Run VDA::Decode on GPU IO thread if VDA supports it.

content/common/gpu/gpu_channel.cc

 // 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.
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include "content/common/gpu/gpu_channel.h"
 
@@ skipping 967 matching lines @@
                    messages_processed_));
   }
 }
 
 void GpuChannel::CacheShader(const std::string& key,
                              const std::string& shader) {
   gpu_channel_manager_->Send(
       new GpuHostMsg_CacheShader(client_id_, key, shader));
 }
 
+void GpuChannel::AddFilter(IPC::ChannelProxy::MessageFilter* filter) {
+  channel_->AddFilter(filter);
+}
+
+void GpuChannel::RemoveFilter(IPC::ChannelProxy::MessageFilter* filter) {
+  channel_->RemoveFilter(filter);
+}
+
 }  // namespace content