Store the callstack of the IPC sender of ViewMsg_New

content/common/view_messages.h

 // 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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
@@ skipping 514 matching lines @@
   IPC_STRUCT_MEMBER(ViewMsg_Resize_Params, initial_size)
 
   // Whether to enable auto-resize.
   IPC_STRUCT_MEMBER(bool, enable_auto_resize)
 
   // The minimum size to layout the page if auto-resize is enabled.
   IPC_STRUCT_MEMBER(gfx::Size, min_size)
 
   // The maximum size to layout the page if auto-resize is enabled.
   IPC_STRUCT_MEMBER(gfx::Size, max_size)
+
+  // Stores the callstack of the sender. Temporary only to help debug
+  // http://crbug.com/464633.
+  IPC_STRUCT_MEMBER(std::vector<unsigned long>, debug_info)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(ViewMsg_PostMessage_Params)
   // Whether the data format is supplied as serialized script value, or as
   // a simple string. If it is a raw string, must be converted from string to a
   // WebSerializedScriptValue in renderer.
   IPC_STRUCT_MEMBER(bool, is_data_raw_string)
   // The serialized script value.
   IPC_STRUCT_MEMBER(base::string16, data)
   // When sent to the browser, this is the routing ID of the source frame in
@@ skipping 1136 matching lines @@
 // cached by the OS. Please see RenderMessageFilter::OnPreCacheFontCharacters
 // for details.
 IPC_SYNC_MESSAGE_CONTROL2_0(ViewHostMsg_PreCacheFontCharacters,
                             LOGFONT /* font_data */,
                             base::string16 /* characters */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.