Mac ÜC: Fix white page hangs

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 1425 matching lines @@
                     int /* minimum_percent */,
                     int /* maximum_percent */)
 
 // Notify the browser that this render process can or can't be suddenly
 // terminated.
 IPC_MESSAGE_CONTROL1(ViewHostMsg_SuddenTerminationChanged,
                      bool /* enabled */)
 
 IPC_STRUCT_BEGIN(ViewHostMsg_CompositorSurfaceBuffersSwapped_Params)
   IPC_STRUCT_MEMBER(bool, use_native_widget)
+  IPC_STRUCT_MEMBER(uint64, native_widget_token)
   IPC_STRUCT_MEMBER(int32, surface_id)
   IPC_STRUCT_MEMBER(uint64, surface_handle)
   IPC_STRUCT_MEMBER(int32, route_id)
   IPC_STRUCT_MEMBER(gfx::Size, size)
   IPC_STRUCT_MEMBER(float, scale_factor)
   IPC_STRUCT_MEMBER(int32, gpu_process_host_id)
   IPC_STRUCT_MEMBER(std::vector<ui::LatencyInfo>, latency_info)
 IPC_STRUCT_END()
 
 // This message is synthesized by GpuProcessHost to pass through a swap message
@@ skipping 242 matching lines @@
 // Since the browser keeps handles to the allocated transport DIBs, this
 // message is sent to tell the browser that it may release them when the
 // renderer is finished with them.
 IPC_MESSAGE_CONTROL1(ViewHostMsg_FreeTransportDIB,
                      TransportDIB::Id /* DIB id */)
 #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.