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

content/common/gpu/media/gpu_video_decode_accelerator.h

Index: content/common/gpu/media/gpu_video_decode_accelerator.h
diff --git a/content/common/gpu/media/gpu_video_decode_accelerator.h b/content/common/gpu/media/gpu_video_decode_accelerator.h
index be093025a9300e6e85eb2a0012be528afdc30485..5b1e0f2806271e5ad3f2320d5637d510d1a8a1e6 100644
--- a/content/common/gpu/media/gpu_video_decode_accelerator.h
+++ b/content/common/gpu/media/gpu_video_decode_accelerator.h
@@ -55,9 +55,12 @@ class GpuVideoDecodeAccelerator
   // The renderer process handle is valid as long as we have a channel between
   // GPU process and the renderer.
   void Initialize(const media::VideoCodecProfile profile,
-                  IPC::Message* init_done_msg);
+                  IPC::Message* init_done_msg,
+                  const scoped_refptr<base::MessageLoopProxy>& io_message_loop);
 
  private:
+  class GvdaMessageFilter;

[Ami GONE FROM CHROMIUM, 2013/08/26 17:20:03]

Since this is scoped inside the class no need for "Gvda" in the name.

[wuchengli, 2013/08/27 12:32:24]

Done.

+
   // Handlers for IPC messages.
   void OnDecode(base::SharedMemoryHandle handle, int32 id, uint32 size);
   void OnAssignPictureBuffers(
@@ -91,6 +94,8 @@ class GpuVideoDecodeAccelerator
   // The texture target as requested by ProvidePictureBuffers().
   uint32 texture_target_;
 
+  scoped_ptr<GvdaMessageFilter> filter_;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(GpuVideoDecodeAccelerator);
 };