diff -r 000000000000 -r 6474c204b198 ipc/chromium/src/base/debug_on_start.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/chromium/src/base/debug_on_start.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,67 @@
+// 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.
+
+// Define the necessary code and global data to look for kDebugOnStart command
+// line argument. When the command line argument is detected, it invokes the
+// debugger, if no system-wide debugger is registered, a debug break is done.
+
+#ifndef BASE_DEBUG_ON_START_H_
+#define BASE_DEBUG_ON_START_H_
+
+#include "base/basictypes.h"
+
+// This only works on MSVC.
+#if defined(COMPILER_MSVC)
+
+#ifndef DECLSPEC_SELECTANY
+#define DECLSPEC_SELECTANY  __declspec(selectany)
+#endif
+
+// Debug on start functions and data.
+class DebugOnStart {
+ public:
+  // Expected function type in the .CRT$XI* section.
+  // Note: See VC\crt\src\internal.h for reference.
+  typedef int  (__cdecl *PIFV)(void);
+
+  // Looks at the command line for kDebugOnStart argument. If found, it invokes
+  // the debugger, if this fails, it crashes.
+  static int __cdecl Init();
+
+  // Returns true if the 'argument' is present in the 'command_line'. It does
+  // not use the CRT, only Kernel32 functions.
+  static bool FindArgument(wchar_t* command_line, const wchar_t* argument);
+};
+
+// Set the function pointer to our function to look for a crash on start. The
+// XIB section is started pretty early in the program initialization so in
+// theory it should be called before any user created global variable
+// initialization code and CRT initialization code.
+// Note: See VC\crt\src\defsects.inc and VC\crt\src\crt0.c for reference.
+#ifdef _WIN64
+
+// "Fix" the segment. On x64, the .CRT segment is merged into the .rdata segment
+// so it contains const data only.
+#pragma const_seg(push, ".CRT$XIB")
+// Declare the pointer so the CRT will find it.
+extern const DebugOnStart::PIFV debug_on_start;
+DECLSPEC_SELECTANY const DebugOnStart::PIFV debug_on_start =
+    &DebugOnStart::Init;
+// Fix back the segment.
+#pragma const_seg(pop)
+
+#else  // _WIN64
+
+// "Fix" the segment. On x86, the .CRT segment is merged into the .data segment
+// so it contains non-const data only.
+#pragma data_seg(push, ".CRT$XIB")
+// Declare the pointer so the CRT will find it.
+DECLSPEC_SELECTANY DebugOnStart::PIFV debug_on_start = &DebugOnStart::Init;
+// Fix back the segment.
+#pragma data_seg(pop)
+
+#endif  // _WIN64
+#endif  // defined(OS_WIN)
+
+#endif  // BASE_DEBUG_ON_START_H_