+#  error Define string operations appropriately for your platform
+#endif
+
+// Trims any whitespace from either end of the input string.  Returns where
+// whitespace was found.
+// The non-wide version has two functions:
+// * TrimWhitespaceASCII()
+//   This function is for ASCII strings and only looks for ASCII whitespace;
+// * TrimWhitespaceUTF8()
+//   This function is for UTF-8 strings and looks for Unicode whitespace.
+// Please choose the best one according to your usage.
+// NOTE: Safe to use the same variable for both input and output.
+enum TrimPositions {
+  TRIM_NONE = 0,
+  TRIM_LEADING = 1 << 0,
+  TRIM_TRAILING = 1 << 1,
+  TRIM_ALL = TRIM_LEADING | TRIM_TRAILING
+};
+TrimPositions TrimWhitespace(const std::wstring& input, TrimPositions positions,
+                             std::wstring* output);
+TrimPositions TrimWhitespaceASCII(const std::string& input,
+                                  TrimPositions positions, std::string* output);
+
+// Deprecated. This function is only for backward compatibility and calls
+// TrimWhitespaceASCII().
+TrimPositions TrimWhitespace(const std::string& input, TrimPositions positions,
+                             std::string* output);
+
+// Searches  for CR or LF characters.  Removes all contiguous whitespace
+// strings that contain them.  This is useful when trying to deal with text
+// copied from terminals.
+// Returns |text, with the following three transformations:
+// (1) Leading and trailing whitespace is trimmed.
+// (2) If |trim_sequences_with_line_breaks| is true, any other whitespace
+//     sequences containing a CR or LF are trimmed.
+// (3) All other whitespace sequences are converted to single spaces.
+std::wstring CollapseWhitespace(const std::wstring& text,
+                                bool trim_sequences_with_line_breaks);
+
+// These convert between ASCII (7-bit) and Wide/UTF16 strings.
+std::string WideToASCII(const std::wstring& wide);
+std::wstring ASCIIToWide(const std::string& ascii);
+std::string UTF16ToASCII(const string16& utf16);
+string16 ASCIIToUTF16(const std::string& ascii);
+
+// These convert between UTF-8, -16, and -32 strings. They are potentially slow,
+// so avoid unnecessary conversions. The low-level versions return a boolean
+// indicating whether the conversion was 100% valid. In this case, it will still
+// do the best it can and put the result in the output buffer. The versions that
+// return strings ignore this error and just return the best conversion
+// possible.
+bool WideToUTF8(const wchar_t* src, size_t src_len, std::string* output);
+std::string WideToUTF8(const std::wstring& wide);
+bool UTF8ToWide(const char* src, size_t src_len, std::wstring* output);
+std::wstring UTF8ToWide(const ::StringPiece& utf8);
+
+bool IsStringASCII(const std::wstring& str);
+bool IsStringASCII(const std::string& str);
+bool IsStringASCII(const string16& str);
+
+// Specialized string-conversion functions.
+std::string IntToString(int value);
+std::wstring IntToWString(int value);
+std::string UintToString(unsigned int value);
+std::wstring UintToWString(unsigned int value);
+std::string Int64ToString(int64_t value);
+std::wstring Int64ToWString(int64_t value);
+std::string Uint64ToString(uint64_t value);
+std::wstring Uint64ToWString(uint64_t value);
+// The DoubleToString methods convert the double to a string format that
+// ignores the locale.  If you want to use locale specific formatting, use ICU.
+std::string DoubleToString(double value);
+std::wstring DoubleToWString(double value);
+
+// Perform a best-effort conversion of the input string to a numeric type,
+// setting |*output| to the result of the conversion.  Returns true for
+// "perfect" conversions; returns false in the following cases:
+//  - Overflow/underflow.  |*output| will be set to the maximum value supported
+//    by the data type.
+//  - Trailing characters in the string after parsing the number.  |*output|
+//    will be set to the value of the number that was parsed.
+//  - No characters parseable as a number at the beginning of the string.
+//    |*output| will be set to 0.
+//  - Empty string.  |*output| will be set to 0.
+bool StringToInt(const std::string& input, int* output);
+bool StringToInt(const string16& input, int* output);
+bool StringToInt64(const std::string& input, int64_t* output);
+bool StringToInt64(const string16& input, int64_t* output);
+
+// Convenience forms of the above, when the caller is uninterested in the
+// boolean return value.  These return only the |*output| value from the
+// above conversions: a best-effort conversion when possible, otherwise, 0.
+int StringToInt(const std::string& value);
+int StringToInt(const string16& value);
+int64_t StringToInt64(const std::string& value);
+int64_t StringToInt64(const string16& value);
+
+// Return a C++ string given printf-like input.
+std::string StringPrintf(const char* format, ...);
+std::wstring StringPrintf(const wchar_t* format, ...);
+
+// Store result into a supplied string and return it
+const std::string& SStringPrintf(std::string* dst, const char* format, ...);
+const std::wstring& SStringPrintf(std::wstring* dst, const wchar_t* format,
+                                  ...);
+
+// Append result to a supplied string
+void StringAppendF(std::string* dst, const char* format, ...);
+void StringAppendF(std::wstring* dst, const wchar_t* format, ...);
+
+//-----------------------------------------------------------------------------
+
+// Splits |str| into a vector of strings delimited by |s|. Append the results
+// into |r| as they appear. If several instances of |s| are contiguous, or if
+// |str| begins with or ends with |s|, then an empty string is inserted.
+//
+// Every substring is trimmed of any leading or trailing white space.
+void SplitString(const std::wstring& str, wchar_t s,
+                 std::vector<std::wstring>* r);
+void SplitString(const std::string& str, char s, std::vector<std::string>* r);
+
+#endif  // BASE_STRING_UTIL_H_
diff --git a/ipc/chromium/src/base/string_util_posix.h b/ipc/chromium/src/base/string_util_posix.h
new file mode 100644
index 0000000000..02818a6441
--- /dev/null
+++ b/ipc/chromium/src/base/string_util_posix.h
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_STRING_UTIL_POSIX_H_
+#define BASE_STRING_UTIL_POSIX_H_
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+
+#include "base/logging.h"
+
+namespace base {
+
+// Chromium code style is to not use malloc'd strings; this is only for use
+// for interaction with APIs that require it.
+inline char* strdup(const char* str) { return ::strdup(str); }
+
+inline int strcasecmp(const char* string1, const char* string2) {
+  return ::strcasecmp(string1, string2);
+}
+
+inline int strncasecmp(const char* string1, const char* string2, size_t count) {
+  return ::strncasecmp(string1, string2, count);
+}
+
+inline int vsnprintf(char* buffer, size_t size, const char* format,
+                     va_list arguments) {
+  return ::vsnprintf(buffer, size, format, arguments);
+}
+
+inline int vswprintf(wchar_t* buffer, size_t size, const wchar_t* format,
+                     va_list arguments) {
+  DCHECK(IsWprintfFormatPortable(format));
+  return ::vswprintf(buffer, size, format, arguments);
+}
+
+}  // namespace base
+
+#endif  // BASE_STRING_UTIL_POSIX_H_
diff --git a/ipc/chromium/src/base/string_util_win.h b/ipc/chromium/src/base/string_util_win.h
new file mode 100644
index 0000000000..7f8586889b
--- /dev/null
+++ b/ipc/chromium/src/base/string_util_win.h
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_STRING_UTIL_WIN_H_
+#define BASE_STRING_UTIL_WIN_H_
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+
+#include "base/logging.h"
+
+namespace base {
+
+// Chromium code style is to not use malloc'd strings; this is only for use
+// for interaction with APIs that require it.
+inline char* strdup(const char* str) { return _strdup(str); }
+
+inline int vsnprintf(char* buffer, size_t size, const char* format,
+                     va_list arguments) {
+  int length = vsnprintf_s(buffer, size, size - 1, format, arguments);
+  if (length < 0) return _vscprintf(format, arguments);
+  return length;
+}
+
+inline int vswprintf(wchar_t* buffer, size_t size, const wchar_t* format,
+                     va_list arguments) {
+  DCHECK(IsWprintfFormatPortable(format));
+
+  int length = _vsnwprintf_s(buffer, size, size - 1, format, arguments);
+  if (length < 0) return _vscwprintf(format, arguments);
+  return length;
+}
+
+}  // namespace base
+
+#endif  // BASE_STRING_UTIL_WIN_H_
diff --git a/ipc/chromium/src/base/sys_string_conversions.h b/ipc/chromium/src/base/sys_string_conversions.h
new file mode 100644
index 0000000000..e3a51964a7
--- /dev/null
+++ b/ipc/chromium/src/base/sys_string_conversions.h
@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_SYS_STRING_CONVERSIONS_H_
+#define BASE_SYS_STRING_CONVERSIONS_H_
+
+// Provides system-dependent string type conversions for cases where it's
+// necessary to not use ICU. Generally, you should not need this in Chrome,
+// but it is used in some shared code. Dependencies should be minimal.
+
+#include <string>
+#include "base/basictypes.h"
+#include "base/string16.h"
+
+class StringPiece;
+
+namespace base {
+
+// Converts between wide and UTF-8 representations of a string. On error, the
+// result is system-dependent.
+std::string SysWideToUTF8(const std::wstring& wide);
+std::wstring SysUTF8ToWide(const StringPiece& utf8);
+
+// Converts between wide and the system multi-byte representations of a string.
+// DANGER: This will lose information and can change (on Windows, this can
+// change between reboots).
+std::string SysWideToNativeMB(const std::wstring& wide);
+std::wstring SysNativeMBToWide(const StringPiece& native_mb);
+
+}  // namespace base
+
+#endif  // BASE_SYS_STRING_CONVERSIONS_H_
diff --git a/ipc/chromium/src/base/sys_string_conversions_mac.mm b/ipc/chromium/src/base/sys_string_conversions_mac.mm
new file mode 100644
index 0000000000..664cec957b
--- /dev/null
+++ b/ipc/chromium/src/base/sys_string_conversions_mac.mm
@@ -0,0 +1,119 @@
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/sys_string_conversions.h"
+
+#import <Foundation/Foundation.h>
+
+#include <vector>
+
+#include "base/scoped_cftyperef.h"
+#include "base/string_piece.h"
+
+namespace base {
+
+namespace {
+
+// Convert the supplied CFString into the specified encoding, and return it as
+// an STL string of the template type.  Returns an empty string on failure.
+//
+// Do not assert in this function since it is used by the asssertion code!
+template <typename StringType>
+static StringType CFStringToSTLStringWithEncodingT(CFStringRef cfstring,
+                                                   CFStringEncoding encoding) {
+  CFIndex length = CFStringGetLength(cfstring);
+  if (length == 0) return StringType();
+
+  CFRange whole_string = CFRangeMake(0, length);
+  CFIndex out_size;
+  CFIndex converted = CFStringGetBytes(cfstring, whole_string, encoding,
+                                       0,      // lossByte
+                                       false,  // isExternalRepresentation
+                                       NULL,   // buffer
+                                       0,      // maxBufLen
+                                       &out_size);
+  if (converted == 0 || out_size == 0) return StringType();
+
+  // out_size is the number of UInt8-sized units needed in the destination.
+  // A buffer allocated as UInt8 units might not be properly aligned to
+  // contain elements of StringType::value_type.  Use a container for the
+  // proper value_type, and convert out_size by figuring the number of
+  // value_type elements per UInt8.  Leave room for a NUL terminator.
+  typename StringType::size_type elements =
+      out_size * sizeof(UInt8) / sizeof(typename StringType::value_type) + 1;
+
+  std::vector<typename StringType::value_type> out_buffer(elements);
+  converted = CFStringGetBytes(cfstring, whole_string, encoding,
+                               0,      // lossByte
+                               false,  // isExternalRepresentation
+                               reinterpret_cast<UInt8*>(&out_buffer[0]), out_size,
+                               NULL);  // usedBufLen
+  if (converted == 0) return StringType();
+
+  out_buffer[elements - 1] = '\0';
+  return StringType(&out_buffer[0], elements - 1);
+}
+
+// Given an STL string |in| with an encoding specified by |in_encoding|,
+// convert it to |out_encoding| and return it as an STL string of the
+// |OutStringType| template type.  Returns an empty string on failure.
+//
+// Do not assert in this function since it is used by the asssertion code!
+template <typename InStringType, typename OutStringType>
+static OutStringType STLStringToSTLStringWithEncodingsT(const InStringType& in,
+                                                        CFStringEncoding in_encoding,
+                                                        CFStringEncoding out_encoding) {
+  typename InStringType::size_type in_length = in.length();
+  if (in_length == 0) return OutStringType();
+
+  scoped_cftyperef<CFStringRef> cfstring(CFStringCreateWithBytesNoCopy(
+      NULL, reinterpret_cast<const UInt8*>(in.data()),
+      in_length * sizeof(typename InStringType::value_type), in_encoding, false, kCFAllocatorNull));
+  if (!cfstring) return OutStringType();
+
+  return CFStringToSTLStringWithEncodingT<OutStringType>(cfstring, out_encoding);
+}
+
+// Given an STL string |in| with an encoding specified by |in_encoding|,
+// return it as a CFStringRef.  Returns NULL on failure.
+template <typename StringType>
+static CFStringRef STLStringToCFStringWithEncodingsT(const StringType& in,
+                                                     CFStringEncoding in_encoding) {
+  typename StringType::size_type in_length = in.length();
+  if (in_length == 0) return CFSTR("");
+
+  return CFStringCreateWithBytes(kCFAllocatorDefault, reinterpret_cast<const UInt8*>(in.data()),
+                                 in_length * sizeof(typename StringType::value_type), in_encoding,
+                                 false);
+}
+
+// Specify the byte ordering explicitly, otherwise CFString will be confused
+// when strings don't carry BOMs, as they typically won't.
+static const CFStringEncoding kNarrowStringEncoding = kCFStringEncodingUTF8;
+
+#ifdef __BIG_ENDIAN__
+static const CFStringEncoding kWideStringEncoding = kCFStringEncodingUTF32BE;
+#elif defined(__LITTLE_ENDIAN__)
+static const CFStringEncoding kWideStringEncoding = kCFStringEncodingUTF32LE;
+#endif  // __LITTLE_ENDIAN__
+
+}  // namespace
+
+// Do not assert in this function since it is used by the asssertion code!
+std::string SysWideToUTF8(const std::wstring& wide) {
+  return STLStringToSTLStringWithEncodingsT<std::wstring, std::string>(wide, kWideStringEncoding,
+                                                                       kNarrowStringEncoding);
+}
+
+// Do not assert in this function since it is used by the asssertion code!
+std::wstring SysUTF8ToWide(const StringPiece& utf8) {
+  return STLStringToSTLStringWithEncodingsT<StringPiece, std::wstring>(utf8, kNarrowStringEncoding,
+                                                                       kWideStringEncoding);
+}
+
+std::string SysWideToNativeMB(const std::wstring& wide) { return SysWideToUTF8(wide); }
+
+std::wstring SysNativeMBToWide(const StringPiece& native_mb) { return SysUTF8ToWide(native_mb); }
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/sys_string_conversions_win.cc b/ipc/chromium/src/base/sys_string_conversions_win.cc
new file mode 100644
index 0000000000..148685ca7e
--- /dev/null
+++ b/ipc/chromium/src/base/sys_string_conversions_win.cc
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/sys_string_conversions.h"
+
+#include <windows.h>
+
+#include "base/string_piece.h"
+
+namespace base {
+
+// Do not assert in this function since it is used by the asssertion code!
+std::wstring SysMultiByteToWide(const StringPiece& mb, uint32_t code_page) {
+  if (mb.empty()) return std::wstring();
+
+  int mb_length = static_cast<int>(mb.length());
+  // Compute the length of the buffer.
+  int charcount =
+      MultiByteToWideChar(code_page, 0, mb.data(), mb_length, NULL, 0);
+  if (charcount == 0) return std::wstring();
+
+  std::wstring wide;
+  wide.resize(charcount);
+  MultiByteToWideChar(code_page, 0, mb.data(), mb_length, &wide[0], charcount);
+
+  return wide;
+}
+
+// Do not assert in this function since it is used by the asssertion code!
+std::string SysWideToMultiByte(const std::wstring& wide, uint32_t code_page) {
+  int wide_length = static_cast<int>(wide.length());
+  if (wide_length == 0) return std::string();
+
+  // Compute the length of the buffer we'll need.
+  int charcount = WideCharToMultiByte(code_page, 0, wide.data(), wide_length,
+                                      NULL, 0, NULL, NULL);
+  if (charcount == 0) return std::string();
+
+  std::string mb;
+  mb.resize(charcount);
+  WideCharToMultiByte(code_page, 0, wide.data(), wide_length, &mb[0], charcount,
+                      NULL, NULL);
+
+  return mb;
+}
+
+// Do not assert in this function since it is used by the asssertion code!
+std::string SysWideToUTF8(const std::wstring& wide) {
+  return SysWideToMultiByte(wide, CP_UTF8);
+}
+
+// Do not assert in this function since it is used by the asssertion code!
+std::wstring SysUTF8ToWide(const StringPiece& utf8) {
+  return SysMultiByteToWide(utf8, CP_UTF8);
+}
+
+std::string SysWideToNativeMB(const std::wstring& wide) {
+  return SysWideToMultiByte(wide, CP_ACP);
+}
+
+std::wstring SysNativeMBToWide(const StringPiece& native_mb) {
+  return SysMultiByteToWide(native_mb, CP_ACP);
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/task.h b/ipc/chromium/src/base/task.h
new file mode 100644
index 0000000000..842fa8487f
--- /dev/null
+++ b/ipc/chromium/src/base/task.h
@@ -0,0 +1,356 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_TASK_H_
+#define BASE_TASK_H_
+
+#include "base/revocable_store.h"
+#include "base/tuple.h"
+
+#include "nsISupportsImpl.h"
+#include "nsThreadUtils.h"
+
+#include <type_traits>
+#include <utility>
+
+// Helper functions so that we can call a function a pass it arguments that come
+// from a Tuple.
+
+namespace details {
+
+// Call the given method on the given object. Arguments are passed by move
+// semantics from the given tuple. If the tuple has length N, the sequence must
+// be IndexSequence<0, 1, ..., N-1>.
+template <size_t... Indices, class ObjT, class Method, typename... Args>
+void CallMethod(std::index_sequence<Indices...>, ObjT* obj, Method method,
+                std::tuple<Args...>& arg) {
+  (obj->*method)(std::move(std::get<Indices>(arg))...);
+}
+
+// Same as above, but call a function.
+template <size_t... Indices, typename Function, typename... Args>
+void CallFunction(std::index_sequence<Indices...>, Function function,
+                  std::tuple<Args...>& arg) {
+  (*function)(std::move(std::get<Indices>(arg))...);
+}
+
+}  // namespace details
+
+// Call a method on the given object. Arguments are passed by move semantics
+// from the given tuple.
+template <class ObjT, class Method, typename... Args>
+void DispatchTupleToMethod(ObjT* obj, Method method, std::tuple<Args...>& arg) {
+  details::CallMethod(std::index_sequence_for<Args...>{}, obj, method, arg);
+}
+
+// Same as above, but call a function.
+template <typename Function, typename... Args>
+void DispatchTupleToFunction(Function function, std::tuple<Args...>& arg) {
+  details::CallFunction(std::index_sequence_for<Args...>{}, function, arg);
+}
+
+// Scoped Factories ------------------------------------------------------------
+//
+// These scoped factory objects can be used by non-refcounted objects to safely
+// place tasks in a message loop.  Each factory guarantees that the tasks it
+// produces will not run after the factory is destroyed.  Commonly, factories
+// are declared as class members, so the class' tasks will automatically cancel
+// when the class instance is destroyed.
+//
+// Exampe Usage:
+//
+// class MyClass {
+//  private:
+//   // This factory will be used to schedule invocations of SomeMethod.
