Enable sending MessagePorts to a different renderer (Chromium side)

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 735 matching lines @@
   // When sent to the browser, this is the routing ID of the source frame in
   // the source process.  The browser replaces it with the routing ID of the
   // equivalent (swapped out) frame in the destination process.
   IPC_STRUCT_MEMBER(int, source_routing_id)
 
   // The origin of the source frame.
   IPC_STRUCT_MEMBER(string16, source_origin)
 
   // The origin for the message's target.
   IPC_STRUCT_MEMBER(string16, target_origin)
+
+  // Information about the MessagePorts this message contains.
+  IPC_STRUCT_MEMBER(std::vector<int>, message_port_ids)
+  IPC_STRUCT_MEMBER(std::vector<int>, new_routing_ids)
 IPC_STRUCT_END()
 
 // Messages sent from the browser to the renderer.
 
 // Tells the renderer to cancel an opened date/time dialog.
 IPC_MESSAGE_ROUTED0(ViewMsg_CancelDateTimeDialog)
 
 // Get all savable resource links from current webpage, include main
 // frame and sub-frame.
 IPC_MESSAGE_ROUTED1(ViewMsg_GetAllSavableResourceLinksForCurrentPage,
@@ skipping 1598 matching lines @@
 // synchronously (see crbug.com/120597). This IPC message sends the character
 // bounds after every composition change to always have correct bound info.
 IPC_MESSAGE_ROUTED2(ViewHostMsg_ImeCompositionRangeChanged,
                     gfx::Range /* composition range */,
                     std::vector<gfx::Rect> /* character bounds */)
 #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.