Rename some PPB_VideoDecoder_Dev implementation types.

ppapi/thunk/ppb_video_decoder_api.h

-// Copyright (c) 2012 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 PPAPI_THUNK_VIDEO_DECODER_API_H_
-#define PPAPI_THUNK_VIDEO_DECODER_API_H_
-
-#include "base/memory/ref_counted.h"
-#include "ppapi/c/dev/ppb_video_decoder_dev.h"
-
-namespace ppapi {
-
-class TrackedCallback;
-
-namespace thunk {
-
-class PPB_VideoDecoder_API {
- public:
-  virtual ~PPB_VideoDecoder_API() {}
-
-  virtual int32_t Decode(const PP_VideoBitstreamBuffer_Dev* bitstream_buffer,
-                         scoped_refptr<TrackedCallback> callback) = 0;
-  virtual void AssignPictureBuffers(uint32_t no_of_buffers,
-                                    const PP_PictureBuffer_Dev* buffers) = 0;
-  virtual void ReusePictureBuffer(int32_t picture_buffer_id) = 0;
-  virtual int32_t Flush(scoped_refptr<TrackedCallback> callback) = 0;
-  virtual int32_t Reset(scoped_refptr<TrackedCallback> callback) = 0;
-  virtual void Destroy() = 0;
-};
-
-}  // namespace thunk
-}  // namespace ppapi
-
-#endif  // PPAPI_THUNK_VIDEO_DECODER_API_H_