+//   ScopedRunnableMethodFactory<MyClass> some_method_factory_;
+//
+//  public:
+//   // It is safe to suppress warning 4355 here.
+//   MyClass() : some_method_factory_(this) { }
+//
+//   void SomeMethod() {
+//     // If this function might be called directly, you might want to revoke
+//     // any outstanding runnable methods scheduled to call it.  If it's not
+//     // referenced other than by the factory, this is unnecessary.
+//     some_method_factory_.RevokeAll();
+//     ...
+//   }
+//
+//   void ScheduleSomeMethod() {
+//     // If you'd like to only only have one pending task at a time, test for
+//     // |empty| before manufacturing another task.
+//     if (!some_method_factory_.empty())
+//       return;
+//
+//     // The factories are not thread safe, so always invoke on
+//     // |MessageLoop::current()|.
+//     MessageLoop::current()->PostDelayedTask(
+//         some_method_factory_.NewRunnableMethod(&MyClass::SomeMethod),
+//         kSomeMethodDelayMS);
+//   }
+// };
+
+// A ScopedTaskFactory produces tasks of type |TaskType| and prevents them from
+// running after it is destroyed.
+template <class TaskType>
+class ScopedTaskFactory : public RevocableStore {
+ public:
+  ScopedTaskFactory() {}
+
+  // Create a new task.
+  inline TaskType* NewTask() { return new TaskWrapper(this); }
+
+  class TaskWrapper : public TaskType {
+   public:
+    explicit TaskWrapper(RevocableStore* store) : revocable_(store) {}
+
+    NS_IMETHOD Run() override {
+      if (!revocable_.revoked()) TaskType::Run();
+      return NS_OK;
+    }
+
+    ~TaskWrapper() { NS_ASSERT_OWNINGTHREAD(TaskWrapper); }
+
+   private:
+    Revocable revocable_;
+
+    NS_DECL_OWNINGTHREAD
+
+    DISALLOW_EVIL_CONSTRUCTORS(TaskWrapper);
+  };
+
+ private:
+  DISALLOW_EVIL_CONSTRUCTORS(ScopedTaskFactory);
+};
+
+// A ScopedRunnableMethodFactory creates runnable methods for a specified
+// object.  This is particularly useful for generating callbacks for
+// non-reference counted objects when the factory is a member of the object.
+template <class T>
+class ScopedRunnableMethodFactory : public RevocableStore {
+ public:
+  explicit ScopedRunnableMethodFactory(T* object) : object_(object) {}
+
+  template <class Method, typename... Elements>
+  inline already_AddRefed<mozilla::Runnable> NewRunnableMethod(
+      Method method, Elements&&... elements) {
+    typedef std::tuple<std::decay_t<Elements>...> ArgsTuple;
+    typedef RunnableMethod<Method, ArgsTuple> Runnable;
+    typedef typename ScopedTaskFactory<Runnable>::TaskWrapper TaskWrapper;
+
+    RefPtr<TaskWrapper> task = new TaskWrapper(this);
+    task->Init(object_, method,
+               std::make_tuple(std::forward<Elements>(elements)...));
+    return task.forget();
+  }
+
+ protected:
+  template <class Method, class Params>
+  class RunnableMethod : public mozilla::Runnable {
+   public:
+    RunnableMethod()
+        : mozilla::Runnable("ScopedRunnableMethodFactory::RunnableMethod") {}
+
+    void Init(T* obj, Method meth, Params&& params) {
+      obj_ = obj;
+      meth_ = meth;
+      params_ = std::forward<Params>(params);
+    }
+
+    NS_IMETHOD Run() override {
+      DispatchTupleToMethod(obj_, meth_, params_);
+      return NS_OK;
+    }
+
+   private:
+    T* MOZ_UNSAFE_REF(
+        "The validity of this pointer must be enforced by "
+        "external factors.") obj_;
+    Method meth_;
+    Params params_;
+
+    DISALLOW_EVIL_CONSTRUCTORS(RunnableMethod);
+  };
+
+ private:
+  T* object_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(ScopedRunnableMethodFactory);
+};
+
+// General task implementations ------------------------------------------------
+
+// Task to delete an object
+template <class T>
+class DeleteTask : public mozilla::CancelableRunnable {
+ public:
+  explicit DeleteTask(T* obj)
+      : mozilla::CancelableRunnable("DeleteTask"), obj_(obj) {}
+  NS_IMETHOD Run() override {
+    delete obj_;
+    return NS_OK;
+  }
+  virtual nsresult Cancel() override {
+    obj_ = NULL;
+    return NS_OK;
+  }
+
+ private:
+  T* MOZ_UNSAFE_REF(
+      "The validity of this pointer must be enforced by "
+      "external factors.") obj_;
+};
+
+// RunnableMethodTraits --------------------------------------------------------
+//
+// This traits-class is used by RunnableMethod to manage the lifetime of the
+// callee object.  By default, it is assumed that the callee supports AddRef
+// and Release methods.  A particular class can specialize this template to
+// define other lifetime management.  For example, if the callee is known to
+// live longer than the RunnableMethod object, then a RunnableMethodTraits
+// struct could be defined with empty RetainCallee and ReleaseCallee methods.
+
+template <class T>
+struct RunnableMethodTraits {
+  static void RetainCallee(T* obj) { obj->AddRef(); }
+  static void ReleaseCallee(T* obj) { obj->Release(); }
+};
+
+// This allows using the NewRunnableMethod() functions with a const pointer
+// to the callee object. See the similar support in nsRefPtr for a rationale
+// of why this is reasonable.
+template <class T>
+struct RunnableMethodTraits<const T> {
+  static void RetainCallee(const T* obj) { const_cast<T*>(obj)->AddRef(); }
+  static void ReleaseCallee(const T* obj) { const_cast<T*>(obj)->Release(); }
+};
+
+// RunnableMethod and RunnableFunction -----------------------------------------
+//
+// Runnable methods are a type of task that call a function on an object when
+// they are run. We implement both an object and a set of NewRunnableMethod and
+// NewRunnableFunction functions for convenience. These functions are
+// overloaded and will infer the template types, simplifying calling code.
+//
+// The template definitions all use the following names:
+// T                - the class type of the object you're supplying
+//                    this is not needed for the Static version of the call
+// Method/Function  - the signature of a pointer to the method or function you
+//                    want to call
+// Param            - the parameter(s) to the method, possibly packed as a Tuple
+// A                - the first parameter (if any) to the method
+// B                - the second parameter (if any) to the mathod
+//
+// Put these all together and you get an object that can call a method whose
+// signature is:
+//   R T::MyFunction([A[, B]])
+//
+// Usage:
+// PostTask(NewRunnableMethod(object, &Object::method[, a[, b]])
+// PostTask(NewRunnableFunction(&function[, a[, b]])
+
+// RunnableMethod and NewRunnableMethod implementation -------------------------
+
+template <class T, class Method, class Params>
+class RunnableMethod : public mozilla::CancelableRunnable,
+                       public RunnableMethodTraits<T> {
+ public:
+  RunnableMethod(T* obj, Method meth, Params&& params)
+      : mozilla::CancelableRunnable("RunnableMethod"),
+        obj_(obj),
+        meth_(meth),
+        params_(std::forward<Params>(params)) {
+    this->RetainCallee(obj_);
+  }
+  ~RunnableMethod() { ReleaseCallee(); }
+
+  NS_IMETHOD Run() override {
+    if (obj_) DispatchTupleToMethod(obj_, meth_, params_);
+    return NS_OK;
+  }
+
+  virtual nsresult Cancel() override {
+    ReleaseCallee();
+    return NS_OK;
+  }
+
+ private:
+  void ReleaseCallee() {
+    if (obj_) {
+      RunnableMethodTraits<T>::ReleaseCallee(obj_);
+      obj_ = nullptr;
+    }
+  }
+
+  // This is owning because of the RetainCallee and ReleaseCallee calls in the
+  // constructor and destructor.
+  T* MOZ_OWNING_REF obj_;
+  Method meth_;
+  Params params_;
+};
+
+namespace dont_add_new_uses_of_this {
+
+// Don't add new uses of this!!!!
+template <class T, class Method, typename... Args>
+inline already_AddRefed<mozilla::Runnable> NewRunnableMethod(T* object,
+                                                             Method method,
+                                                             Args&&... args) {
+  typedef std::tuple<std::decay_t<Args>...> ArgsTuple;
+  RefPtr<mozilla::Runnable> t = new RunnableMethod<T, Method, ArgsTuple>(
+      object, method, std::make_tuple(std::forward<Args>(args)...));
+  return t.forget();
+}
+
+}  // namespace dont_add_new_uses_of_this
+
+// RunnableFunction and NewRunnableFunction implementation ---------------------
+
+template <class Function, class Params>
+class RunnableFunction : public mozilla::CancelableRunnable {
+ public:
+  RunnableFunction(const char* name, Function function, Params&& params)
+      : mozilla::CancelableRunnable(name),
+        function_(function),
+        params_(std::forward<Params>(params)) {}
+
+  ~RunnableFunction() {}
+
+  NS_IMETHOD Run() override {
+    if (function_) DispatchTupleToFunction(function_, params_);
+    return NS_OK;
+  }
+
+  virtual nsresult Cancel() override {
+    function_ = nullptr;
+    return NS_OK;
+  }
+
+  Function function_;
+  Params params_;
+};
+
+template <class Function, typename... Args>
+inline already_AddRefed<mozilla::CancelableRunnable>
+NewCancelableRunnableFunction(const char* name, Function function,
+                              Args&&... args) {
+  typedef std::tuple<std::decay_t<Args>...> ArgsTuple;
+  RefPtr<mozilla::CancelableRunnable> t =
+      new RunnableFunction<Function, ArgsTuple>(
+          name, function, std::make_tuple(std::forward<Args>(args)...));
+  return t.forget();
+}
+
+template <class Function, typename... Args>
+inline already_AddRefed<mozilla::Runnable> NewRunnableFunction(
+    const char* name, Function function, Args&&... args) {
+  typedef std::tuple<std::decay_t<Args>...> ArgsTuple;
+  RefPtr<mozilla::Runnable> t = new RunnableFunction<Function, ArgsTuple>(
+      name, function, std::make_tuple(std::forward<Args>(args)...));
+  return t.forget();
+}
+
+#endif  // BASE_TASK_H_
diff --git a/ipc/chromium/src/base/thread.cc b/ipc/chromium/src/base/thread.cc
new file mode 100644
index 0000000000..3fc258af2d
--- /dev/null
+++ b/ipc/chromium/src/base/thread.cc
@@ -0,0 +1,202 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/thread.h"
+
+#include "base/string_util.h"
+#include "base/thread_local.h"
+#include "base/waitable_event.h"
+#include "GeckoProfiler.h"
+#include "mozilla/EventQueue.h"
+#include "mozilla/IOInterposer.h"
+#include "mozilla/ThreadEventQueue.h"
+#include "nsThreadUtils.h"
+#include "nsThreadManager.h"
+
+namespace base {
+
+// This task is used to trigger the message loop to exit.
+class ThreadQuitTask : public mozilla::Runnable {
+ public:
+  ThreadQuitTask() : mozilla::Runnable("ThreadQuitTask") {}
+  NS_IMETHOD Run() override {
+    MessageLoop::current()->Quit();
+    Thread::SetThreadWasQuitProperly(true);
+    return NS_OK;
+  }
+};
+
+// Used to pass data to ThreadMain.  This structure is allocated on the stack
+// from within StartWithOptions.
+struct Thread::StartupData {
+  // We get away with a const reference here because of how we are allocated.
+  const Thread::Options& options;
+
+  // Used to synchronize thread startup.
+  WaitableEvent event;
+
+  explicit StartupData(const Options& opt)
+      : options(opt), event(false, false) {}
+};
+
+Thread::Thread(const char* name)
+    : startup_data_(NULL),
+      thread_(0),
+      message_loop_(NULL),
+      thread_id_(0),
+      name_(name) {
+  MOZ_COUNT_CTOR(base::Thread);
+}
+
+Thread::~Thread() {
+  MOZ_COUNT_DTOR(base::Thread);
+  Stop();
+}
+
+namespace {
+
+// We use this thread-local variable to record whether or not a thread exited
+// because its Stop method was called.  This allows us to catch cases where
+// MessageLoop::Quit() is called directly, which is unexpected when using a
+// Thread to setup and run a MessageLoop.
+
+static base::ThreadLocalBoolean& get_tls_bool() {
+  static base::ThreadLocalBoolean tls_ptr;
+  return tls_ptr;
+}
+
+}  // namespace
+
+void Thread::SetThreadWasQuitProperly(bool flag) { get_tls_bool().Set(flag); }
+
+bool Thread::GetThreadWasQuitProperly() {
+  bool quit_properly = true;
+#ifndef NDEBUG
+  quit_properly = get_tls_bool().Get();
+#endif
+  return quit_properly;
+}
+
+bool Thread::Start() { return StartWithOptions(Options()); }
+
+bool Thread::StartWithOptions(const Options& options) {
+  DCHECK(!message_loop_);
+
+  SetThreadWasQuitProperly(false);
+
+  StartupData startup_data(options);
+  startup_data_ = &startup_data;
+
+  if (!PlatformThread::Create(options.stack_size, this, &thread_)) {
+    DLOG(ERROR) << "failed to create thread";
+    startup_data_ = NULL;  // Record that we failed to start.
+    return false;
+  }
+
+  // Wait for the thread to start and initialize message_loop_
+  startup_data.event.Wait();
+
+  DCHECK(message_loop_);
+  return true;
+}
+
+void Thread::Stop() {
+  if (!thread_was_started()) return;
+
+  // We should only be called on the same thread that started us.
+  DCHECK_NE(thread_id_, PlatformThread::CurrentId());
+
+  // StopSoon may have already been called.
+  if (message_loop_) {
+    RefPtr<ThreadQuitTask> task = new ThreadQuitTask();
+    message_loop_->PostTask(task.forget());
+  }
+
+  // Wait for the thread to exit.  It should already have terminated but make
+  // sure this assumption is valid.
+  //
+  // TODO(darin): Unfortunately, we need to keep message_loop_ around until
+  // the thread exits.  Some consumers are abusing the API.  Make them stop.
+  //
+  PlatformThread::Join(thread_);
+
+  // The thread can't receive messages anymore.
+  message_loop_ = NULL;
+
+  // The thread no longer needs to be joined.
+  startup_data_ = NULL;
+}
+
+void Thread::StopSoon() {
+  if (!message_loop_) return;
+
+  // We should only be called on the same thread that started us.
+  DCHECK_NE(thread_id_, PlatformThread::CurrentId());
+
+  // We had better have a message loop at this point!  If we do not, then it
+  // most likely means that the thread terminated unexpectedly, probably due
+  // to someone calling Quit() on our message loop directly.
+  DCHECK(message_loop_);
+
+  RefPtr<ThreadQuitTask> task = new ThreadQuitTask();
+  message_loop_->PostTask(task.forget());
+}
+
+void Thread::ThreadMain() {
+  nsCOMPtr<nsIThread> xpcomThread;
+  auto loopType = startup_data_->options.message_loop_type;
+  if (loopType == MessageLoop::TYPE_MOZILLA_NONMAINTHREAD ||
+      loopType == MessageLoop::TYPE_MOZILLA_NONMAINUITHREAD) {
+    auto queue = mozilla::MakeRefPtr<mozilla::ThreadEventQueue>(
+        mozilla::MakeUnique<mozilla::EventQueue>());
+    xpcomThread = nsThreadManager::get().CreateCurrentThread(
+        queue, nsThread::NOT_MAIN_THREAD);
+  } else {
+    xpcomThread = NS_GetCurrentThread();
+  }
+
+  AUTO_PROFILER_REGISTER_THREAD(name_.c_str());
+  mozilla::IOInterposer::RegisterCurrentThread();
+
+  // The message loop for this thread.
+  MessageLoop message_loop(startup_data_->options.message_loop_type,
+                           xpcomThread);
+
+  xpcomThread = nullptr;
+
+  // Complete the initialization of our Thread object.
+  thread_id_ = PlatformThread::CurrentId();
+  PlatformThread::SetName(name_.c_str());
+  NS_SetCurrentThreadName(name_.c_str());
+  message_loop.set_thread_name(name_);
+  message_loop.set_hang_timeouts(startup_data_->options.transient_hang_timeout,
+                                 startup_data_->options.permanent_hang_timeout);
+  message_loop_ = &message_loop;
+
+  // Let the thread do extra initialization.
+  // Let's do this before signaling we are started.
+  Init();
+
+  startup_data_->event.Signal();
+  // startup_data_ can't be touched anymore since the starting thread is now
+  // unlocked.
+
+  message_loop.Run();
+
+  // Let the thread do extra cleanup.
+  CleanUp();
+
+  // Assert that MessageLoop::Quit was called by ThreadQuitTask.
+  DCHECK(GetThreadWasQuitProperly());
+
+  mozilla::IOInterposer::UnregisterCurrentThread();
+
+  // We can't receive messages anymore.
+  message_loop_ = NULL;
+  thread_id_ = 0;
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/thread.h b/ipc/chromium/src/base/thread.h
new file mode 100644
index 0000000000..7b9a5975d3
--- /dev/null
+++ b/ipc/chromium/src/base/thread.h
@@ -0,0 +1,176 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_THREAD_H_
+#define BASE_THREAD_H_
+
+#include <stdint.h>
+#include <string>
+
+#include "base/message_loop.h"
+#include "base/platform_thread.h"
+
+namespace base {
+
+// A simple thread abstraction that establishes a MessageLoop on a new thread.
+// The consumer uses the MessageLoop of the thread to cause code to execute on
+// the thread.  When this object is destroyed the thread is terminated.  All
+// pending tasks queued on the thread's message loop will run to completion
+// before the thread is terminated.
+class Thread : PlatformThread::Delegate {
+ public:
+  struct Options {
+    // Specifies the type of message loop that will be allocated on the thread.
+    MessageLoop::Type message_loop_type;
+
+    // Specifies the maximum stack size that the thread is allowed to use.
+    // This does not necessarily correspond to the thread's initial stack size.
+    // A value of 0 indicates that the default maximum should be used.
+    size_t stack_size;
+
+    // Specifies the transient and permanent hang timeouts for background hang
+    // monitoring. A value of 0 indicates there is no timeout.
+    uint32_t transient_hang_timeout;
+    uint32_t permanent_hang_timeout;
+
+    Options()
+        : message_loop_type(MessageLoop::TYPE_DEFAULT),
+          stack_size(0),
+          transient_hang_timeout(0),
+          permanent_hang_timeout(0) {}
+    Options(MessageLoop::Type type, size_t size)
+        : message_loop_type(type),
+          stack_size(size),
+          transient_hang_timeout(0),
+          permanent_hang_timeout(0) {}
+  };
+
+  // Constructor.
+  // name is a display string to identify the thread.
+  explicit Thread(const char* name);
+
+  // Destroys the thread, stopping it if necessary.
+  //
+  // NOTE: If you are subclassing from Thread, and you wish for your CleanUp
+  // method to be called, then you need to call Stop() from your destructor.
+  //
+  virtual ~Thread();
+
+  // Starts the thread.  Returns true if the thread was successfully started;
+  // otherwise, returns false.  Upon successful return, the message_loop()
+  // getter will return non-null.
+  //
+  // Note: This function can't be called on Windows with the loader lock held;
+  // i.e. during a DllMain, global object construction or destruction, atexit()
+  // callback.
+  bool Start();
+
+  // Starts the thread. Behaves exactly like Start in addition to allow to
+  // override the default options.
+  //
+  // Note: This function can't be called on Windows with the loader lock held;
+  // i.e. during a DllMain, global object construction or destruction, atexit()
+  // callback.
