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diff --git a/ipc/chromium/src/base/command_line.h b/ipc/chromium/src/base/command_line.h
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+/* -*- 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 <map>
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+
+class InProcessBrowserTest;
+
+class CommandLine {
+ public:
+#if defined(XP_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);
+#else
+  // 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(XP_WIN)
+  // Returns the original command line string.
+  const std::wstring& command_line_string() const {
+    return command_line_string_;
+  }
+#else
+  // 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(XP_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(XP_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;
+
+#else
+  // 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_