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

content/common/gpu/media/gpu_video_decode_accelerator.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.
 
 #include "content/common/gpu/media/gpu_video_decode_accelerator.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 45 matching lines @@
 
 GpuVideoDecodeAccelerator::GpuVideoDecodeAccelerator(int32 host_route_id,
                                                      GpuCommandBufferStub* stub)
     : init_done_msg_(NULL),
       host_route_id_(host_route_id),
       stub_(stub),
       texture_target_(0) {
   DCHECK(stub_);
   stub_->AddDestructionObserver(this);
   stub_->channel()->AddRoute(host_route_id_, this);
+  stub_->channel()->AddMessageFilterRoute(host_route_id_, this);
   make_context_current_ =
       base::Bind(&MakeDecoderContextCurrent, stub_->AsWeakPtr());
 }
 
 GpuVideoDecodeAccelerator::~GpuVideoDecodeAccelerator() {
   DCHECK(stub_);
   if (video_decode_accelerator_)
     video_decode_accelerator_.release()->Destroy();
 
   stub_->channel()->RemoveRoute(host_route_id_);
+  stub_->channel()->RemoveMessageFilterRoute(host_route_id_);
   stub_->RemoveDestructionObserver(this);
 }
 
 bool GpuVideoDecodeAccelerator::OnMessageReceived(const IPC::Message& msg) {
   DCHECK(stub_);
   if (!video_decode_accelerator_)
     return false;
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(GpuVideoDecodeAccelerator, msg)
     IPC_MESSAGE_HANDLER(AcceleratedVideoDecoderMsg_Decode, OnDecode)
@@ skipping 245 matching lines @@
 void GpuVideoDecodeAccelerator::OnWillDestroyStub() {
   delete this;
 }
 
 bool GpuVideoDecodeAccelerator::Send(IPC::Message* message) {
   DCHECK(stub_);
   return stub_->channel()->Send(message);
 }
 
 }  // namespace content