+  bool StartWithOptions(const Options& options);
+
+  // Signals the thread to exit and returns once the thread has exited.  After
+  // this method returns, the Thread object is completely reset and may be used
+  // as if it were newly constructed (i.e., Start may be called again).
+  //
+  // Stop may be called multiple times and is simply ignored if the thread is
+  // already stopped.
+  //
+  // NOTE: This method is optional.  It is not strictly necessary to call this
+  // method as the Thread's destructor will take care of stopping the thread if
+  // necessary.
+  //
+  void Stop();
+
+  // Signals the thread to exit in the near future.
+  //
+  // WARNING: This function is not meant to be commonly used. Use at your own
+  // risk. Calling this function will cause message_loop() to become invalid in
+  // the near future. This function was created to workaround a specific
+  // deadlock on Windows with printer worker thread. In any other case, Stop()
+  // should be used.
+  //
+  // StopSoon should not be called multiple times as it is risky to do so. It
+  // could cause a timing issue in message_loop() access. Call Stop() to reset
+  // the thread object once it is known that the thread has quit.
+  void StopSoon();
+
+  // Returns the message loop for this thread.  Use the MessageLoop's
+  // PostTask methods to execute code on the thread.  This only returns
+  // non-null after a successful call to Start.  After Stop has been called,
+  // this will return NULL.
+  //
+  // NOTE: You must not call this MessageLoop's Quit method directly.  Use
+  // the Thread's Stop method instead.
+  //
+  MessageLoop* message_loop() const { return message_loop_; }
+
+  // Set the name of this thread (for display in debugger too).
+  const std::string& thread_name() { return name_; }
+
+  // The native thread handle.
+  PlatformThreadHandle thread_handle() { return thread_; }
+
+  // The thread ID.
+  PlatformThreadId thread_id() const { return thread_id_; }
+
+  // Reset thread ID as current thread.
+  PlatformThreadId reset_thread_id() {
+    thread_id_ = PlatformThread::CurrentId();
+    return thread_id_;
+  }
+
+  // Returns true if the thread has been started, and not yet stopped.
+  // When a thread is running, the thread_id_ is non-zero.
+  bool IsRunning() const { return thread_id_ != 0; }
+
+ protected:
+  // Called just prior to starting the message loop
+  virtual void Init() {}
+
+  // Called just after the message loop ends
+  virtual void CleanUp() {}
+
+  static void SetThreadWasQuitProperly(bool flag);
+  static bool GetThreadWasQuitProperly();
+
+ private:
+  // PlatformThread::Delegate methods:
+  virtual void ThreadMain() override;
+
+  // We piggy-back on the startup_data_ member to know if we successfully
+  // started the thread.  This way we know that we need to call Join.
+  bool thread_was_started() const { return startup_data_ != NULL; }
+
+  // Used to pass data to ThreadMain.
+  struct StartupData;
+  StartupData* startup_data_;
+
+  // The thread's handle.
+  PlatformThreadHandle thread_;
+
+  // The thread's message loop.  Valid only while the thread is alive.  Set
+  // by the created thread.
+  MessageLoop* message_loop_;
+
+  // Our thread's ID.
+  PlatformThreadId thread_id_;
+
+  // The name of the thread.  Used for debugging purposes.
+  std::string name_;
+
+  friend class ThreadQuitTask;
+
+  DISALLOW_COPY_AND_ASSIGN(Thread);
+};
+
+}  // namespace base
+
+#endif  // BASE_THREAD_H_
diff --git a/ipc/chromium/src/base/thread_local.h b/ipc/chromium/src/base/thread_local.h
new file mode 100644
index 0000000000..15401f3c94
--- /dev/null
+++ b/ipc/chromium/src/base/thread_local.h
@@ -0,0 +1,121 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// WARNING: Thread local storage is a bit tricky to get right.  Please make
+// sure that this is really the proper solution for what you're trying to
+// achieve.  Don't prematurely optimize, most likely you can just use a Lock.
+//
+// These classes implement a warpper around the platform's TLS storage
+// mechanism.  On construction, they will allocate a TLS slot, and free the
+// TLS slot on destruction.  No memory management (creation or destruction) is
+// handled.  This means for uses of ThreadLocalPointer, you must correctly
+// manage the memory yourself, these classes will not destroy the pointer for
+// you.  There are no at-thread-exit actions taken by these classes.
+//
+// ThreadLocalPointer<Type> wraps a Type*.  It performs no creation or
+// destruction, so memory management must be handled elsewhere.  The first call
+// to Get() on a thread will return NULL.  You can update the pointer with a
+// call to Set().
+//
+// ThreadLocalBoolean wraps a bool.  It will default to false if it has never
+// been set otherwise with Set().
+//
+// Thread Safety:  An instance of ThreadLocalStorage is completely thread safe
+// once it has been created.  If you want to dynamically create an instance,
+// you must of course properly deal with safety and race conditions.  This
+// means a function-level static initializer is generally inappropiate.
+//
+// Example usage:
+//   // My class is logically attached to a single thread.  We cache a pointer
+//   // on the thread it was created on, so we can implement current().
+//   MyClass::MyClass() {
+//     DCHECK(Singleton<ThreadLocalPointer<MyClass> >::get()->Get() == NULL);
+//     Singleton<ThreadLocalPointer<MyClass> >::get()->Set(this);
+//   }
+//
+//   MyClass::~MyClass() {
+//     DCHECK(Singleton<ThreadLocalPointer<MyClass> >::get()->Get() != NULL);
+//     Singleton<ThreadLocalPointer<MyClass> >::get()->Set(NULL);
+//   }
+//
+//   // Return the current MyClass associated with the calling thread, can be
+//   // NULL if there isn't a MyClass associated.
+//   MyClass* MyClass::current() {
+//     return Singleton<ThreadLocalPointer<MyClass> >::get()->Get();
+//   }
+
+#ifndef BASE_THREAD_LOCAL_H_
+#define BASE_THREAD_LOCAL_H_
+
+#include "base/basictypes.h"
+
+#if defined(OS_WIN)
+#  include <windows.h>
+#elif defined(OS_POSIX)
+#  include <pthread.h>
+#endif
+
+namespace base {
+
+// Helper functions that abstract the cross-platform APIs.  Do not use directly.
+struct ThreadLocalPlatform {
+#if defined(OS_WIN)
+  typedef DWORD SlotType;
+#elif defined(OS_POSIX)
+  typedef pthread_key_t SlotType;
+#endif
+
+  static void AllocateSlot(SlotType& slot);
+  static void FreeSlot(SlotType& slot);
+  static void* GetValueFromSlot(SlotType& slot);
+  static void SetValueInSlot(SlotType& slot, void* value);
+};
+
+template <typename Type>
+class ThreadLocalPointer {
+ public:
+  ThreadLocalPointer() : slot_() { ThreadLocalPlatform::AllocateSlot(slot_); }
+
+  ThreadLocalPointer(const ThreadLocalPointer&) = delete;
+  ThreadLocalPointer& operator=(const ThreadLocalPointer&) = delete;
+
+  ~ThreadLocalPointer() { ThreadLocalPlatform::FreeSlot(slot_); }
+
+  Type* Get() {
+    return static_cast<Type*>(ThreadLocalPlatform::GetValueFromSlot(slot_));
+  }
+
+  void Set(Type* ptr) { ThreadLocalPlatform::SetValueInSlot(slot_, ptr); }
+
+ private:
+  typedef ThreadLocalPlatform::SlotType SlotType;
+
+  SlotType slot_;
+};
+
+class ThreadLocalBoolean {
+ public:
+  ThreadLocalBoolean() {}
+
+  ThreadLocalBoolean(const ThreadLocalBoolean&) = delete;
+  ThreadLocalBoolean& operator=(const ThreadLocalBoolean&) = delete;
+
+  ~ThreadLocalBoolean() {}
+
+  bool Get() { return tlp_.Get() != NULL; }
+
+  void Set(bool val) {
+    uintptr_t intVal = val ? 1 : 0;
+    tlp_.Set(reinterpret_cast<void*>(intVal));
+  }
+
+ private:
+  ThreadLocalPointer<void> tlp_;
+};
+
+}  // namespace base
+
+#endif  // BASE_THREAD_LOCAL_H_
diff --git a/ipc/chromium/src/base/thread_local_posix.cc b/ipc/chromium/src/base/thread_local_posix.cc
new file mode 100644
index 0000000000..050a6e4b92
--- /dev/null
+++ b/ipc/chromium/src/base/thread_local_posix.cc
@@ -0,0 +1,38 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/thread_local.h"
+
+#include <pthread.h>
+
+#include "base/logging.h"
+
+namespace base {
+
+// static
+void ThreadLocalPlatform::AllocateSlot(SlotType& slot) {
+  int error = pthread_key_create(&slot, NULL);
+  CHECK(error == 0);
+}
+
+// static
+void ThreadLocalPlatform::FreeSlot(SlotType& slot) {
+  int error = pthread_key_delete(slot);
+  DCHECK(error == 0);
+}
+
+// static
+void* ThreadLocalPlatform::GetValueFromSlot(SlotType& slot) {
+  return pthread_getspecific(slot);
+}
+
+// static
+void ThreadLocalPlatform::SetValueInSlot(SlotType& slot, void* value) {
+  int error = pthread_setspecific(slot, value);
+  CHECK(error == 0);
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/thread_local_storage.h b/ipc/chromium/src/base/thread_local_storage.h
new file mode 100644
index 0000000000..cf488a2d8d
--- /dev/null
+++ b/ipc/chromium/src/base/thread_local_storage.h
@@ -0,0 +1,95 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_THREAD_LOCAL_STORAGE_H_
+#define BASE_THREAD_LOCAL_STORAGE_H_
+
+#include "base/basictypes.h"
+
+#if defined(OS_POSIX)
+#  include <pthread.h>
+#endif
+
+// Wrapper for thread local storage.  This class doesn't do much except provide
+// an API for portability.
+class ThreadLocalStorage {
+ public:
+  // Prototype for the TLS destructor function, which can be optionally used to
+  // cleanup thread local storage on thread exit.  'value' is the data that is
+  // stored in thread local storage.
+  typedef void (*TLSDestructorFunc)(void* value);
+
+  // A key representing one value stored in TLS.
+  class Slot {
+   public:
+    explicit Slot(TLSDestructorFunc destructor = NULL);
+
+    // This constructor should be used for statics.
+    // It returns an uninitialized Slot.
+    explicit Slot(base::LinkerInitialized x) {}
+
+    // Set up the TLS slot.  Called by the constructor.
+    // 'destructor' is a pointer to a function to perform per-thread cleanup of
+    // this object.  If set to NULL, no cleanup is done for this TLS slot.
+    // Returns false on error.
+    bool Initialize(TLSDestructorFunc destructor);
+
+    // Free a previously allocated TLS 'slot'.
+    // If a destructor was set for this slot, removes
+    // the destructor so that remaining threads exiting
+    // will not free data.
+    void Free();
+
+    // Get the thread-local value stored in slot 'slot'.
+    // Values are guaranteed to initially be zero.
+    void* Get() const;
+
+    // Set the thread-local value stored in slot 'slot' to
+    // value 'value'.
+    void Set(void* value);
+
+    bool initialized() const { return initialized_; }
+
+   private:
+    // The internals of this struct should be considered private.
+    bool initialized_;
+#if defined(OS_WIN)
+    int slot_;
+#elif defined(OS_POSIX)
+    pthread_key_t key_;
+#endif
+
+    DISALLOW_COPY_AND_ASSIGN(Slot);
+  };
+
+#if defined(OS_WIN)
+  // Function called when on thread exit to call TLS
+  // destructor functions.  This function is used internally.
+  static void ThreadExit();
+
+ private:
+  // Function to lazily initialize our thread local storage.
+  static void** Initialize();
+
+ private:
+  // The maximum number of 'slots' in our thread local storage stack.
+  // For now, this is fixed.  We could either increase statically, or
+  // we could make it dynamic in the future.
+  static const int kThreadLocalStorageSize = 64;
+
+  static long tls_key_;
+  static long tls_max_;
+  static TLSDestructorFunc tls_destructors_[kThreadLocalStorageSize];
+#endif  // OS_WIN
+
+  DISALLOW_COPY_AND_ASSIGN(ThreadLocalStorage);
+};
+
+// Temporary backwards-compatible name.
+// TODO(evanm): replace all usage of TLSSlot.
+typedef ThreadLocalStorage::Slot TLSSlot;
+
+#endif  // BASE_THREAD_LOCAL_STORAGE_H_
diff --git a/ipc/chromium/src/base/thread_local_win.cc b/ipc/chromium/src/base/thread_local_win.cc
new file mode 100644
index 0000000000..2eb68e63b3
--- /dev/null
+++ b/ipc/chromium/src/base/thread_local_win.cc
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/thread_local.h"
+
+#include <windows.h>
+
+#include "base/logging.h"
+
+namespace base {
+
+// static
+void ThreadLocalPlatform::AllocateSlot(SlotType& slot) {
+  slot = TlsAlloc();
+  CHECK(slot != TLS_OUT_OF_INDEXES);
+}
+
+// static
+void ThreadLocalPlatform::FreeSlot(SlotType& slot) {
+  if (!TlsFree(slot)) {
+    NOTREACHED() << "Failed to deallocate tls slot with TlsFree().";
+  }
+}
+
+// static
+void* ThreadLocalPlatform::GetValueFromSlot(SlotType& slot) {
+  return TlsGetValue(slot);
+}
+
+// static
+void ThreadLocalPlatform::SetValueInSlot(SlotType& slot, void* value) {
+  if (!TlsSetValue(slot, value)) {
+    CHECK(false)
+    << "Failed to TlsSetValue().";
+  }
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/time.cc b/ipc/chromium/src/base/time.cc
new file mode 100644
index 0000000000..2d76878005
--- /dev/null
+++ b/ipc/chromium/src/base/time.cc
@@ -0,0 +1,97 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/time.h"
+#include "base/string_util.h"
+#include "base/sys_string_conversions.h"
+#include "prtime.h"
+
+#include "base/logging.h"
+
+namespace base {
+
+// TimeDelta ------------------------------------------------------------------
+
+int TimeDelta::InDays() const {
+  return static_cast<int>(delta_ / Time::kMicrosecondsPerDay);
+}
+
+int TimeDelta::InHours() const {
+  return static_cast<int>(delta_ / Time::kMicrosecondsPerHour);
+}
+
+int TimeDelta::InMinutes() const {
+  return static_cast<int>(delta_ / Time::kMicrosecondsPerMinute);
+}
+
+double TimeDelta::InSecondsF() const {
+  return static_cast<double>(delta_) / Time::kMicrosecondsPerSecond;
+}
+
+int64_t TimeDelta::InSeconds() const {
+  return delta_ / Time::kMicrosecondsPerSecond;
+}
+
+double TimeDelta::InMillisecondsF() const {
+  return static_cast<double>(delta_) / Time::kMicrosecondsPerMillisecond;
+}
+
+int64_t TimeDelta::InMilliseconds() const {
+  return delta_ / Time::kMicrosecondsPerMillisecond;
+}
+
+int64_t TimeDelta::InMicroseconds() const { return delta_; }
+
+// Time -----------------------------------------------------------------------
+
+// static
+Time Time::FromTimeT(time_t tt) {
+  if (tt == 0) return Time();  // Preserve 0 so we can tell it doesn't exist.
+  return Time((tt * kMicrosecondsPerSecond) + kTimeTToMicrosecondsOffset);
+}
+
+time_t Time::ToTimeT() const {
+  if (us_ == 0) return 0;  // Preserve 0 so we can tell it doesn't exist.
+  return (us_ - kTimeTToMicrosecondsOffset) / kMicrosecondsPerSecond;
+}
+
+// static
+Time Time::FromDoubleT(double dt) {
+  return Time((dt * static_cast<double>(kMicrosecondsPerSecond)) +
+              kTimeTToMicrosecondsOffset);
+}
+
+double Time::ToDoubleT() const {
+  if (us_ == 0) return 0;  // Preserve 0 so we can tell it doesn't exist.
+  return (static_cast<double>(us_ - kTimeTToMicrosecondsOffset) /
+          static_cast<double>(kMicrosecondsPerSecond));
+}
+
+Time Time::LocalMidnight() const {
+  Exploded exploded;
+  LocalExplode(&exploded);
+  exploded.hour = 0;
+  exploded.minute = 0;
+  exploded.second = 0;
+  exploded.millisecond = 0;
+  return FromLocalExploded(exploded);
+}
+
+// static
+bool Time::FromString(const wchar_t* time_string, Time* parsed_time) {
+  DCHECK((time_string != NULL) && (parsed_time != NULL));
+  std::string ascii_time_string = SysWideToUTF8(time_string);
+  if (ascii_time_string.length() == 0) return false;
+  PRTime result_time = 0;
+  PRStatus result =
+      PR_ParseTimeString(ascii_time_string.c_str(), PR_FALSE, &result_time);
+  if (PR_SUCCESS != result) return false;
+  result_time += kTimeTToMicrosecondsOffset;
+  *parsed_time = Time(result_time);
+  return true;
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/time.h b/ipc/chromium/src/base/time.h
new file mode 100644
index 0000000000..cc9bc8e30e
--- /dev/null
+++ b/ipc/chromium/src/base/time.h
@@ -0,0 +1,392 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Time represents an absolute point in time, internally represented as
+// microseconds (s/1,000,000) since a platform-dependent epoch.  Each
+// platform's epoch, along with other system-dependent clock interface
+// routines, is defined in time_PLATFORM.cc.
+//
+// TimeDelta represents a duration of time, internally represented in
+// microseconds.
+//
+// TimeTicks represents an abstract time that is always incrementing for use
+// in measuring time durations. It is internally represented in microseconds.
+// It can not be converted to a human-readable time, but is guaranteed not to
+// decrease (if the user changes the computer clock, Time::Now() may actually
+// decrease or jump).
+//
+// These classes are represented as only a 64-bit value, so they can be
+// efficiently passed by value.
+
+#ifndef BASE_TIME_H_
+#define BASE_TIME_H_
+
+#include <time.h>
+
+#include "base/basictypes.h"
+
+namespace base {
+
+class Time;
+class TimeTicks;
+
+// This unit test does a lot of manual time manipulation.
+class PageLoadTrackerUnitTest;
+
+// TimeDelta ------------------------------------------------------------------
+
+class TimeDelta {
+ public:
+  TimeDelta() : delta_(0) {}
+
+  // Converts units of time to TimeDeltas.
+  static TimeDelta FromDays(int64_t days);
+  static TimeDelta FromHours(int64_t hours);
+  static TimeDelta FromMinutes(int64_t minutes);
+  static TimeDelta FromSeconds(int64_t secs);
+  static TimeDelta FromMilliseconds(int64_t ms);
+  static TimeDelta FromMicroseconds(int64_t us);
+
+  // Returns the internal numeric value of the TimeDelta object. Please don't
+  // use this and do arithmetic on it, as it is more error prone than using the
+  // provided operators.
+  int64_t ToInternalValue() const { return delta_; }
+
+  // Returns the time delta in some unit. The F versions return a floating
+  // point value, the "regular" versions return a rounded-down value.
+  int InDays() const;
+  int InHours() const;
+  int InMinutes() const;
+  double InSecondsF() const;
+  int64_t InSeconds() const;
+  double InMillisecondsF() const;
+  int64_t InMilliseconds() const;
+  int64_t InMicroseconds() const;
+
+  TimeDelta& operator=(TimeDelta other) {
+    delta_ = other.delta_;
+    return *this;
+  }
+
+  // Computations with other deltas.
+  TimeDelta operator+(TimeDelta other) const {
+    return TimeDelta(delta_ + other.delta_);
+  }
+  TimeDelta operator-(TimeDelta other) const {
+    return TimeDelta(delta_ - other.delta_);
+  }
+
+  TimeDelta& operator+=(TimeDelta other) {
+    delta_ += other.delta_;
+    return *this;
+  }
+  TimeDelta& operator-=(TimeDelta other) {
+    delta_ -= other.delta_;
+    return *this;
+  }
+  TimeDelta operator-() const { return TimeDelta(-delta_); }
+
+  // Computations with ints, note that we only allow multiplicative operations
+  // with ints, and additive operations with other deltas.
