Support multiple video decoders and encoders

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 e59a76fb5c35169dd4b0fab8cb448e9bc02a46b3..c6245a3ae017779b755ed3ff629fefc5ec1ba755 100644
--- a/content/common/gpu/media/gpu_video_decode_accelerator.h
+++ b/content/common/gpu/media/gpu_video_decode_accelerator.h
@@ -59,8 +59,9 @@ class GpuVideoDecodeAccelerator
   // Function to delegate sending to actual sender.
   bool Send(IPC::Message* message) override;
 
-  // Initialize the accelerator with the given profile and send the
-  // |init_done_msg| when done.
+  // Prepare all appropriate platform-specific VDAs and send the
+  // |init_done_msg| when initialize one of accelerators with |profile|

[Pawel Osciak, 2014/12/30 06:14:38]

We send the message always, just with a different result depending on the
outcome.

[henryhsu, 2014/12/30 14:40:51]

Done.

+  // successfully.
   void Initialize(const media::VideoCodecProfile profile,
                   IPC::Message* init_done_msg);
 
@@ -70,6 +71,11 @@ class GpuVideoDecodeAccelerator
   // We only allow self-delete, from OnWillDestroyStub(), after cleanup there.
   ~GpuVideoDecodeAccelerator() override;
 
+  // Initialize VDA for |profile|. Return true when initialization succeeded
+  // and filter_ is passed to GpuCommandBufferStube channel only if we can
+  // decode on IO thread.
+  bool InitializeDecoder(media::VideoCodecProfile profile);
+
   // Handlers for IPC messages.
   void OnDecode(base::SharedMemoryHandle handle, int32 id, uint32 size);
   void OnAssignPictureBuffers(const std::vector<int32>& buffer_ids,