Implement proper synchronization between HW video decode IPC and CommandBuffer.

content/renderer/gpu/gpu_channel_host.cc

 // Copyright (c) 2011 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.
 
 #include "content/renderer/gpu/gpu_channel_host.h"
 
 #include "content/common/child_process.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/renderer/gpu/command_buffer_proxy.h"
 #include "content/renderer/gpu/gpu_surface_proxy.h"
@@ skipping 42 matching lines @@
   state_ = kLost;
 }
 
 bool GpuChannelHost::OnMessageReceived(const IPC::Message& message) {
   DCHECK(message.routing_id() != MSG_ROUTING_CONTROL);
 
   // The object to which the message is addressed might have been destroyed.
   // This is expected, for example an asynchronous SwapBuffers notification
   // to a command buffer proxy that has since been destroyed. This function
   // fails silently in that case.
+  if (gpu_video_service_host_->OnMessageReceived(message))
+    return true;
   return router_.RouteMessage(message);
 }
 
 void GpuChannelHost::OnChannelConnected(int32 peer_pid) {
-  // When the channel is connected we create a GpuVideoServiceHost and add it
-  // as a message filter.
-  channel_->AddFilter(gpu_video_service_host_.get());
   channel_->AddFilter(transport_texture_service_.get());
+  gpu_video_service_host_->set_channel(channel_.get());
 }
 
 void GpuChannelHost::OnChannelError() {
   state_ = kLost;
 
   // Channel is invalid and will be reinitialized if this host is requested
   // again.
   channel_.reset();
 
   // Inform all the proxies that an error has occured. This will be reported via
@@ skipping 119 matching lines @@
 
 void GpuChannelHost::DestroySurface(GpuSurfaceProxy* surface) {
 #if defined(ENABLE_GPU)
   Send(new GpuChannelMsg_DestroySurface(surface->route_id()));
   if (router_.ResolveRoute(surface->route_id()))
     router_.RemoveRoute(surface->route_id());
 
   delete surface;
 #endif
 }