+  TimeDelta operator*(int64_t a) const { return TimeDelta(delta_ * a); }
+  TimeDelta operator/(int64_t a) const { return TimeDelta(delta_ / a); }
+  TimeDelta& operator*=(int64_t a) {
+    delta_ *= a;
+    return *this;
+  }
+  TimeDelta& operator/=(int64_t a) {
+    delta_ /= a;
+    return *this;
+  }
+  int64_t operator/(TimeDelta a) const { return delta_ / a.delta_; }
+
+  // Defined below because it depends on the definition of the other classes.
+  Time operator+(Time t) const;
+  TimeTicks operator+(TimeTicks t) const;
+
+  // Comparison operators.
+  bool operator==(TimeDelta other) const { return delta_ == other.delta_; }
+  bool operator!=(TimeDelta other) const { return delta_ != other.delta_; }
+  bool operator<(TimeDelta other) const { return delta_ < other.delta_; }
+  bool operator<=(TimeDelta other) const { return delta_ <= other.delta_; }
+  bool operator>(TimeDelta other) const { return delta_ > other.delta_; }
+  bool operator>=(TimeDelta other) const { return delta_ >= other.delta_; }
+
+ private:
+  friend class Time;
+  friend class TimeTicks;
+  friend TimeDelta operator*(int64_t a, TimeDelta td);
+
+  // Constructs a delta given the duration in microseconds. This is private
+  // to avoid confusion by callers with an integer constructor. Use
+  // FromSeconds, FromMilliseconds, etc. instead.
+  explicit TimeDelta(int64_t delta_us) : delta_(delta_us) {}
+
+  // Delta in microseconds.
+  int64_t delta_;
+};
+
+inline TimeDelta operator*(int64_t a, TimeDelta td) {
+  return TimeDelta(a * td.delta_);
+}
+
+// Time -----------------------------------------------------------------------
+
+// Represents a wall clock time.
+class Time {
+ public:
+  static const int64_t kMillisecondsPerSecond = 1000;
+  static const int64_t kMicrosecondsPerMillisecond = 1000;
+  static const int64_t kMicrosecondsPerSecond =
+      kMicrosecondsPerMillisecond * kMillisecondsPerSecond;
+  static const int64_t kMicrosecondsPerMinute = kMicrosecondsPerSecond * 60;
+  static const int64_t kMicrosecondsPerHour = kMicrosecondsPerMinute * 60;
+  static const int64_t kMicrosecondsPerDay = kMicrosecondsPerHour * 24;
+  static const int64_t kMicrosecondsPerWeek = kMicrosecondsPerDay * 7;
+  static const int64_t kNanosecondsPerMicrosecond = 1000;
+  static const int64_t kNanosecondsPerSecond =
+      kNanosecondsPerMicrosecond * kMicrosecondsPerSecond;
+
+  // Represents an exploded time that can be formatted nicely. This is kind of
+  // like the Win32 SYSTEMTIME structure or the Unix "struct tm" with a few
+  // additions and changes to prevent errors.
+  struct Exploded {
+    int year;                  // Four digit year "2007"
+    signed char month;         // 1-based month (values 1 = January, etc.)
+    signed char day_of_week;   // 0-based day of week (0 = Sunday, etc.)
+    signed char day_of_month;  // 1-based day of month (1-31)
+    signed char hour;          // Hour within the current day (0-23)
+    signed char minute;        // Minute within the current hour (0-59)
+    signed char second;        // Second within the current minute (0-59 plus
+                               // leap seconds which may take it up to 60).
+    int millisecond;           // Milliseconds within the current second (0-999)
+  };
+
+  // Contains the NULL time. Use Time::Now() to get the current time.
+  explicit Time() : us_(0) {}
+
+  // Returns true if the time object has not been initialized.
+  bool is_null() const { return us_ == 0; }
+
+  // Returns the current time. Watch out, the system might adjust its clock
+  // in which case time will actually go backwards. We don't guarantee that
+  // times are increasing, or that two calls to Now() won't be the same.
+  static Time Now();
+
+  // Returns the current time. Same as Now() except that this function always
+  // uses system time so that there are no discrepancies between the returned
+  // time and system time even on virtual environments including our test bot.
+  // For timing sensitive unittests, this function should be used.
+  static Time NowFromSystemTime();
+
+  // Converts to/from time_t in UTC and a Time class.
+  // TODO(brettw) this should be removed once everybody starts using the |Time|
+  // class.
+  static Time FromTimeT(time_t tt);
+  time_t ToTimeT() const;
+
+  // Converts time to/from a double which is the number of seconds since epoch
+  // (Jan 1, 1970).  Webkit uses this format to represent time.
+  static Time FromDoubleT(double dt);
+  double ToDoubleT() const;
+
+  // Converts an exploded structure representing either the local time or UTC
+  // into a Time class.
+  static Time FromUTCExploded(const Exploded& exploded) {
+    return FromExploded(false, exploded);
+  }
+  static Time FromLocalExploded(const Exploded& exploded) {
+    return FromExploded(true, exploded);
+  }
+
+  // Converts an integer value representing Time to a class. This is used
+  // when deserializing a |Time| structure, using a value known to be
+  // compatible. It is not provided as a constructor because the integer type
+  // may be unclear from the perspective of a caller.
+  static Time FromInternalValue(int64_t us) { return Time(us); }
+
+  // Converts a string representation of time to a Time object.
+  // An example of a time string which is converted is as below:-
+  // "Tue, 15 Nov 1994 12:45:26 GMT". If the timezone is not specified
+  // in the input string, we assume local time.
+  // TODO(iyengar) Move the FromString/FromTimeT/ToTimeT/FromFileTime to
+  // a new time converter class.
+  static bool FromString(const wchar_t* time_string, Time* parsed_time);
+
+  // For serializing, use FromInternalValue to reconstitute. Please don't use
+  // this and do arithmetic on it, as it is more error prone than using the
+  // provided operators.
+  int64_t ToInternalValue() const { return us_; }
+
+  // Fills the given exploded structure with either the local time or UTC from
+  // this time structure (containing UTC).
+  void UTCExplode(Exploded* exploded) const { return Explode(false, exploded); }
+  void LocalExplode(Exploded* exploded) const {
+    return Explode(true, exploded);
+  }
+
+  // Rounds this time down to the nearest day in local time. It will represent
+  // midnight on that day.
+  Time LocalMidnight() const;
+
+  Time& operator=(Time other) {
+    us_ = other.us_;
+    return *this;
+  }
+
+  // Compute the difference between two times.
+  TimeDelta operator-(Time other) const { return TimeDelta(us_ - other.us_); }
+
+  // Modify by some time delta.
+  Time& operator+=(TimeDelta delta) {
+    us_ += delta.delta_;
+    return *this;
+  }
+  Time& operator-=(TimeDelta delta) {
+    us_ -= delta.delta_;
+    return *this;
+  }
+
+  // Return a new time modified by some delta.
+  Time operator+(TimeDelta delta) const { return Time(us_ + delta.delta_); }
+  Time operator-(TimeDelta delta) const { return Time(us_ - delta.delta_); }
+
+  // Comparison operators
+  bool operator==(Time other) const { return us_ == other.us_; }
+  bool operator!=(Time other) const { return us_ != other.us_; }
+  bool operator<(Time other) const { return us_ < other.us_; }
+  bool operator<=(Time other) const { return us_ <= other.us_; }
+  bool operator>(Time other) const { return us_ > other.us_; }
+  bool operator>=(Time other) const { return us_ >= other.us_; }
+
+ private:
+  friend class TimeDelta;
+
+  // Explodes the given time to either local time |is_local = true| or UTC
+  // |is_local = false|.
+  void Explode(bool is_local, Exploded* exploded) const;
+
+  // Unexplodes a given time assuming the source is either local time
+  // |is_local = true| or UTC |is_local = false|.
+  static Time FromExploded(bool is_local, const Exploded& exploded);
+
+  explicit Time(int64_t us) : us_(us) {}
+
+  // The representation of Jan 1, 1970 UTC in microseconds since the
+  // platform-dependent epoch.
+  static const int64_t kTimeTToMicrosecondsOffset;
+
+  // Time in microseconds in UTC.
+  int64_t us_;
+};
+
+inline Time TimeDelta::operator+(Time t) const { return Time(t.us_ + delta_); }
+
+// Inline the TimeDelta factory methods, for fast TimeDelta construction.
+
+// static
+inline TimeDelta TimeDelta::FromDays(int64_t days) {
+  return TimeDelta(days * Time::kMicrosecondsPerDay);
+}
+
+// static
+inline TimeDelta TimeDelta::FromHours(int64_t hours) {
+  return TimeDelta(hours * Time::kMicrosecondsPerHour);
+}
+
+// static
+inline TimeDelta TimeDelta::FromMinutes(int64_t minutes) {
+  return TimeDelta(minutes * Time::kMicrosecondsPerMinute);
+}
+
+// static
+inline TimeDelta TimeDelta::FromSeconds(int64_t secs) {
+  return TimeDelta(secs * Time::kMicrosecondsPerSecond);
+}
+
+// static
+inline TimeDelta TimeDelta::FromMilliseconds(int64_t ms) {
+  return TimeDelta(ms * Time::kMicrosecondsPerMillisecond);
+}
+
+// static
+inline TimeDelta TimeDelta::FromMicroseconds(int64_t us) {
+  return TimeDelta(us);
+}
+
+// TimeTicks ------------------------------------------------------------------
+
+class TimeTicks {
+ public:
+  TimeTicks() : ticks_(0) {}
+  TimeTicks(const TimeTicks&) = default;
+
+  // Platform-dependent tick count representing "right now."
+  // The resolution of this clock is ~1-15ms.  Resolution varies depending
+  // on hardware/operating system configuration.
+  static TimeTicks Now();
+
+  // Returns true if this object has not been initialized.
+  bool is_null() const { return ticks_ == 0; }
+
+  // Returns the internal numeric value of the TimeTicks object.
+  int64_t ToInternalValue() const { return ticks_; }
+
+  TimeTicks& operator=(TimeTicks other) {
+    ticks_ = other.ticks_;
+    return *this;
+  }
+
+  // Compute the difference between two times.
+  TimeDelta operator-(TimeTicks other) const {
+    return TimeDelta(ticks_ - other.ticks_);
+  }
+
+  // Modify by some time delta.
+  TimeTicks& operator+=(TimeDelta delta) {
+    ticks_ += delta.delta_;
+    return *this;
+  }
+  TimeTicks& operator-=(TimeDelta delta) {
+    ticks_ -= delta.delta_;
+    return *this;
+  }
+
+  // Return a new TimeTicks modified by some delta.
+  TimeTicks operator+(TimeDelta delta) const {
+    return TimeTicks(ticks_ + delta.delta_);
+  }
+  TimeTicks operator-(TimeDelta delta) const {
+    return TimeTicks(ticks_ - delta.delta_);
+  }
+
+  // Comparison operators
+  bool operator==(TimeTicks other) const { return ticks_ == other.ticks_; }
+  bool operator!=(TimeTicks other) const { return ticks_ != other.ticks_; }
+  bool operator<(TimeTicks other) const { return ticks_ < other.ticks_; }
+  bool operator<=(TimeTicks other) const { return ticks_ <= other.ticks_; }
+  bool operator>(TimeTicks other) const { return ticks_ > other.ticks_; }
+  bool operator>=(TimeTicks other) const { return ticks_ >= other.ticks_; }
+
+ protected:
+  friend class TimeDelta;
+  friend class PageLoadTrackerUnitTest;
+
+  // Please use Now() to create a new object. This is for internal use
+  // and testing. Ticks is in microseconds.
+  explicit TimeTicks(int64_t ticks) : ticks_(ticks) {}
+
+  // Tick count in microseconds.
+  int64_t ticks_;
+};
+
+inline TimeTicks TimeDelta::operator+(TimeTicks t) const {
+  return TimeTicks(t.ticks_ + delta_);
+}
+
+}  // namespace base
+
+#endif  // BASE_TIME_H_
diff --git a/ipc/chromium/src/base/time_mac.cc b/ipc/chromium/src/base/time_mac.cc
new file mode 100644
index 0000000000..6ab1515601
--- /dev/null
+++ b/ipc/chromium/src/base/time_mac.cc
@@ -0,0 +1,122 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/time.h"
+
+#include <CoreFoundation/CFDate.h>
+#include <CoreFoundation/CFTimeZone.h>
+#include <mach/mach_time.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "base/scoped_cftyperef.h"
+
+namespace base {
+
+// The Time routines in this file use Mach and CoreFoundation APIs, since the
+// POSIX definition of time_t in Mac OS X wraps around after 2038--and
+// there are already cookie expiration dates, etc., past that time out in
+// the field.  Using CFDate prevents that problem, and using mach_absolute_time
+// for TimeTicks gives us nice high-resolution interval timing.
+
+// Time -----------------------------------------------------------------------
+
+// The internal representation of Time uses a 64-bit microsecond count
+// from 1970-01-01 00:00:00 UTC.  Core Foundation uses a double second count
+// since 2001-01-01 00:00:00 UTC.
+
+// Some functions in time.cc use time_t directly, so we provide a zero offset
+// for them.  The epoch is 1970-01-01 00:00:00 UTC.
+// static
+const int64_t Time::kTimeTToMicrosecondsOffset = GG_INT64_C(0);
+
+// static
+Time Time::Now() {
+  CFAbsoluteTime now =
+      CFAbsoluteTimeGetCurrent() + kCFAbsoluteTimeIntervalSince1970;
+  return Time(static_cast<int64_t>(now * kMicrosecondsPerSecond));
+}
+
+// static
+Time Time::NowFromSystemTime() {
+  // Just use Now() because Now() returns the system time.
+  return Now();
+}
+
+// static
+Time Time::FromExploded(bool is_local, const Exploded& exploded) {
+  CFGregorianDate date;
+  date.second =
+      exploded.second +
+      exploded.millisecond / static_cast<double>(kMillisecondsPerSecond);
+  date.minute = exploded.minute;
+  date.hour = exploded.hour;
+  date.day = exploded.day_of_month;
+  date.month = exploded.month;
+  date.year = exploded.year;
+
+  scoped_cftyperef<CFTimeZoneRef> time_zone(is_local ? CFTimeZoneCopySystem()
+                                                     : NULL);
+  CFAbsoluteTime seconds = CFGregorianDateGetAbsoluteTime(date, time_zone) +
+                           kCFAbsoluteTimeIntervalSince1970;
+  return Time(static_cast<int64_t>(seconds * kMicrosecondsPerSecond));
+}
+
+void Time::Explode(bool is_local, Exploded* exploded) const {
+  CFAbsoluteTime seconds = (static_cast<double>(us_) / kMicrosecondsPerSecond) -
+                           kCFAbsoluteTimeIntervalSince1970;
+
+  scoped_cftyperef<CFTimeZoneRef> time_zone(is_local ? CFTimeZoneCopySystem()
+                                                     : NULL);
+  CFGregorianDate date = CFAbsoluteTimeGetGregorianDate(seconds, time_zone);
+
+  exploded->year = date.year;
+  exploded->month = date.month;
+  exploded->day_of_month = date.day;
+  exploded->hour = date.hour;
+  exploded->minute = date.minute;
+  exploded->second = date.second;
+  exploded->millisecond =
+      static_cast<int>(date.second * kMillisecondsPerSecond) %
+      kMillisecondsPerSecond;
+}
+
+// TimeTicks ------------------------------------------------------------------
+
+// static
+TimeTicks TimeTicks::Now() {
+  uint64_t absolute_micro;
+
+  static mach_timebase_info_data_t timebase_info;
+  if (timebase_info.denom == 0) {
+    // Zero-initialization of statics guarantees that denom will be 0 before
+    // calling mach_timebase_info.  mach_timebase_info will never set denom to
+    // 0 as that would be invalid, so the zero-check can be used to determine
+    // whether mach_timebase_info has already been called.  This is
+    // recommended by Apple's QA1398.
+    kern_return_t kr = mach_timebase_info(&timebase_info);
+    DCHECK(kr == KERN_SUCCESS);
+  }
+
+  // mach_absolute_time is it when it comes to ticks on the Mac.  Other calls
+  // with less precision (such as TickCount) just call through to
+  // mach_absolute_time.
+
+  // timebase_info converts absolute time tick units into nanoseconds.  Convert
+  // to microseconds up front to stave off overflows.
+  absolute_micro = mach_absolute_time() / Time::kNanosecondsPerMicrosecond *
+                   timebase_info.numer / timebase_info.denom;
+
+  // Don't bother with the rollover handling that the Windows version does.
+  // With numer and denom = 1 (the expected case), the 64-bit absolute time
+  // reported in nanoseconds is enough to last nearly 585 years.
+
+  return TimeTicks(absolute_micro);
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/time_posix.cc b/ipc/chromium/src/base/time_posix.cc
new file mode 100644
index 0000000000..c07181ff54
--- /dev/null
+++ b/ipc/chromium/src/base/time_posix.cc
@@ -0,0 +1,200 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/time.h"
+
+#ifdef OS_MACOSX
+#  include <mach/mach_time.h>
+#endif
+#include <sys/time.h>
+#if defined(ANDROID) && !defined(__LP64__)
+#  include <time64.h>
+#else
+#  include <time.h>
+#endif
+#if defined(ANDROID) || defined(OS_POSIX)
+#  include <unistd.h>
+#endif
+
+#include <limits>
+#include <cstdint>
+
+#include "base/logging.h"
+
+namespace base {
+
+// The Time routines in this file use standard POSIX routines, or almost-
+// standard routines in the case of timegm.  We need to use a Mach-specific
+// function for TimeTicks::Now() on Mac OS X.
+
+// Time -----------------------------------------------------------------------
+
+// Some functions in time.cc use time_t directly, so we provide a zero offset
+// for them.  The epoch is 1970-01-01 00:00:00 UTC.
+// static
+const int64_t Time::kTimeTToMicrosecondsOffset = GG_INT64_C(0);
+
+// static
+Time Time::Now() {
+  struct timeval tv;
+  struct timezone tz = {0, 0};  // UTC
+  if (gettimeofday(&tv, &tz) != 0) {
+    DCHECK(0) << "Could not determine time of day";
+  }
+  // Combine seconds and microseconds in a 64-bit field containing microseconds
+  // since the epoch.  That's enough for nearly 600 centuries.
+  return Time(tv.tv_sec * kMicrosecondsPerSecond + tv.tv_usec);
+}
+
+// static
+Time Time::NowFromSystemTime() {
+  // Just use Now() because Now() returns the system time.
+  return Now();
+}
+
+// static
+Time Time::FromExploded(bool is_local, const Exploded& exploded) {
+  struct tm timestruct;
+  timestruct.tm_sec = exploded.second;
+  timestruct.tm_min = exploded.minute;
+  timestruct.tm_hour = exploded.hour;
+  timestruct.tm_mday = exploded.day_of_month;
+  timestruct.tm_mon = exploded.month - 1;
+  timestruct.tm_year = exploded.year - 1900;
+  timestruct.tm_wday = exploded.day_of_week;  // mktime/timegm ignore this
+  timestruct.tm_yday = 0;                     // mktime/timegm ignore this
+  timestruct.tm_isdst = -1;                   // attempt to figure it out
+#ifndef OS_SOLARIS
+  timestruct.tm_gmtoff = 0;   // not a POSIX field, so mktime/timegm ignore
+  timestruct.tm_zone = NULL;  // not a POSIX field, so mktime/timegm ignore
+#endif
+
+  time_t seconds;
+#ifdef ANDROID
+  seconds = mktime(&timestruct);
+#else
+  if (is_local)
+    seconds = mktime(&timestruct);
+  else
+    seconds = timegm(&timestruct);
+#endif
+
+  int64_t milliseconds;
+  // Handle overflow.  Clamping the range to what mktime and timegm might
+  // return is the best that can be done here.  It's not ideal, but it's better
+  // than failing here or ignoring the overflow case and treating each time
+  // overflow as one second prior to the epoch.
