Plumb decoded video pixel format from GPU process to renderer.

media/filters/gpu_video_decoder.h

Index: media/filters/gpu_video_decoder.h
diff --git a/media/filters/gpu_video_decoder.h b/media/filters/gpu_video_decoder.h
index d5488406363b487fae909dd92bdf974928f685ef..159381bfab3a3d70001b319f3b8c1970ab462527 100644
--- a/media/filters/gpu_video_decoder.h
+++ b/media/filters/gpu_video_decoder.h
@@ -67,6 +67,7 @@ class MEDIA_EXPORT GpuVideoDecoder
   // VideoDecodeAccelerator::Client implementation.
   void NotifyInitializationComplete(bool success) override;
   void ProvidePictureBuffers(uint32_t count,
+                             VideoPixelFormat format,
                              uint32_t textures_per_buffer,
                              const gfx::Size& size,
                              uint32_t texture_target) override;
@@ -195,6 +196,9 @@ class MEDIA_EXPORT GpuVideoDecoder
   // The texture target used for decoded pictures.
   uint32_t decoder_texture_target_;
 
+  // The pixel format used for decoded pictures.
+  VideoPixelFormat pixel_format_;
+
   struct BufferData {
     BufferData(int32_t bbid,
                base::TimeDelta ts,