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diff --git a/ipc/chromium/src/base/compiler_specific.h b/ipc/chromium/src/base/compiler_specific.h
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+++ b/ipc/chromium/src/base/compiler_specific.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.
+
+#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_