Plumb decoded video pixel format from GPU process to renderer.

media/gpu/ipc/client/gpu_video_decode_accelerator_host.cc

Index: media/gpu/ipc/client/gpu_video_decode_accelerator_host.cc
diff --git a/media/gpu/ipc/client/gpu_video_decode_accelerator_host.cc b/media/gpu/ipc/client/gpu_video_decode_accelerator_host.cc
index 0d3d0683d88f4d34ff27335d9f1502d1f82059f8..c78c6450bb213bb7fa4d1e9d0353f394865c4d64 100644
--- a/media/gpu/ipc/client/gpu_video_decode_accelerator_host.cc
+++ b/media/gpu/ipc/client/gpu_video_decode_accelerator_host.cc
@@ -180,6 +180,10 @@ void GpuVideoDecodeAcceleratorHost::Destroy() {
   delete this;
 }
 
+VideoPixelFormat GpuVideoDecodeAcceleratorHost::GetOutputFormat() const {
+  return picture_buffer_format_;
+}
+
 void GpuVideoDecodeAcceleratorHost::OnWillDeleteImpl() {
   DCHECK(CalledOnValidThread());
   impl_ = NULL;
@@ -219,12 +223,14 @@ void GpuVideoDecodeAcceleratorHost::OnBitstreamBufferProcessed(
 }
 
 void GpuVideoDecodeAcceleratorHost::OnProvidePictureBuffer(
+    VideoPixelFormat format,
     uint32_t num_requested_buffers,
     uint32_t textures_per_buffer,
     const gfx::Size& dimensions,
     uint32_t texture_target) {
   DCHECK(CalledOnValidThread());
   picture_buffer_dimensions_ = dimensions;
+  picture_buffer_format_ = format;
 
   const int kMaxVideoPlanes = 4;
   if (textures_per_buffer > kMaxVideoPlanes) {