+  if (seconds == -1 && (exploded.year < 1969 || exploded.year > 1970)) {
+    // If exploded.year is 1969 or 1970, take -1 as correct, with the
+    // time indicating 1 second prior to the epoch.  (1970 is allowed to handle
+    // time zone and DST offsets.)  Otherwise, return the most future or past
+    // time representable.  Assumes the time_t epoch is 1970-01-01 00:00:00 UTC.
+    //
+    // The minimum and maximum representible times that mktime and timegm could
+    // return are used here instead of values outside that range to allow for
+    // proper round-tripping between exploded and counter-type time
+    // representations in the presence of possible truncation to time_t by
+    // division and use with other functions that accept time_t.
+    //
+    // When representing the most distant time in the future, add in an extra
+    // 999ms to avoid the time being less than any other possible value that
+    // this function can return.
+
+    // Take care to avoid overflows when time_t is int64_t.
+    if (exploded.year < 1969) {
+      int64_t min_seconds = (sizeof(time_t) < sizeof(int64_t))
+                                ? std::numeric_limits<time_t>::min()
+                                : std::numeric_limits<int32_t>::min();
+      milliseconds = min_seconds * kMillisecondsPerSecond;
+    } else {
+      int64_t max_seconds = (sizeof(time_t) < sizeof(int64_t))
+                                ? std::numeric_limits<time_t>::max()
+                                : std::numeric_limits<int32_t>::max();
+      milliseconds = max_seconds * kMillisecondsPerSecond;
+      milliseconds += kMillisecondsPerSecond - 1;
+    }
+  } else {
+    milliseconds = seconds * kMillisecondsPerSecond + exploded.millisecond;
+  }
+
+  return Time(milliseconds * kMicrosecondsPerMillisecond);
+}
+
+void Time::Explode(bool is_local, Exploded* exploded) const {
+  // Time stores times with microsecond resolution, but Exploded only carries
+  // millisecond resolution, so begin by being lossy.
+  int64_t milliseconds = us_ / kMicrosecondsPerMillisecond;
+  time_t seconds = milliseconds / kMillisecondsPerSecond;
+
+  struct tm timestruct;
+  if (is_local)
+    localtime_r(&seconds, &timestruct);
+  else
+    gmtime_r(&seconds, &timestruct);
+
+  exploded->year = timestruct.tm_year + 1900;
+  exploded->month = timestruct.tm_mon + 1;
+  exploded->day_of_week = timestruct.tm_wday;
+  exploded->day_of_month = timestruct.tm_mday;
+  exploded->hour = timestruct.tm_hour;
+  exploded->minute = timestruct.tm_min;
+  exploded->second = timestruct.tm_sec;
+  exploded->millisecond = milliseconds % kMillisecondsPerSecond;
+}
+
+// TimeTicks ------------------------------------------------------------------
+
+// static
+TimeTicks TimeTicks::Now() {
+  uint64_t absolute_micro;
+
+#if defined(OS_MACOSX)
+  static mach_timebase_info_data_t timebase_info;
+  if (timebase_info.denom == 0) {
+    // Zero-initialization of statics guarantees that denom will be 0 before
+    // calling mach_timebase_info.  mach_timebase_info will never set denom to
+    // 0 as that would be invalid, so the zero-check can be used to determine
+    // whether mach_timebase_info has already been called.  This is
+    // recommended by Apple's QA1398.
+    kern_return_t kr = mach_timebase_info(&timebase_info);
+    DCHECK(kr == KERN_SUCCESS);
+  }
+
+  // mach_absolute_time is it when it comes to ticks on the Mac.  Other calls
+  // with less precision (such as TickCount) just call through to
+  // mach_absolute_time.
+
+  // timebase_info converts absolute time tick units into nanoseconds.  Convert
+  // to microseconds up front to stave off overflows.
+  absolute_micro = mach_absolute_time() / Time::kNanosecondsPerMicrosecond *
+                   timebase_info.numer / timebase_info.denom;
+
+  // Don't bother with the rollover handling that the Windows version does.
+  // With numer and denom = 1 (the expected case), the 64-bit absolute time
+  // reported in nanoseconds is enough to last nearly 585 years.
+
+#elif defined(OS_OPENBSD) || defined(OS_POSIX) &&                   \
+                                 defined(_POSIX_MONOTONIC_CLOCK) && \
+                                 _POSIX_MONOTONIC_CLOCK >= 0
+
+  struct timespec ts;
+  if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0) {
+    NOTREACHED() << "clock_gettime(CLOCK_MONOTONIC) failed.";
+    return TimeTicks();
+  }
+
+  absolute_micro =
+      (static_cast<int64_t>(ts.tv_sec) * Time::kMicrosecondsPerSecond) +
+      (static_cast<int64_t>(ts.tv_nsec) / Time::kNanosecondsPerMicrosecond);
+
+#else  // _POSIX_MONOTONIC_CLOCK
+#  error No usable tick clock function on this platform.
+#endif  // _POSIX_MONOTONIC_CLOCK
+
+  return TimeTicks(absolute_micro);
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/time_win.cc b/ipc/chromium/src/base/time_win.cc
new file mode 100644
index 0000000000..d39416cd6d
--- /dev/null
+++ b/ipc/chromium/src/base/time_win.cc
@@ -0,0 +1,263 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Windows Timer Primer
+//
+// A good article:  http://www.ddj.com/windows/184416651
+// A good mozilla bug:  http://bugzilla.mozilla.org/show_bug.cgi?id=363258
+//
+// The default windows timer, GetSystemTimeAsFileTime is not very precise.
+// It is only good to ~15.5ms.
+//
+// QueryPerformanceCounter is the logical choice for a high-precision timer.
+// However, it is known to be buggy on some hardware.  Specifically, it can
+// sometimes "jump".  On laptops, QPC can also be very expensive to call.
+// It's 3-4x slower than timeGetTime() on desktops, but can be 10x slower
+// on laptops.  A unittest exists which will show the relative cost of various
+// timers on any system.
+//
+// The next logical choice is timeGetTime().  timeGetTime has a precision of
+// 1ms, but only if you call APIs (timeBeginPeriod()) which affect all other
+// applications on the system.  By default, precision is only 15.5ms.
+// Unfortunately, we don't want to call timeBeginPeriod because we don't
+// want to affect other applications.  Further, on mobile platforms, use of
+// faster multimedia timers can hurt battery life.  See the intel
+// article about this here:
+// http://softwarecommunity.intel.com/articles/eng/1086.htm
+//
+// To work around all this, we're going to generally use timeGetTime().  We
+// will only increase the system-wide timer if we're not running on battery
+// power.  Using timeBeginPeriod(1) is a requirement in order to make our
+// message loop waits have the same resolution that our time measurements
+// do.  Otherwise, WaitForSingleObject(..., 1) will no less than 15ms when
+// there is nothing else to waken the Wait.
+
+#include "base/time.h"
+
+#ifndef __MINGW32__
+#  pragma comment(lib, "winmm.lib")
+#endif
+#include <windows.h>
+#include <mmsystem.h>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "mozilla/Casting.h"
+#include "mozilla/StaticMutex.h"
+
+using base::Time;
+using base::TimeDelta;
+using base::TimeTicks;
+using mozilla::BitwiseCast;
+
+namespace {
+
+// From MSDN, FILETIME "Contains a 64-bit value representing the number of
+// 100-nanosecond intervals since January 1, 1601 (UTC)."
+int64_t FileTimeToMicroseconds(const FILETIME& ft) {
+  // Need to BitwiseCast to fix alignment, then divide by 10 to convert
+  // 100-nanoseconds to milliseconds. This only works on little-endian
+  // machines.
+  return BitwiseCast<int64_t>(ft) / 10;
+}
+
+void MicrosecondsToFileTime(int64_t us, FILETIME* ft) {
+  DCHECK(us >= 0) << "Time is less than 0, negative values are not "
+                     "representable in FILETIME";
+
+  // Multiply by 10 to convert milliseconds to 100-nanoseconds. BitwiseCast will
+  // handle alignment problems. This only works on little-endian machines.
+  *ft = BitwiseCast<FILETIME>(us * 10);
+}
+
+int64_t CurrentWallclockMicroseconds() {
+  FILETIME ft;
+  ::GetSystemTimeAsFileTime(&ft);
+  return FileTimeToMicroseconds(ft);
+}
+
+// Time between resampling the un-granular clock for this API.  60 seconds.
+const int kMaxMillisecondsToAvoidDrift = 60 * Time::kMillisecondsPerSecond;
+
+int64_t initial_time = 0;
+TimeTicks initial_ticks;
+
+void InitializeClock() {
+  initial_ticks = TimeTicks::Now();
+  initial_time = CurrentWallclockMicroseconds();
+}
+
+}  // namespace
+
+// Time -----------------------------------------------------------------------
+
+// The internal representation of Time uses FILETIME, whose epoch is 1601-01-01
+// 00:00:00 UTC.  ((1970-1601)*365+89)*24*60*60*1000*1000, where 89 is the
+// number of leap year days between 1601 and 1970: (1970-1601)/4 excluding
+// 1700, 1800, and 1900.
+// static
+const int64_t Time::kTimeTToMicrosecondsOffset = GG_INT64_C(11644473600000000);
+
+// static
+Time Time::Now() {
+  if (initial_time == 0) InitializeClock();
+
+  // We implement time using the high-resolution timers so that we can get
+  // timeouts which are smaller than 10-15ms.  If we just used
+  // CurrentWallclockMicroseconds(), we'd have the less-granular timer.
+  //
+  // To make this work, we initialize the clock (initial_time) and the
+  // counter (initial_ctr).  To compute the initial time, we can check
+  // the number of ticks that have elapsed, and compute the delta.
+  //
+  // To avoid any drift, we periodically resync the counters to the system
+  // clock.
+  while (true) {
+    TimeTicks ticks = TimeTicks::Now();
+
+    // Calculate the time elapsed since we started our timer
+    TimeDelta elapsed = ticks - initial_ticks;
+
+    // Check if enough time has elapsed that we need to resync the clock.
+    if (elapsed.InMilliseconds() > kMaxMillisecondsToAvoidDrift) {
+      InitializeClock();
+      continue;
+    }
+
+    return Time(elapsed + Time(initial_time));
+  }
+}
+
+// static
+Time Time::NowFromSystemTime() {
+  // Force resync.
+  InitializeClock();
+  return Time(initial_time);
+}
+
+// static
+Time Time::FromExploded(bool is_local, const Exploded& exploded) {
+  // Create the system struct representing our exploded time. It will either be
+  // in local time or UTC.
+  SYSTEMTIME st;
+  st.wYear = exploded.year;
+  st.wMonth = exploded.month;
+  st.wDayOfWeek = exploded.day_of_week;
+  st.wDay = exploded.day_of_month;
+  st.wHour = exploded.hour;
+  st.wMinute = exploded.minute;
+  st.wSecond = exploded.second;
+  st.wMilliseconds = exploded.millisecond;
+
+  // Convert to FILETIME.
+  FILETIME ft;
+  if (!SystemTimeToFileTime(&st, &ft)) {
+    NOTREACHED() << "Unable to convert time";
+    return Time(0);
+  }
+
+  // Ensure that it's in UTC.
+  if (is_local) {
+    FILETIME utc_ft;
+    LocalFileTimeToFileTime(&ft, &utc_ft);
+    return Time(FileTimeToMicroseconds(utc_ft));
+  }
+  return Time(FileTimeToMicroseconds(ft));
+}
+
+void Time::Explode(bool is_local, Exploded* exploded) const {
+  // FILETIME in UTC.
+  FILETIME utc_ft;
+  MicrosecondsToFileTime(us_, &utc_ft);
+
+  // FILETIME in local time if necessary.
+  BOOL success = TRUE;
+  FILETIME ft;
+  if (is_local)
+    success = FileTimeToLocalFileTime(&utc_ft, &ft);
+  else
+    ft = utc_ft;
+
+  // FILETIME in SYSTEMTIME (exploded).
+  SYSTEMTIME st;
+  if (!success || !FileTimeToSystemTime(&ft, &st)) {
+    NOTREACHED() << "Unable to convert time, don't know why";
+    ZeroMemory(exploded, sizeof(*exploded));
+    return;
+  }
+
+  exploded->year = st.wYear;
+  exploded->month = st.wMonth;
+  exploded->day_of_week = st.wDayOfWeek;
+  exploded->day_of_month = st.wDay;
+  exploded->hour = st.wHour;
+  exploded->minute = st.wMinute;
+  exploded->second = st.wSecond;
+  exploded->millisecond = st.wMilliseconds;
+}
+
+// TimeTicks ------------------------------------------------------------------
+namespace {
+
+// We define a wrapper to adapt between the __stdcall and __cdecl call of the
+// mock function, and to avoid a static constructor.  Assigning an import to a
+// function pointer directly would require setup code to fetch from the IAT.
+DWORD timeGetTimeWrapper() { return timeGetTime(); }
+
+DWORD (*tick_function)(void) = &timeGetTimeWrapper;
+
+// This setup is a little gross: the `now` instance lives until libxul is
+// unloaded, but leak checking runs prior to that, and would see a Mutex
+// instance contained in NowSingleton as still live.  Said instance would
+// be reported as a leak...but it's not, really.  To avoid that, we need
+// to use StaticMutex (which is not leak-checked), but StaticMutex can't
+// be a member variable.  So we have to have this separate static variable.
+static mozilla::StaticMutex sNowSingletonLock;
+
+// We use timeGetTime() to implement TimeTicks::Now().  This can be problematic
+// because it returns the number of milliseconds since Windows has started,
+// which will roll over the 32-bit value every ~49 days.  We try to track
+// rollover ourselves, which works if TimeTicks::Now() is called at least every
+// 49 days.
+class NowSingleton {
+ public:
+  TimeDelta Now() {
+    mozilla::StaticMutexAutoLock locked(sNowSingletonLock);
+    // We should hold the lock while calling tick_function to make sure that
+    // we keep our last_seen_ stay correctly in sync.
+    DWORD now = tick_function();
+    if (now < last_seen_)
+      rollover_ +=
+          TimeDelta::FromMilliseconds(GG_LONGLONG(0x100000000));  // ~49.7 days.
+    last_seen_ = now;
+    return TimeDelta::FromMilliseconds(now) + rollover_;
+  }
+
+  static NowSingleton& instance() {
+    static NowSingleton now;
+    return now;
+  }
+
+ private:
+  explicit NowSingleton()
+      : rollover_(TimeDelta::FromMilliseconds(0)), last_seen_(0) {}
+  ~NowSingleton() = default;
+
+  TimeDelta rollover_ MOZ_GUARDED_BY(
+      sNowSingletonLock);  // Accumulation of time lost due to rollover.
+  DWORD last_seen_
+      MOZ_GUARDED_BY(sNowSingletonLock);  // The last timeGetTime value we saw,
+                                          // to detect rollover.
+
+  DISALLOW_COPY_AND_ASSIGN(NowSingleton);
+};
+
+}  // namespace
+
+// static
+TimeTicks TimeTicks::Now() {
+  return TimeTicks() + NowSingleton::instance().Now();
+}
diff --git a/ipc/chromium/src/base/timer.cc b/ipc/chromium/src/base/timer.cc
new file mode 100644
index 0000000000..b2d880797a
--- /dev/null
+++ b/ipc/chromium/src/base/timer.cc
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/timer.h"
+
+#include "base/message_loop.h"
+
+namespace base {
+
+void BaseTimer_Helper::OrphanDelayedTask() {
+  if (delayed_task_) {
+    delayed_task_->timer_ = nullptr;
+    delayed_task_ = nullptr;
+  }
+}
+
+void BaseTimer_Helper::InitiateDelayedTask(TimerTask* timer_task) {
+  OrphanDelayedTask();
+
+  delayed_task_ = timer_task;
+  delayed_task_->timer_ = this;
+  RefPtr<TimerTask> addrefedTask = timer_task;
+  MessageLoop::current()->PostDelayedTask(
+      addrefedTask.forget(),
+      static_cast<int>(timer_task->delay_.InMilliseconds()));
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/timer.h b/ipc/chromium/src/base/timer.h
new file mode 100644
index 0000000000..eceea8d23b
--- /dev/null
+++ b/ipc/chromium/src/base/timer.h
@@ -0,0 +1,261 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// OneShotTimer and RepeatingTimer provide a simple timer API.  As the names
+// suggest, OneShotTimer calls you back once after a time delay expires.
+// RepeatingTimer on the other hand calls you back periodically with the
+// prescribed time interval.
+//
+// OneShotTimer and RepeatingTimer both cancel the timer when they go out of
+// scope, which makes it easy to ensure that you do not get called when your
+// object has gone out of scope.  Just instantiate a OneShotTimer or
+// RepeatingTimer as a member variable of the class for which you wish to
+// receive timer events.
+//
+// Sample RepeatingTimer usage:
+//
+//   class MyClass {
+//    public:
+//     void StartDoingStuff() {
+//       timer_.Start(TimeDelta::FromSeconds(1), this, &MyClass::DoStuff);
+//     }
+//     void StopDoingStuff() {
+//       timer_.Stop();
+//     }
+//    private:
+//     void DoStuff() {
+//       // This method is called every second to do stuff.
+//       ...
+//     }
+//     base::RepeatingTimer<MyClass> timer_;
+//   };
+//
+// Both OneShotTimer and RepeatingTimer also support a Reset method, which
+// allows you to easily defer the timer event until the timer delay passes once
+// again.  So, in the above example, if 0.5 seconds have already passed,
+// calling Reset on timer_ would postpone DoStuff by another 1 second.  In
+// other words, Reset is shorthand for calling Stop and then Start again with
+// the same arguments.
+
+#ifndef BASE_TIMER_H_
+#define BASE_TIMER_H_
+
+// IMPORTANT: If you change timer code, make sure that all tests (including
+// disabled ones) from timer_unittests.cc pass locally. Some are disabled
+// because they're flaky on the buildbot, but when you run them locally you
+// should be able to tell the difference.
+
+#include "base/logging.h"
+#include "base/task.h"
+#include "base/time.h"
+
+class MessageLoop;
+
+namespace base {
+
+//-----------------------------------------------------------------------------
+// This class is an implementation detail of OneShotTimer and RepeatingTimer.
+// Please do not use this class directly.
+//
+// This class exists to share code between BaseTimer<T> template instantiations.
+//
+class BaseTimer_Helper {
+ public:
+  // Stops the timer.
+  ~BaseTimer_Helper() { OrphanDelayedTask(); }
+
+  // Returns true if the timer is running (i.e., not stopped).
+  bool IsRunning() const { return !!delayed_task_; }
+
+  // Returns the current delay for this timer.  May only call this method when
+  // the timer is running!
+  TimeDelta GetCurrentDelay() const {
+    DCHECK(IsRunning());
+    return delayed_task_->delay_;
+  }
+
+ protected:
+  BaseTimer_Helper() {}
+
+  // We have access to the timer_ member so we can orphan this task.
+  class TimerTask : public mozilla::Runnable {
+   public:
+    explicit TimerTask(TimeDelta delay)
+        : mozilla::Runnable("base::BaseTimer_Helper::TimerTask"),
+          delay_(delay) {
+      // timer_ is set in InitiateDelayedTask.
+    }
+    virtual ~TimerTask() {}
+    BaseTimer_Helper* timer_;
+    TimeDelta delay_;
+  };
+
+  // Used to orphan delayed_task_ so that when it runs it does nothing.
