media: Make GpuMemoryBuffers VideoFrame copies asynchronous.

media/mojo/services/mojo_renderer_factory.cc

 // Copyright 2014 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 "media/mojo/services/mojo_renderer_factory.h"
 
 #include "base/single_thread_task_runner.h"
 #include "media/mojo/interfaces/service_factory.mojom.h"
 #include "media/mojo/services/mojo_renderer_impl.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/interface_request.h"
 
 namespace media {
 
 MojoRendererFactory::MojoRendererFactory(
     interfaces::ServiceFactory* service_factory)
     : service_factory_(service_factory) {
   DCHECK(service_factory_);
 }
 
 MojoRendererFactory::~MojoRendererFactory() {
 }
 
 scoped_ptr<Renderer> MojoRendererFactory::CreateRenderer(
     const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
+    const scoped_refptr<base::TaskRunner>& /* worker_task_runner */,
     AudioRendererSink* /* audio_renderer_sink */,
     VideoRendererSink* /* video_renderer_sink */) {
   DCHECK(service_factory_);
 
   interfaces::RendererPtr mojo_renderer;
   service_factory_->CreateRenderer(mojo::GetProxy(&mojo_renderer));
 
   return scoped_ptr<Renderer>(
       new MojoRendererImpl(media_task_runner, mojo_renderer.Pass()));
 }
 
 }  // namespace media