Revert of Plumb decoded video pixel format from GPU process to renderer.

media/gpu/v4l2_slice_video_decode_accelerator.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_GPU_V4L2_SLICE_VIDEO_DECODE_ACCELERATOR_H_
 #define MEDIA_GPU_V4L2_SLICE_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <linux/videodev2.h>
 #include <stddef.h>
 #include <stdint.h>
@@ skipping 43 matching lines @@
                               const std::vector<gfx::GpuMemoryBufferHandle>&
                                   gpu_memory_buffer_handles) override;
   void ReusePictureBuffer(int32_t picture_buffer_id) override;
   void Flush() override;
   void Reset() override;
   void Destroy() override;
   bool TryToSetupDecodeOnSeparateThread(
       const base::WeakPtr<Client>& decode_client,
       const scoped_refptr<base::SingleThreadTaskRunner>& decode_task_runner)
       override;
+  media::VideoPixelFormat GetOutputFormat() const override;
 
   static media::VideoDecodeAccelerator::SupportedProfiles
   GetSupportedProfiles();
 
  private:
   class V4L2H264Accelerator;
   class V4L2VP8Accelerator;
 
   // Record for input buffers.
   struct InputRecord {
@@ skipping 388 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(V4L2SliceVideoDecodeAccelerator);
 };
 
 class V4L2H264Picture;
 class V4L2VP8Picture;
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_V4L2_SLICE_VIDEO_DECODE_ACCELERATOR_H_