+  void OrphanDelayedTask();
+
+  // Used to initiated a new delayed task.  This has the side-effect of
+  // orphaning delayed_task_ if it is non-null.
+  void InitiateDelayedTask(TimerTask* timer_task);
+
+  RefPtr<TimerTask> delayed_task_;
+
+  DISALLOW_COPY_AND_ASSIGN(BaseTimer_Helper);
+};
+
+//-----------------------------------------------------------------------------
+// This class is an implementation detail of OneShotTimer and RepeatingTimer.
+// Please do not use this class directly.
+template <class Receiver, bool kIsRepeating>
+class BaseTimer : public BaseTimer_Helper {
+ public:
+  typedef void (Receiver::*ReceiverMethod)();
+
+  // Call this method to start the timer.  It is an error to call this method
+  // while the timer is already running.
+  void Start(TimeDelta delay, Receiver* receiver, ReceiverMethod method) {
+    DCHECK(!IsRunning());
+    InitiateDelayedTask(new TimerTask(delay, receiver, method));
+  }
+
+  // Call this method to stop the timer.  It is a no-op if the timer is not
+  // running.
+  void Stop() { OrphanDelayedTask(); }
+
+  // Call this method to reset the timer delay of an already running timer.
+  void Reset() {
+    DCHECK(IsRunning());
+    InitiateDelayedTask(static_cast<TimerTask*>(delayed_task_.get())->Clone());
+  }
+
+ private:
+  typedef BaseTimer<Receiver, kIsRepeating> SelfType;
+
+  class TimerTask : public BaseTimer_Helper::TimerTask {
+   public:
+    TimerTask(TimeDelta delay, Receiver* receiver, ReceiverMethod method)
+        : BaseTimer_Helper::TimerTask(delay),
+          receiver_(receiver),
+          method_(method) {}
+
+    virtual ~TimerTask() {
+      // This task may be getting cleared because the MessageLoop has been
+      // destructed.  If so, don't leave the Timer with a dangling pointer
+      // to this now-defunct task.
+      ClearBaseTimer();
+    }
+
+    NS_IMETHOD Run() override {
+      if (!timer_)  // timer_ is null if we were orphaned.
+        return NS_OK;
+      if (kIsRepeating)
+        ResetBaseTimer();
+      else
+        ClearBaseTimer();
+      DispatchToMethod(receiver_, method_, Tuple0());
+      return NS_OK;
+    }
+
+    TimerTask* Clone() const {
+      return new TimerTask(delay_, receiver_, method_);
+    }
+
+   private:
+    // Inform the Base that the timer is no longer active.
+    void ClearBaseTimer() {
+      if (timer_) {
+        SelfType* self = static_cast<SelfType*>(timer_);
+        // It is possible that the Timer has already been reset, and that this
+        // Task is old.  So, if the Timer points to a different task, assume
+        // that the Timer has already taken care of properly setting the task.
+        if (self->delayed_task_ == this) self->delayed_task_ = nullptr;
+        // By now the delayed_task_ in the Timer does not point to us anymore.
+        // We should reset our own timer_ because the Timer can not do this
+        // for us in its destructor.
+        timer_ = NULL;
+      }
+    }
+
+    // Inform the Base that we're resetting the timer.
+    void ResetBaseTimer() {
+      DCHECK(timer_);
+      DCHECK(kIsRepeating);
+      SelfType* self = static_cast<SelfType*>(timer_);
+      self->Reset();
+    }
+
+    Receiver* receiver_;
+    ReceiverMethod method_;
+  };
+};
+
+//-----------------------------------------------------------------------------
+// A simple, one-shot timer.  See usage notes at the top of the file.
+template <class Receiver>
+class OneShotTimer : public BaseTimer<Receiver, false> {};
+
+//-----------------------------------------------------------------------------
+// A simple, repeating timer.  See usage notes at the top of the file.
+template <class Receiver>
+class RepeatingTimer : public BaseTimer<Receiver, true> {};
+
+//-----------------------------------------------------------------------------
+// A Delay timer is like The Button from Lost. Once started, you have to keep
+// calling Reset otherwise it will call the given method in the MessageLoop
+// thread.
+//
+// Once created, it is inactive until Reset is called. Once |delay| seconds have
+// passed since the last call to Reset, the callback is made. Once the callback
+// has been made, it's inactive until Reset is called again.
+//
+// If destroyed, the timeout is canceled and will not occur even if already
+// inflight.
+template <class Receiver>
+class DelayTimer {
+ public:
+  typedef void (Receiver::*ReceiverMethod)();
+
+  DelayTimer(TimeDelta delay, Receiver* receiver, ReceiverMethod method)
+      : receiver_(receiver), method_(method), delay_(delay) {}
+
+  void Reset() { DelayFor(delay_); }
+
+ private:
+  void DelayFor(TimeDelta delay) {
+    trigger_time_ = Time::Now() + delay;
+
+    // If we already have a timer that will expire at or before the given delay,
+    // then we have nothing more to do now.
+    if (timer_.IsRunning() && timer_.GetCurrentDelay() <= delay) return;
+
+    // The timer isn't running, or will expire too late, so restart it.
+    timer_.Stop();
+    timer_.Start(delay, this, &DelayTimer<Receiver>::Check);
+  }
+
+  void Check() {
+    if (trigger_time_.is_null()) return;
+
+    // If we have not waited long enough, then wait some more.
+    const Time now = Time::Now();
+    if (now < trigger_time_) {
+      DelayFor(trigger_time_ - now);
+      return;
+    }
+
+    (receiver_->*method_)();
+  }
+
+  Receiver* const receiver_;
+  const ReceiverMethod method_;
+  const TimeDelta delay_;
+
+  OneShotTimer<DelayTimer<Receiver> > timer_;
+  Time trigger_time_;
+};
+
+}  // namespace base
+
+#endif  // BASE_TIMER_H_
diff --git a/ipc/chromium/src/base/tuple.h b/ipc/chromium/src/base/tuple.h
new file mode 100644
index 0000000000..62655784d4
--- /dev/null
+++ b/ipc/chromium/src/base/tuple.h
@@ -0,0 +1,838 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// A Tuple is a generic templatized container, similar in concept to std::pair.
+// There are classes Tuple0 to Tuple6, cooresponding to the number of elements
+// it contains.  The convenient MakeTuple() function takes 0 to 6 arguments,
+// and will construct and return the appropriate Tuple object.  The functions
+// DispatchToMethod and DispatchToFunction take a function pointer or instance
+// and method pointer, and unpack a tuple into arguments to the call.
+//
+// Tuple elements are copied by value, and stored in the tuple.  See the unit
+// tests for more details of how/when the values are copied.
+//
+// Example usage:
+//   // These two methods of creating a Tuple are identical.
+//   Tuple2<int, const char*> tuple_a(1, "wee");
+//   Tuple2<int, const char*> tuple_b = MakeTuple(1, "wee");
+//
+//   void SomeFunc(int a, const char* b) { }
+//   DispatchToFunction(&SomeFunc, tuple_a);  // SomeFunc(1, "wee")
+//   DispatchToFunction(
+//       &SomeFunc, MakeTuple(10, "foo"));    // SomeFunc(10, "foo")
+//
+//   struct { void SomeMeth(int a, int b, int c) { } } foo;
+//   DispatchToMethod(&foo, &Foo::SomeMeth, MakeTuple(1, 2, 3));
+//   // foo->SomeMeth(1, 2, 3);
+
+#ifndef BASE_TUPLE_H__
+#define BASE_TUPLE_H__
+
+// Traits ----------------------------------------------------------------------
+//
+// A simple traits class for tuple arguments.
+//
+// ValueType: the bare, nonref version of a type (same as the type for nonrefs).
+// RefType: the ref version of a type (same as the type for refs).
+// ParamType: what type to pass to functions (refs should not be constified).
+
+template <class P>
+struct TupleTraits {
+  typedef P ValueType;
+  typedef P& RefType;
+  typedef const P& ParamType;
+};
+
+template <class P>
+struct TupleTraits<P&> {
+  typedef P ValueType;
+  typedef P& RefType;
+  typedef P& ParamType;
+};
+
+// Tuple -----------------------------------------------------------------------
+//
+// This set of classes is useful for bundling 0 or more heterogeneous data types
+// into a single variable.  The advantage of this is that it greatly simplifies
+// function objects that need to take an arbitrary number of parameters; see
+// RunnableMethod and IPC::MessageWithTuple.
+//
+// Tuple0 is supplied to act as a 'void' type.  It can be used, for example,
+// when dispatching to a function that accepts no arguments (see the
+// Dispatchers below).
+// Tuple1<A> is rarely useful.  One such use is when A is non-const ref that you
+// want filled by the dispatchee, and the tuple is merely a container for that
+// output (a "tier").  See MakeRefTuple and its usages.
+
+struct Tuple0 {
+  typedef Tuple0 ValueTuple;
+  typedef Tuple0 RefTuple;
+};
+
+template <class A>
+struct Tuple1 {
+ public:
+  typedef A TypeA;
+  typedef Tuple1<typename TupleTraits<A>::ValueType> ValueTuple;
+  typedef Tuple1<typename TupleTraits<A>::RefType> RefTuple;
+
+  Tuple1() {}
+  explicit Tuple1(typename TupleTraits<A>::ParamType aA) : a(aA) {}
+
+  A a;
+};
+
+template <class A, class B>
+struct Tuple2 {
+ public:
+  typedef A TypeA;
+  typedef B TypeB;
+  typedef Tuple2<typename TupleTraits<A>::ValueType,
+                 typename TupleTraits<B>::ValueType>
+      ValueTuple;
+  typedef Tuple2<typename TupleTraits<A>::RefType,
+                 typename TupleTraits<B>::RefType>
+      RefTuple;
+
+  Tuple2() {}
+  Tuple2(typename TupleTraits<A>::ParamType aA,
+         typename TupleTraits<B>::ParamType aB)
+      : a(aA), b(aB) {}
+
+  A a;
+  B b;
+};
+
+template <class A, class B, class C>
+struct Tuple3 {
+ public:
+  typedef A TypeA;
+  typedef B TypeB;
+  typedef C TypeC;
+  typedef Tuple3<typename TupleTraits<A>::ValueType,
+                 typename TupleTraits<B>::ValueType,
+                 typename TupleTraits<C>::ValueType>
+      ValueTuple;
+  typedef Tuple3<typename TupleTraits<A>::RefType,
+                 typename TupleTraits<B>::RefType,
+                 typename TupleTraits<C>::RefType>
+      RefTuple;
+
+  Tuple3() {}
+  Tuple3(typename TupleTraits<A>::ParamType aA,
+         typename TupleTraits<B>::ParamType aB,
+         typename TupleTraits<C>::ParamType aC)
+      : a(aA), b(aB), c(aC) {}
+
+  A a;
+  B b;
+  C c;
+};
+
+template <class A, class B, class C, class D>
+struct Tuple4 {
+ public:
+  typedef A TypeA;
+  typedef B TypeB;
+  typedef C TypeC;
+  typedef D TypeD;
+  typedef Tuple4<
+      typename TupleTraits<A>::ValueType, typename TupleTraits<B>::ValueType,
+      typename TupleTraits<C>::ValueType, typename TupleTraits<D>::ValueType>
+      ValueTuple;
+  typedef Tuple4<
+      typename TupleTraits<A>::RefType, typename TupleTraits<B>::RefType,
+      typename TupleTraits<C>::RefType, typename TupleTraits<D>::RefType>
+      RefTuple;
+
+  Tuple4() {}
+  Tuple4(typename TupleTraits<A>::ParamType aA,
+         typename TupleTraits<B>::ParamType aB,
+         typename TupleTraits<C>::ParamType aC,
+         typename TupleTraits<D>::ParamType aD)
+      : a(aA), b(aB), c(aC), d(aD) {}
+
+  A a;
+  B b;
+  C c;
+  D d;
+};
+
+template <class A, class B, class C, class D, class E>
+struct Tuple5 {
+ public:
+  typedef A TypeA;
+  typedef B TypeB;
+  typedef C TypeC;
+  typedef D TypeD;
+  typedef E TypeE;
+  typedef Tuple5<
+      typename TupleTraits<A>::ValueType, typename TupleTraits<B>::ValueType,
+      typename TupleTraits<C>::ValueType, typename TupleTraits<D>::ValueType,
+      typename TupleTraits<E>::ValueType>
+      ValueTuple;
+  typedef Tuple5<
+      typename TupleTraits<A>::RefType, typename TupleTraits<B>::RefType,
+      typename TupleTraits<C>::RefType, typename TupleTraits<D>::RefType,
+      typename TupleTraits<E>::RefType>
+      RefTuple;
+
+  Tuple5() {}
+  Tuple5(typename TupleTraits<A>::ParamType aA,
+         typename TupleTraits<B>::ParamType aB,
+         typename TupleTraits<C>::ParamType aC,
+         typename TupleTraits<D>::ParamType aD,
+         typename TupleTraits<E>::ParamType aE)
+      : a(aA), b(aB), c(aC), d(aD), e(aE) {}
+
+  A a;
+  B b;
+  C c;
+  D d;
+  E e;
+};
+
+template <class A, class B, class C, class D, class E, class F>
+struct Tuple6 {
+ public:
+  typedef A TypeA;
+  typedef B TypeB;
+  typedef C TypeC;
+  typedef D TypeD;
+  typedef E TypeE;
+  typedef F TypeF;
+  typedef Tuple6<
+      typename TupleTraits<A>::ValueType, typename TupleTraits<B>::ValueType,
+      typename TupleTraits<C>::ValueType, typename TupleTraits<D>::ValueType,
+      typename TupleTraits<E>::ValueType, typename TupleTraits<F>::ValueType>
+      ValueTuple;
+  typedef Tuple6<
+      typename TupleTraits<A>::RefType, typename TupleTraits<B>::RefType,
+      typename TupleTraits<C>::RefType, typename TupleTraits<D>::RefType,
+      typename TupleTraits<E>::RefType, typename TupleTraits<F>::RefType>
+      RefTuple;
+
+  Tuple6() {}
+  Tuple6(typename TupleTraits<A>::ParamType aA,
+         typename TupleTraits<B>::ParamType aB,
+         typename TupleTraits<C>::ParamType aC,
+         typename TupleTraits<D>::ParamType aD,
+         typename TupleTraits<E>::ParamType aE,
+         typename TupleTraits<F>::ParamType aF)
+      : a(aA), b(aB), c(aC), d(aD), e(aE), f(aF) {}
+
+  A a;
+  B b;
+  C c;
+  D d;
+  E e;
+  F f;
+};
+
+template <class A, class B, class C, class D, class E, class F, class G>
+struct Tuple7 {
+ public:
+  typedef A TypeA;
+  typedef B TypeB;
+  typedef C TypeC;
+  typedef D TypeD;
+  typedef E TypeE;
+  typedef F TypeF;
+  typedef G TypeG;
+  typedef Tuple7<
+      typename TupleTraits<A>::ValueType, typename TupleTraits<B>::ValueType,
+      typename TupleTraits<C>::ValueType, typename TupleTraits<D>::ValueType,
+      typename TupleTraits<E>::ValueType, typename TupleTraits<F>::ValueType,
+      typename TupleTraits<G>::ValueType>
+      ValueTuple;
+  typedef Tuple7<
+      typename TupleTraits<A>::RefType, typename TupleTraits<B>::RefType,
+      typename TupleTraits<C>::RefType, typename TupleTraits<D>::RefType,
+      typename TupleTraits<E>::RefType, typename TupleTraits<F>::RefType,
+      typename TupleTraits<G>::RefType>
+      RefTuple;
+
+  Tuple7() {}
+  Tuple7(typename TupleTraits<A>::ParamType aA,
+         typename TupleTraits<B>::ParamType aB,
+         typename TupleTraits<C>::ParamType aC,
+         typename TupleTraits<D>::ParamType aD,
+         typename TupleTraits<E>::ParamType aE,
+         typename TupleTraits<F>::ParamType aF,
+         typename TupleTraits<G>::ParamType aG)
+      : a(aA), b(aB), c(aC), d(aD), e(aE), f(aF), g(aG) {}
+
+  A a;
+  B b;
+  C c;
+  D d;
+  E e;
+  F f;
+  G g;
+};
+
+// Tuple creators -------------------------------------------------------------
+//
+// Helper functions for constructing tuples while inferring the template
+// argument types.
+
+namespace base {
+
+inline Tuple0 MakeTuple() { return Tuple0(); }
+
+template <class A>
+inline Tuple1<A> MakeTuple(const A& a) {
+  return Tuple1<A>(a);
+}
+
+template <class A, class B>
+inline Tuple2<A, B> MakeTuple(const A& a, const B& b) {
+  return Tuple2<A, B>(a, b);
+}
+
+template <class A, class B, class C>
+inline Tuple3<A, B, C> MakeTuple(const A& a, const B& b, const C& c) {
+  return Tuple3<A, B, C>(a, b, c);
+}
+
+template <class A, class B, class C, class D>
+inline Tuple4<A, B, C, D> MakeTuple(const A& a, const B& b, const C& c,
+                                    const D& d) {
+  return Tuple4<A, B, C, D>(a, b, c, d);
+}
+
+template <class A, class B, class C, class D, class E>
+inline Tuple5<A, B, C, D, E> MakeTuple(const A& a, const B& b, const C& c,
+                                       const D& d, const E& e) {
+  return Tuple5<A, B, C, D, E>(a, b, c, d, e);
+}
+
+template <class A, class B, class C, class D, class E, class F>
+inline Tuple6<A, B, C, D, E, F> MakeTuple(const A& a, const B& b, const C& c,
+                                          const D& d, const E& e, const F& f) {
+  return Tuple6<A, B, C, D, E, F>(a, b, c, d, e, f);
+}
+
+template <class A, class B, class C, class D, class E, class F, class G>
+inline Tuple7<A, B, C, D, E, F, G> MakeTuple(const A& a, const B& b, const C& c,
+                                             const D& d, const E& e, const F& f,
+                                             const G& g) {
+  return Tuple7<A, B, C, D, E, F, G>(a, b, c, d, e, f, g);
+}
+
+}  // end namespace base
+
+// The following set of helpers make what Boost refers to as "Tiers" - a tuple
+// of references.
+
+template <class A>
+inline Tuple1<A&> MakeRefTuple(A& a) {
+  return Tuple1<A&>(a);
+}
+
+template <class A, class B>
+inline Tuple2<A&, B&> MakeRefTuple(A& a, B& b) {
+  return Tuple2<A&, B&>(a, b);
+}
+
+template <class A, class B, class C>
+inline Tuple3<A&, B&, C&> MakeRefTuple(A& a, B& b, C& c) {
+  return Tuple3<A&, B&, C&>(a, b, c);
+}
+
+template <class A, class B, class C, class D>
+inline Tuple4<A&, B&, C&, D&> MakeRefTuple(A& a, B& b, C& c, D& d) {
+  return Tuple4<A&, B&, C&, D&>(a, b, c, d);
+}
+
+template <class A, class B, class C, class D, class E>
+inline Tuple5<A&, B&, C&, D&, E&> MakeRefTuple(A& a, B& b, C& c, D& d, E& e) {
+  return Tuple5<A&, B&, C&, D&, E&>(a, b, c, d, e);
+}
+
+template <class A, class B, class C, class D, class E, class F>
+inline Tuple6<A&, B&, C&, D&, E&, F&> MakeRefTuple(A& a, B& b, C& c, D& d, E& e,
+                                                   F& f) {
+  return Tuple6<A&, B&, C&, D&, E&, F&>(a, b, c, d, e, f);
+}
+
+template <class A, class B, class C, class D, class E, class F, class G>
+inline Tuple7<A&, B&, C&, D&, E&, F&, G&> MakeRefTuple(A& a, B& b, C& c, D& d,
+                                                       E& e, F& f, G& g) {
+  return Tuple7<A&, B&, C&, D&, E&, F&, G&>(a, b, c, d, e, f, g);
+}
+
+// Dispatchers ----------------------------------------------------------------
+//
+// Helper functions that call the given method on an object, with the unpacked
+// tuple arguments.  Notice that they all have the same number of arguments,
+// so you need only write:
+//   DispatchToMethod(object, &Object::method, args);
+// This is very useful for templated dispatchers, since they don't need to know
+// what type |args| is.
