Plumb decoded video pixel format from GPU process to renderer.

media/gpu/ipc/client/gpu_video_decode_accelerator_host.h

Index: media/gpu/ipc/client/gpu_video_decode_accelerator_host.h
diff --git a/media/gpu/ipc/client/gpu_video_decode_accelerator_host.h b/media/gpu/ipc/client/gpu_video_decode_accelerator_host.h
index c60d2b5ab4a7d2001ec0778de06cec421980a751..d89df5f5b02ce66cc0f97d61a6a93ce3e12ad9e3 100644
--- a/media/gpu/ipc/client/gpu_video_decode_accelerator_host.h
+++ b/media/gpu/ipc/client/gpu_video_decode_accelerator_host.h
@@ -49,6 +49,7 @@ class GpuVideoDecodeAcceleratorHost
   void Flush() override;
   void Reset() override;
   void Destroy() override;
+  VideoPixelFormat GetOutputFormat() const override;
 
   // gpu::CommandBufferProxyImpl::DeletionObserver implemetnation.
   void OnWillDeleteImpl() override;
@@ -66,7 +67,8 @@ class GpuVideoDecodeAcceleratorHost
   // process.  Should not be called directly.
   void OnInitializationComplete(bool success);
   void OnBitstreamBufferProcessed(int32_t bitstream_buffer_id);
-  void OnProvidePictureBuffer(uint32_t num_requested_buffers,
+  void OnProvidePictureBuffer(VideoPixelFormat format,
+                              uint32_t num_requested_buffers,
                               uint32_t textures_per_buffer,
                               const gfx::Size& dimensions,
                               uint32_t texture_target);
@@ -99,6 +101,8 @@ class GpuVideoDecodeAcceleratorHost
   // Requested dimensions of the buffer, from ProvidePictureBuffers().
   gfx::Size picture_buffer_dimensions_;
 
+  VideoPixelFormat picture_buffer_format_;
+
   // WeakPtr factory for posting tasks back to itself.
   base::WeakPtrFactory<GpuVideoDecodeAcceleratorHost> weak_this_factory_;