media: Make GpuMemoryBuffers VideoFrame copies asynchronous.

media/renderers/default_renderer_factory.cc

Index: media/renderers/default_renderer_factory.cc
diff --git a/media/renderers/default_renderer_factory.cc b/media/renderers/default_renderer_factory.cc
index 5bd50121e74a82ca1f0db54419edd2b08ae47a4c..add6e15c9c8179efc8a2f64ae52e9477e941a49a 100644
--- a/media/renderers/default_renderer_factory.cc
+++ b/media/renderers/default_renderer_factory.cc
@@ -45,6 +45,7 @@ DefaultRendererFactory::~DefaultRendererFactory() {
 
 scoped_ptr<Renderer> DefaultRendererFactory::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(audio_renderer_sink);
@@ -86,8 +87,8 @@ scoped_ptr<Renderer> DefaultRendererFactory::CreateRenderer(
 #endif
 
   scoped_ptr<VideoRenderer> video_renderer(new VideoRendererImpl(
-      media_task_runner, video_renderer_sink, video_decoders.Pass(), true,
-      gpu_factories_, media_log_));
+      media_task_runner, worker_task_runner, video_renderer_sink,
+      video_decoders.Pass(), true, gpu_factories_, media_log_));
 
   // Create renderer.
   return scoped_ptr<Renderer>(new RendererImpl(