+
+// Non-Static Dispatchers with no out params.
+
+template <class ObjT, class Method>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple0& arg) {
+  (obj->*method)();
+}
+
+template <class ObjT, class Method, class A>
+inline void DispatchToMethod(ObjT* obj, Method method, const A& arg) {
+  (obj->*method)(arg);
+}
+
+template <class ObjT, class Method, class A>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple1<A>& arg) {
+  (obj->*method)(arg.a);
+}
+
+template <class ObjT, class Method, class A, class B>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple2<A, B>& arg) {
+  (obj->*method)(arg.a, arg.b);
+}
+
+template <class ObjT, class Method, class A, class B, class C>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple3<A, B, C>& arg) {
+  (obj->*method)(arg.a, arg.b, arg.c);
+}
+
+template <class ObjT, class Method, class A, class B, class C, class D>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple4<A, B, C, D>& arg) {
+  (obj->*method)(arg.a, arg.b, arg.c, arg.d);
+}
+
+template <class ObjT, class Method, class A, class B, class C, class D, class E>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple5<A, B, C, D, E>& arg) {
+  (obj->*method)(arg.a, arg.b, arg.c, arg.d, arg.e);
+}
+
+template <class ObjT, class Method, class A, class B, class C, class D, class E,
+          class F>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple6<A, B, C, D, E, F>& arg) {
+  (obj->*method)(arg.a, arg.b, arg.c, arg.d, arg.e, arg.f);
+}
+
+template <class ObjT, class Method, class A, class B, class C, class D, class E,
+          class F, class G>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple7<A, B, C, D, E, F, G>& arg) {
+  (obj->*method)(arg.a, arg.b, arg.c, arg.d, arg.e, arg.f, arg.g);
+}
+
+// Static Dispatchers with no out params.
+
+template <class Function>
+inline void DispatchToFunction(Function function, const Tuple0& arg) {
+  (*function)();
+}
+
+template <class Function, class A>
+inline void DispatchToFunction(Function function, const A& arg) {
+  (*function)(arg);
+}
+
+template <class Function, class A>
+inline void DispatchToFunction(Function function, const Tuple1<A>& arg) {
+  (*function)(arg.a);
+}
+
+template <class Function, class A, class B>
+inline void DispatchToFunction(Function function, const Tuple2<A, B>& arg) {
+  (*function)(arg.a, arg.b);
+}
+
+template <class Function, class A, class B, class C>
+inline void DispatchToFunction(Function function, const Tuple3<A, B, C>& arg) {
+  (*function)(arg.a, arg.b, arg.c);
+}
+
+template <class Function, class A, class B, class C, class D>
+inline void DispatchToFunction(Function function,
+                               const Tuple4<A, B, C, D>& arg) {
+  (*function)(arg.a, arg.b, arg.c, arg.d);
+}
+
+template <class Function, class A, class B, class C, class D, class E>
+inline void DispatchToFunction(Function function,
+                               const Tuple5<A, B, C, D, E>& arg) {
+  (*function)(arg.a, arg.b, arg.c, arg.d, arg.e);
+}
+
+template <class Function, class A, class B, class C, class D, class E, class F>
+inline void DispatchToFunction(Function function,
+                               const Tuple6<A, B, C, D, E, F>& arg) {
+  (*function)(arg.a, arg.b, arg.c, arg.d, arg.e, arg.f);
+}
+
+// Dispatchers with 0 out param (as a Tuple0).
+
+template <class ObjT, class Method>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple0& arg,
+                             Tuple0*) {
+  (obj->*method)();
+}
+
+template <class ObjT, class Method, class A>
+inline void DispatchToMethod(ObjT* obj, Method method, const A& arg, Tuple0*) {
+  (obj->*method)(arg);
+}
+
+template <class ObjT, class Method, class A>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple1<A>& arg,
+                             Tuple0*) {
+  (obj->*method)(arg.a);
+}
+
+template <class ObjT, class Method, class A, class B>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple2<A, B>& arg,
+                             Tuple0*) {
+  (obj->*method)(arg.a, arg.b);
+}
+
+template <class ObjT, class Method, class A, class B, class C>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple3<A, B, C>& arg, Tuple0*) {
+  (obj->*method)(arg.a, arg.b, arg.c);
+}
+
+template <class ObjT, class Method, class A, class B, class C, class D>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple4<A, B, C, D>& arg, Tuple0*) {
+  (obj->*method)(arg.a, arg.b, arg.c, arg.d);
+}
+
+template <class ObjT, class Method, class A, class B, class C, class D, class E>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple5<A, B, C, D, E>& arg, Tuple0*) {
+  (obj->*method)(arg.a, arg.b, arg.c, arg.d, arg.e);
+}
+
+template <class ObjT, class Method, class A, class B, class C, class D, class E,
+          class F>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple6<A, B, C, D, E, F>& arg, Tuple0*) {
+  (obj->*method)(arg.a, arg.b, arg.c, arg.d, arg.e, arg.f);
+}
+
+// Dispatchers with 1 out param.
+
+template <class ObjT, class Method, class OutA>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple0& in,
+                             Tuple1<OutA>* out) {
+  (obj->*method)(&out->a);
+}
+
+template <class ObjT, class Method, class InA, class OutA>
+inline void DispatchToMethod(ObjT* obj, Method method, const InA& in,
+                             Tuple1<OutA>* out) {
+  (obj->*method)(in, &out->a);
+}
+
+template <class ObjT, class Method, class InA, class OutA>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple1<InA>& in,
+                             Tuple1<OutA>* out) {
+  (obj->*method)(in.a, &out->a);
+}
+
+template <class ObjT, class Method, class InA, class InB, class OutA>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple2<InA, InB>& in, Tuple1<OutA>* out) {
+  (obj->*method)(in.a, in.b, &out->a);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class OutA>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple3<InA, InB, InC>& in,
+                             Tuple1<OutA>* out) {
+  (obj->*method)(in.a, in.b, in.c, &out->a);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class OutA>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple4<InA, InB, InC, InD>& in,
+                             Tuple1<OutA>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, &out->a);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class InE, class OutA>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple5<InA, InB, InC, InD, InE>& in,
+                             Tuple1<OutA>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, in.e, &out->a);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class InE, class InF, class OutA>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple6<InA, InB, InC, InD, InE, InF>& in,
+                             Tuple1<OutA>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, in.e, in.f, &out->a);
+}
+
+// Dispatchers with 2 out params.
+
+template <class ObjT, class Method, class OutA, class OutB>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple0& in,
+                             Tuple2<OutA, OutB>* out) {
+  (obj->*method)(&out->a, &out->b);
+}
+
+template <class ObjT, class Method, class InA, class OutA, class OutB>
+inline void DispatchToMethod(ObjT* obj, Method method, const InA& in,
+                             Tuple2<OutA, OutB>* out) {
+  (obj->*method)(in, &out->a, &out->b);
+}
+
+template <class ObjT, class Method, class InA, class OutA, class OutB>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple1<InA>& in,
+                             Tuple2<OutA, OutB>* out) {
+  (obj->*method)(in.a, &out->a, &out->b);
+}
+
+template <class ObjT, class Method, class InA, class InB, class OutA,
+          class OutB>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple2<InA, InB>& in,
+                             Tuple2<OutA, OutB>* out) {
+  (obj->*method)(in.a, in.b, &out->a, &out->b);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class OutA,
+          class OutB>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple3<InA, InB, InC>& in,
+                             Tuple2<OutA, OutB>* out) {
+  (obj->*method)(in.a, in.b, in.c, &out->a, &out->b);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class OutA, class OutB>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple4<InA, InB, InC, InD>& in,
+                             Tuple2<OutA, OutB>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, &out->a, &out->b);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class InE, class OutA, class OutB>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple5<InA, InB, InC, InD, InE>& in,
+                             Tuple2<OutA, OutB>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, in.e, &out->a, &out->b);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class InE, class InF, class OutA, class OutB>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple6<InA, InB, InC, InD, InE, InF>& in,
+                             Tuple2<OutA, OutB>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, in.e, in.f, &out->a, &out->b);
+}
+
+// Dispatchers with 3 out params.
+
+template <class ObjT, class Method, class OutA, class OutB, class OutC>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple0& in,
+                             Tuple3<OutA, OutB, OutC>* out) {
+  (obj->*method)(&out->a, &out->b, &out->c);
+}
+
+template <class ObjT, class Method, class InA, class OutA, class OutB,
+          class OutC>
+inline void DispatchToMethod(ObjT* obj, Method method, const InA& in,
+                             Tuple3<OutA, OutB, OutC>* out) {
+  (obj->*method)(in, &out->a, &out->b, &out->c);
+}
+
+template <class ObjT, class Method, class InA, class OutA, class OutB,
+          class OutC>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple1<InA>& in,
+                             Tuple3<OutA, OutB, OutC>* out) {
+  (obj->*method)(in.a, &out->a, &out->b, &out->c);
+}
+
+template <class ObjT, class Method, class InA, class InB, class OutA,
+          class OutB, class OutC>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple2<InA, InB>& in,
+                             Tuple3<OutA, OutB, OutC>* out) {
+  (obj->*method)(in.a, in.b, &out->a, &out->b, &out->c);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class OutA,
+          class OutB, class OutC>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple3<InA, InB, InC>& in,
+                             Tuple3<OutA, OutB, OutC>* out) {
+  (obj->*method)(in.a, in.b, in.c, &out->a, &out->b, &out->c);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class OutA, class OutB, class OutC>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple4<InA, InB, InC, InD>& in,
+                             Tuple3<OutA, OutB, OutC>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, &out->a, &out->b, &out->c);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class InE, class OutA, class OutB, class OutC>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple5<InA, InB, InC, InD, InE>& in,
+                             Tuple3<OutA, OutB, OutC>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, in.e, &out->a, &out->b, &out->c);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class InE, class InF, class OutA, class OutB, class OutC>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple6<InA, InB, InC, InD, InE, InF>& in,
+                             Tuple3<OutA, OutB, OutC>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, in.e, in.f, &out->a, &out->b, &out->c);
+}
+
+// Dispatchers with 4 out params.
+
+template <class ObjT, class Method, class OutA, class OutB, class OutC,
+          class OutD>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple0& in,
+                             Tuple4<OutA, OutB, OutC, OutD>* out) {
+  (obj->*method)(&out->a, &out->b, &out->c, &out->d);
+}
+
+template <class ObjT, class Method, class InA, class OutA, class OutB,
+          class OutC, class OutD>
+inline void DispatchToMethod(ObjT* obj, Method method, const InA& in,
+                             Tuple4<OutA, OutB, OutC, OutD>* out) {
+  (obj->*method)(in, &out->a, &out->b, &out->c, &out->d);
+}
+
+template <class ObjT, class Method, class InA, class OutA, class OutB,
+          class OutC, class OutD>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple1<InA>& in,
+                             Tuple4<OutA, OutB, OutC, OutD>* out) {
+  (obj->*method)(in.a, &out->a, &out->b, &out->c, &out->d);
+}
+
+template <class ObjT, class Method, class InA, class InB, class OutA,
+          class OutB, class OutC, class OutD>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple2<InA, InB>& in,
+                             Tuple4<OutA, OutB, OutC, OutD>* out) {
+  (obj->*method)(in.a, in.b, &out->a, &out->b, &out->c, &out->d);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class OutA,
+          class OutB, class OutC, class OutD>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple3<InA, InB, InC>& in,
+                             Tuple4<OutA, OutB, OutC, OutD>* out) {
+  (obj->*method)(in.a, in.b, in.c, &out->a, &out->b, &out->c, &out->d);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class OutA, class OutB, class OutC, class OutD>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple4<InA, InB, InC, InD>& in,
+                             Tuple4<OutA, OutB, OutC, OutD>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, &out->a, &out->b, &out->c, &out->d);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class InE, class OutA, class OutB, class OutC, class OutD>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple5<InA, InB, InC, InD, InE>& in,
+                             Tuple4<OutA, OutB, OutC, OutD>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, in.e, &out->a, &out->b, &out->c,
+                 &out->d);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class InE, class InF, class OutA, class OutB, class OutC, class OutD>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple6<InA, InB, InC, InD, InE, InF>& in,
+                             Tuple4<OutA, OutB, OutC, OutD>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, in.e, in.f, &out->a, &out->b, &out->c,
+                 &out->d);
+}
+
+// Dispatchers with 5 out params.
+
+template <class ObjT, class Method, class OutA, class OutB, class OutC,
+          class OutD, class OutE>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple0& in,
+                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
+  (obj->*method)(&out->a, &out->b, &out->c, &out->d, &out->e);
+}
+
+template <class ObjT, class Method, class InA, class OutA, class OutB,
+          class OutC, class OutD, class OutE>
+inline void DispatchToMethod(ObjT* obj, Method method, const InA& in,
+                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
+  (obj->*method)(in, &out->a, &out->b, &out->c, &out->d, &out->e);
+}
+
+template <class ObjT, class Method, class InA, class OutA, class OutB,
+          class OutC, class OutD, class OutE>
+inline void DispatchToMethod(ObjT* obj, Method method, const Tuple1<InA>& in,
+                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
+  (obj->*method)(in.a, &out->a, &out->b, &out->c, &out->d, &out->e);
+}
+
+template <class ObjT, class Method, class InA, class InB, class OutA,
+          class OutB, class OutC, class OutD, class OutE>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple2<InA, InB>& in,
+                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
+  (obj->*method)(in.a, in.b, &out->a, &out->b, &out->c, &out->d, &out->e);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class OutA,
+          class OutB, class OutC, class OutD, class OutE>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple3<InA, InB, InC>& in,
+                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
+  (obj->*method)(in.a, in.b, in.c, &out->a, &out->b, &out->c, &out->d, &out->e);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class OutA, class OutB, class OutC, class OutD, class OutE>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple4<InA, InB, InC, InD>& in,
+                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, &out->a, &out->b, &out->c, &out->d,
+                 &out->e);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class InE, class OutA, class OutB, class OutC, class OutD, class OutE>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple5<InA, InB, InC, InD, InE>& in,
+                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, in.e, &out->a, &out->b, &out->c,
+                 &out->d, &out->e);
+}
+
+template <class ObjT, class Method, class InA, class InB, class InC, class InD,
+          class InE, class InF, class OutA, class OutB, class OutC, class OutD,
+          class OutE>
+inline void DispatchToMethod(ObjT* obj, Method method,
+                             const Tuple6<InA, InB, InC, InD, InE, InF>& in,
+                             Tuple5<OutA, OutB, OutC, OutD, OutE>* out) {
+  (obj->*method)(in.a, in.b, in.c, in.d, in.e, in.f, &out->a, &out->b, &out->c,
+                 &out->d, &out->e);
+}
+
+#endif  // BASE_TUPLE_H__
diff --git a/ipc/chromium/src/base/waitable_event.h b/ipc/chromium/src/base/waitable_event.h
new file mode 100644
index 0000000000..40ed103b01
--- /dev/null
+++ b/ipc/chromium/src/base/waitable_event.h
@@ -0,0 +1,173 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_WAITABLE_EVENT_H_
+#define BASE_WAITABLE_EVENT_H_
+
+#include "base/basictypes.h"
+
+#if defined(OS_WIN)
+#  include <windows.h>
+#endif
+
+#if defined(OS_POSIX)
+#  include <list>
+#  include <utility>
+#  include "base/condition_variable.h"
+#  include "base/lock.h"
+#  include "nsISupportsImpl.h"
+#endif
+
+#include "base/message_loop.h"
+
+namespace base {
+
+// This replaces INFINITE from Win32
+static const int kNoTimeout = -1;
+
+class TimeDelta;
+
+// A WaitableEvent can be a useful thread synchronization tool when you want to
+// allow one thread to wait for another thread to finish some work. For
+// non-Windows systems, this can only be used from within a single address
+// space.
+//
+// Use a WaitableEvent when you would otherwise use a Lock+ConditionVariable to
+// protect a simple boolean value.  However, if you find yourself using a
+// WaitableEvent in conjunction with a Lock to wait for a more complex state
+// change (e.g., for an item to be added to a queue), then you should probably
+// be using a ConditionVariable instead of a WaitableEvent.
+//
+// NOTE: On Windows, this class provides a subset of the functionality afforded
+// by a Windows event object.  This is intentional.  If you are writing Windows
+// specific code and you need other features of a Windows event, then you might
+// be better off just using an Windows event directly.
+class WaitableEvent {
+ public:
+  // If manual_reset is true, then to set the event state to non-signaled, a
+  // consumer must call the Reset method.  If this parameter is false, then the
+  // system automatically resets the event state to non-signaled after a single
+  // waiting thread has been released.
+  WaitableEvent(bool manual_reset, bool initially_signaled);
+
+  ~WaitableEvent();
+
+  // Put the event in the un-signaled state.
+  void Reset();
+
+  // Put the event in the signaled state.  Causing any thread blocked on Wait
+  // to be woken up.
+  void Signal();
+
+  // Returns true if the event is in the signaled state, else false.  If this
+  // is not a manual reset event, then this test will cause a reset.
+  bool IsSignaled();
+
+  // Wait indefinitely for the event to be signaled.  Returns true if the event
+  // was signaled, else false is returned to indicate that waiting failed.
+  bool Wait();
+
+  // Wait up until max_time has passed for the event to be signaled.  Returns
+  // true if the event was signaled.  If this method returns false, then it
+  // does not necessarily mean that max_time was exceeded.
+  bool TimedWait(const TimeDelta& max_time);
+
+#if defined(OS_WIN)
+  HANDLE handle() const { return handle_; }
+#endif
+
+  // Wait, synchronously, on multiple events.
+  //   waitables: an array of WaitableEvent pointers
+  //   count: the number of elements in @waitables
+  //
+  // returns: the index of a WaitableEvent which has been signaled.
+  //
+  // You MUST NOT delete any of the WaitableEvent objects while this wait is
+  // happening.
+  static size_t WaitMany(WaitableEvent** waitables, size_t count);
+
+  // For asynchronous waiting, see WaitableEventWatcher
+
+  // This is a private helper class. It's here because it's used by friends of
+  // this class (such as WaitableEventWatcher) to be able to enqueue elements
+  // of the wait-list
+  class Waiter {
+   public:
+    // Signal the waiter to wake up.
+    //
+    // Consider the case of a Waiter which is in multiple WaitableEvent's
+    // wait-lists. Each WaitableEvent is automatic-reset and two of them are
+    // signaled at the same time. Now, each will wake only the first waiter in
+    // the wake-list before resetting. However, if those two waiters happen to
+    // be the same object (as can happen if another thread didn't have a chance
+    // to dequeue the waiter from the other wait-list in time), two auto-resets
+    // will have happened, but only one waiter has been signaled!
+    //
+    // Because of this, a Waiter may "reject" a wake by returning false. In
+    // this case, the auto-reset WaitableEvent shouldn't act as if anything has
+    // been notified.
+    virtual bool Fire(WaitableEvent* signaling_event) = 0;
+
+    // Waiters may implement this in order to provide an extra condition for
+    // two Waiters to be considered equal. In WaitableEvent::Dequeue, if the
+    // pointers match then this function is called as a final check. See the
+    // comments in ~Handle for why.
