Revert of Add accelerated video decoder interface, VP8 and H.264 implementations and hook up to V4L2SVDA

content/common/gpu/media/vp8_picture.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 CONTENT_COMMON_GPU_MEDIA_VP8_PICTURE_H_
-#define CONTENT_COMMON_GPU_MEDIA_VP8_PICTURE_H_
-
-#include "base/memory/ref_counted.h"
-
-namespace content {
-
-class V4L2VP8Picture;
-
-class VP8Picture : public base::RefCounted<VP8Picture> {
- public:
-  VP8Picture();
-
-  virtual V4L2VP8Picture* AsV4L2VP8Picture();
-
- protected:
-  friend class base::RefCounted<VP8Picture>;
-  virtual ~VP8Picture();
-
-  DISALLOW_COPY_AND_ASSIGN(VP8Picture);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_GPU_MEDIA_VP8_PICTURE_H_