+    virtual bool Compare(void* tag) = 0;
+  };
+
+ private:
+  friend class WaitableEventWatcher;
+
+#if defined(OS_WIN)
+  HANDLE handle_;
+#else
+  // On Windows, one can close a HANDLE which is currently being waited on. The
+  // MSDN documentation says that the resulting behaviour is 'undefined', but
+  // it doesn't crash. However, if we were to include the following members
+  // directly then, on POSIX, one couldn't use WaitableEventWatcher to watch an
+  // event which gets deleted. This mismatch has bitten us several times now,
+  // so we have a kernel of the WaitableEvent, which is reference counted.
+  // WaitableEventWatchers may then take a reference and thus match the Windows
+  // behaviour.
+  struct WaitableEventKernel final {
+   public:
+    NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WaitableEventKernel)
+    WaitableEventKernel(bool manual_reset, bool initially_signaled)
+        : manual_reset_(manual_reset), signaled_(initially_signaled) {}
+
+    bool Dequeue(Waiter* waiter, void* tag);
+
+    Lock lock_;
+    const bool manual_reset_;
+    bool signaled_;
+    std::list<Waiter*> waiters_;
+
+   protected:
+    ~WaitableEventKernel() {}
+  };
+
+  RefPtr<WaitableEventKernel> kernel_;
+
+  bool SignalAll();
+  bool SignalOne();
+  void Enqueue(Waiter* waiter);
+
+  // When dealing with arrays of WaitableEvent*, we want to sort by the address
+  // of the WaitableEvent in order to have a globally consistent locking order.
+  // In that case we keep them, in sorted order, in an array of pairs where the
+  // second element is the index of the WaitableEvent in the original,
+  // unsorted, array.
+  typedef std::pair<WaitableEvent*, size_t> WaiterAndIndex;
+  static size_t EnqueueMany(WaiterAndIndex* waitables, size_t count,
+                            Waiter* waiter);
+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(WaitableEvent);
+};
+
+}  // namespace base
+
+#endif  // BASE_WAITABLE_EVENT_H_
diff --git a/ipc/chromium/src/base/waitable_event_posix.cc b/ipc/chromium/src/base/waitable_event_posix.cc
new file mode 100644
index 0000000000..ad63876016
--- /dev/null
+++ b/ipc/chromium/src/base/waitable_event_posix.cc
@@ -0,0 +1,362 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/waitable_event.h"
+
+#include "base/condition_variable.h"
+#include "base/lock.h"
+#include "base/message_loop.h"
+
+// -----------------------------------------------------------------------------
+// A WaitableEvent on POSIX is implemented as a wait-list. Currently we don't
+// support cross-process events (where one process can signal an event which
+// others are waiting on). Because of this, we can avoid having one thread per
+// listener in several cases.
+//
+// The WaitableEvent maintains a list of waiters, protected by a lock. Each
+// waiter is either an async wait, in which case we have a Task and the
+// MessageLoop to run it on, or a blocking wait, in which case we have the
+// condition variable to signal.
+//
+// Waiting involves grabbing the lock and adding oneself to the wait list. Async
+// waits can be canceled, which means grabbing the lock and removing oneself
+// from the list.
+//
+// Waiting on multiple events is handled by adding a single, synchronous wait to
+// the wait-list of many events. An event passes a pointer to itself when
+// firing a waiter and so we can store that pointer to find out which event
+// triggered.
+// -----------------------------------------------------------------------------
+
+namespace base {
+
+// -----------------------------------------------------------------------------
+// This is just an abstract base class for waking the two types of waiters
+// -----------------------------------------------------------------------------
+WaitableEvent::WaitableEvent(bool manual_reset, bool initially_signaled)
+    : kernel_(new WaitableEventKernel(manual_reset, initially_signaled)) {}
+
+WaitableEvent::~WaitableEvent() {}
+
+void WaitableEvent::Reset() {
+  AutoLock locked(kernel_->lock_);
+  kernel_->signaled_ = false;
+}
+
+void WaitableEvent::Signal() {
+  AutoLock locked(kernel_->lock_);
+
+  if (kernel_->signaled_) return;
+
+  if (kernel_->manual_reset_) {
+    SignalAll();
+    kernel_->signaled_ = true;
+  } else {
+    // In the case of auto reset, if no waiters were woken, we remain
+    // signaled.
+    if (!SignalOne()) kernel_->signaled_ = true;
+  }
+}
+
+bool WaitableEvent::IsSignaled() {
+  AutoLock locked(kernel_->lock_);
+
+  const bool result = kernel_->signaled_;
+  if (result && !kernel_->manual_reset_) kernel_->signaled_ = false;
+  return result;
+}
+
+// -----------------------------------------------------------------------------
+// Synchronous waits
+
+// -----------------------------------------------------------------------------
+// This is an synchronous waiter. The thread is waiting on the given condition
+// variable and the fired flag in this object.
+// -----------------------------------------------------------------------------
+class SyncWaiter : public WaitableEvent::Waiter {
+ public:
+  SyncWaiter(ConditionVariable* cv, Lock* lock)
+      : fired_(false), cv_(cv), lock_(lock), signaling_event_(NULL) {}
+
+  bool Fire(WaitableEvent* signaling_event) override {
+    lock_->Acquire();
+    const bool previous_value = fired_;
+    fired_ = true;
+    if (!previous_value) signaling_event_ = signaling_event;
+    lock_->Release();
+
+    if (previous_value) return false;
+
+    cv_->Broadcast();
+
+    // SyncWaiters are stack allocated on the stack of the blocking thread.
+    return true;
+  }
+
+  WaitableEvent* signaled_event() const { return signaling_event_; }
+
+  // ---------------------------------------------------------------------------
+  // These waiters are always stack allocated and don't delete themselves. Thus
+  // there's no problem and the ABA tag is the same as the object pointer.
+  // ---------------------------------------------------------------------------
+  bool Compare(void* tag) override { return this == tag; }
+
+  // ---------------------------------------------------------------------------
+  // Called with lock held.
+  // ---------------------------------------------------------------------------
+  bool fired() const { return fired_; }
+
+  // ---------------------------------------------------------------------------
+  // During a TimedWait, we need a way to make sure that an auto-reset
+  // WaitableEvent doesn't think that this event has been signaled between
+  // unlocking it and removing it from the wait-list. Called with lock held.
+  // ---------------------------------------------------------------------------
+  void Disable() { fired_ = true; }
+
+ private:
+  bool fired_;
+  ConditionVariable* const cv_;
+  Lock* const lock_;
+  WaitableEvent* signaling_event_;  // The WaitableEvent which woke us
+};
+
+bool WaitableEvent::TimedWait(const TimeDelta& max_time) {
+  const TimeTicks end_time(TimeTicks::Now() + max_time);
+  const bool finite_time = max_time.ToInternalValue() >= 0;
+
+  kernel_->lock_.Acquire();
+  if (kernel_->signaled_) {
+    if (!kernel_->manual_reset_) {
+      // In this case we were signaled when we had no waiters. Now that
+      // someone has waited upon us, we can automatically reset.
+      kernel_->signaled_ = false;
+    }
+
+    kernel_->lock_.Release();
+    return true;
+  }
+
+  Lock lock;
+  lock.Acquire();
+  ConditionVariable cv(&lock);
+  SyncWaiter sw(&cv, &lock);
+
+  Enqueue(&sw);
+  kernel_->lock_.Release();
+  // We are violating locking order here by holding the SyncWaiter lock but not
+  // the WaitableEvent lock. However, this is safe because we don't lock @lock_
+  // again before unlocking it.
+
+  for (;;) {
+    const TimeTicks current_time(TimeTicks::Now());
+
+    if (sw.fired() || (finite_time && current_time >= end_time)) {
+      const bool return_value = sw.fired();
+
+      // We can't acquire @lock_ before releasing @lock (because of locking
+      // order), however, inbetween the two a signal could be fired and @sw
+      // would accept it, however we will still return false, so the signal
+      // would be lost on an auto-reset WaitableEvent. Thus we call Disable
+      // which makes sw::Fire return false.
+      sw.Disable();
+      lock.Release();
+
+      kernel_->lock_.Acquire();
+      kernel_->Dequeue(&sw, &sw);
+      kernel_->lock_.Release();
+
+      return return_value;
+    }
+
+    if (finite_time) {
+      const TimeDelta max_wait(end_time - current_time);
+      cv.TimedWait(max_wait);
+    } else {
+      cv.Wait();
+    }
+  }
+}
+
+bool WaitableEvent::Wait() { return TimedWait(TimeDelta::FromSeconds(-1)); }
+
+// -----------------------------------------------------------------------------
+
+// -----------------------------------------------------------------------------
+// Synchronous waiting on multiple objects.
+
+static bool  // StrictWeakOrdering
+cmp_fst_addr(const std::pair<WaitableEvent*, unsigned>& a,
+             const std::pair<WaitableEvent*, unsigned>& b) {
+  return a.first < b.first;
+}
+
+// static
+size_t WaitableEvent::WaitMany(WaitableEvent** raw_waitables, size_t count) {
+  DCHECK(count) << "Cannot wait on no events";
+
+  // We need to acquire the locks in a globally consistent order. Thus we sort
+  // the array of waitables by address. We actually sort a pairs so that we can
+  // map back to the original index values later.
+  std::vector<std::pair<WaitableEvent*, size_t> > waitables;
+  waitables.reserve(count);
+  for (size_t i = 0; i < count; ++i)
+    waitables.push_back(std::make_pair(raw_waitables[i], i));
+
+  DCHECK_EQ(count, waitables.size());
+
+  sort(waitables.begin(), waitables.end(), cmp_fst_addr);
+
+  // The set of waitables must be distinct. Since we have just sorted by
+  // address, we can check this cheaply by comparing pairs of consecutive
+  // elements.
+  for (size_t i = 0; i < waitables.size() - 1; ++i) {
+    DCHECK(waitables[i].first != waitables[i + 1].first);
+  }
+
+  Lock lock;
+  ConditionVariable cv(&lock);
+  SyncWaiter sw(&cv, &lock);
+
+  const size_t r = EnqueueMany(&waitables[0], count, &sw);
+  if (r) {
+    // One of the events is already signaled. The SyncWaiter has not been
+    // enqueued anywhere. EnqueueMany returns the count of remaining waitables
+    // when the signaled one was seen, so the index of the signaled event is
+    // @count - @r.
+    return waitables[count - r].second;
+  }
+
+  // At this point, we hold the locks on all the WaitableEvents and we have
+  // enqueued our waiter in them all.
+  lock.Acquire();
+  // Release the WaitableEvent locks in the reverse order
+  for (size_t i = 0; i < count; ++i) {
+    waitables[count - (1 + i)].first->kernel_->lock_.Release();
+  }
+
+  for (;;) {
+    if (sw.fired()) break;
+
+    cv.Wait();
+  }
+  lock.Release();
+
+  // The address of the WaitableEvent which fired is stored in the SyncWaiter.
+  WaitableEvent* const signaled_event = sw.signaled_event();
+  // This will store the index of the raw_waitables which fired.
+  size_t signaled_index = 0;
+
+  // Take the locks of each WaitableEvent in turn (except the signaled one) and
+  // remove our SyncWaiter from the wait-list
+  for (size_t i = 0; i < count; ++i) {
+    if (raw_waitables[i] != signaled_event) {
+      raw_waitables[i]->kernel_->lock_.Acquire();
+      // There's no possible ABA issue with the address of the SyncWaiter here
+      // because it lives on the stack. Thus the tag value is just the pointer
+      // value again.
+      raw_waitables[i]->kernel_->Dequeue(&sw, &sw);
+      raw_waitables[i]->kernel_->lock_.Release();
+    } else {
+      signaled_index = i;
+    }
+  }
+
+  return signaled_index;
+}
+
+// -----------------------------------------------------------------------------
+// If return value == 0:
+//   The locks of the WaitableEvents have been taken in order and the Waiter has
+//   been enqueued in the wait-list of each. None of the WaitableEvents are
+//   currently signaled
+// else:
+//   None of the WaitableEvent locks are held. The Waiter has not been enqueued
+//   in any of them and the return value is the index of the first WaitableEvent
+//   which was signaled, from the end of the array.
+// -----------------------------------------------------------------------------
+// static
+size_t WaitableEvent::EnqueueMany(std::pair<WaitableEvent*, size_t>* waitables,
+                                  size_t count, Waiter* waiter) {
+  if (!count) return 0;
+
+  waitables[0].first->kernel_->lock_.Acquire();
+  if (waitables[0].first->kernel_->signaled_) {
+    if (!waitables[0].first->kernel_->manual_reset_)
+      waitables[0].first->kernel_->signaled_ = false;
+    waitables[0].first->kernel_->lock_.Release();
+    return count;
+  }
+
+  const size_t r = EnqueueMany(waitables + 1, count - 1, waiter);
+  if (r) {
+    waitables[0].first->kernel_->lock_.Release();
+  } else {
+    waitables[0].first->Enqueue(waiter);
+  }
+
+  return r;
+}
+
+// -----------------------------------------------------------------------------
+
+// -----------------------------------------------------------------------------
+// Private functions...
+
+// -----------------------------------------------------------------------------
+// Wake all waiting waiters. Called with lock held.
+// -----------------------------------------------------------------------------
+bool WaitableEvent::SignalAll() {
+  bool signaled_at_least_one = false;
+
+  for (std::list<Waiter*>::iterator i = kernel_->waiters_.begin();
+       i != kernel_->waiters_.end(); ++i) {
+    if ((*i)->Fire(this)) signaled_at_least_one = true;
+  }
+
+  kernel_->waiters_.clear();
+  return signaled_at_least_one;
+}
+
+// ---------------------------------------------------------------------------
+// Try to wake a single waiter. Return true if one was woken. Called with lock
+// held.
+// ---------------------------------------------------------------------------
+bool WaitableEvent::SignalOne() {
+  for (;;) {
+    if (kernel_->waiters_.empty()) return false;
+
+    const bool r = (*kernel_->waiters_.begin())->Fire(this);
+    kernel_->waiters_.pop_front();
+    if (r) return true;
+  }
+}
+
+// -----------------------------------------------------------------------------
+// Add a waiter to the list of those waiting. Called with lock held.
+// -----------------------------------------------------------------------------
+void WaitableEvent::Enqueue(Waiter* waiter) {
+  kernel_->waiters_.push_back(waiter);
+}
+
+// -----------------------------------------------------------------------------
+// Remove a waiter from the list of those waiting. Return true if the waiter was
+// actually removed. Called with lock held.
+// -----------------------------------------------------------------------------
+bool WaitableEvent::WaitableEventKernel::Dequeue(Waiter* waiter, void* tag) {
+  for (std::list<Waiter*>::iterator i = waiters_.begin(); i != waiters_.end();
+       ++i) {
+    if (*i == waiter && (*i)->Compare(tag)) {
+      waiters_.erase(i);
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// -----------------------------------------------------------------------------
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/waitable_event_win.cc b/ipc/chromium/src/base/waitable_event_win.cc
new file mode 100644
index 0000000000..ca94c5cdd9
--- /dev/null
+++ b/ipc/chromium/src/base/waitable_event_win.cc
@@ -0,0 +1,81 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/waitable_event.h"
+
+#include <math.h>
+#include <windows.h>
+
+#include "base/logging.h"
+#include "base/time.h"
+
+namespace base {
+
+WaitableEvent::WaitableEvent(bool manual_reset, bool signaled)
+    : handle_(CreateEvent(NULL, manual_reset, signaled, NULL)) {
+  // We're probably going to crash anyways if this is ever NULL, so we might as
+  // well make our stack reports more informative by crashing here.
+  CHECK(handle_);
+}
+
+WaitableEvent::~WaitableEvent() { CloseHandle(handle_); }
+
+void WaitableEvent::Reset() { ResetEvent(handle_); }
+
+void WaitableEvent::Signal() { SetEvent(handle_); }
+
+bool WaitableEvent::IsSignaled() {
+  return TimedWait(TimeDelta::FromMilliseconds(0));
+}
+
+bool WaitableEvent::Wait() {
+  DWORD result = WaitForSingleObject(handle_, INFINITE);
+  // It is most unexpected that this should ever fail.  Help consumers learn
+  // about it if it should ever fail.
+  DCHECK(result == WAIT_OBJECT_0) << "WaitForSingleObject failed";
+  return result == WAIT_OBJECT_0;
+}
+
+bool WaitableEvent::TimedWait(const TimeDelta& max_time) {
+  DCHECK(max_time >= TimeDelta::FromMicroseconds(0));
+  // Be careful here.  TimeDelta has a precision of microseconds, but this API
+  // is in milliseconds.  If there are 5.5ms left, should the delay be 5 or 6?
+  // It should be 6 to avoid returning too early.
+  double timeout = ceil(max_time.InMillisecondsF());
+  DWORD result = WaitForSingleObject(handle_, static_cast<DWORD>(timeout));
+  switch (result) {
+    case WAIT_OBJECT_0:
+      return true;
+    case WAIT_TIMEOUT:
+      return false;
+  }
+  // It is most unexpected that this should ever fail.  Help consumers learn
+  // about it if it should ever fail.
+  NOTREACHED() << "WaitForSingleObject failed";
+  return false;
+}
+
+// static
+size_t WaitableEvent::WaitMany(WaitableEvent** events, size_t count) {
+  HANDLE handles[MAXIMUM_WAIT_OBJECTS];
+  CHECK(count <= MAXIMUM_WAIT_OBJECTS)
+  << "Can only wait on " << MAXIMUM_WAIT_OBJECTS << " with WaitMany";
+
+  for (size_t i = 0; i < count; ++i) handles[i] = events[i]->handle();
+
+  DWORD result =
+      WaitForMultipleObjects(count, handles,
+                             FALSE,      // don't wait for all the objects
+                             INFINITE);  // no timeout
+  if (result >= WAIT_OBJECT_0 + count) {
+    NOTREACHED() << "WaitForMultipleObjects failed: " << GetLastError();
+    return 0;
+  }
+
+  return result - WAIT_OBJECT_0;
+}
+
+}  // namespace base
diff --git a/ipc/chromium/src/base/win_util.cc b/ipc/chromium/src/base/win_util.cc
new file mode 100644
index 0000000000..611603f56e
--- /dev/null
+++ b/ipc/chromium/src/base/win_util.cc
@@ -0,0 +1,37 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/win_util.h"
+
+#include <map>
+#include <sddl.h>
+
+#include "base/logging.h"
+#include "base/string_util.h"
+
+namespace win_util {
+
+std::wstring FormatMessage(unsigned messageid) {
+  wchar_t* string_buffer = NULL;
+  ::FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
+                      FORMAT_MESSAGE_IGNORE_INSERTS,
+                  NULL, messageid, 0,
+                  reinterpret_cast<wchar_t*>(&string_buffer), 0, NULL);
+
+  std::wstring formatted_string;
+  if (string_buffer) {
+    formatted_string = string_buffer;
+    LocalFree(reinterpret_cast<HLOCAL>(string_buffer));
+  } else {
+    // The formating failed. simply convert the message value into a string.
+    SStringPrintf(&formatted_string, L"message number %d", messageid);
+  }
+  return formatted_string;
+}
+
+std::wstring FormatLastWin32Error() { return FormatMessage(GetLastError()); }
+
+}  // namespace win_util
diff --git a/ipc/chromium/src/base/win_util.h b/ipc/chromium/src/base/win_util.h
new file mode 100644
index 0000000000..b37411f60d
--- /dev/null
+++ b/ipc/chromium/src/base/win_util.h
@@ -0,0 +1,22 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_WIN_UTIL_H__
+#define BASE_WIN_UTIL_H__
+
+#include <windows.h>
+#include <aclapi.h>
+
+#include <string>
+
+namespace win_util {
+
+// Uses the last Win32 error to generate a human readable message string.
+std::wstring FormatLastWin32Error();
+
+}  // namespace win_util
+
+#endif  // BASE_WIN_UTIL_H__