[Chromecast] Upgrade to new CMA backend API

chromecast/media/cma/base/cast_decoder_buffer_impl.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 CHROMECAST_MEDIA_CMA_BASE_CAST_DECODER_BUFFER_IMPL_H_
 #define CHROMECAST_MEDIA_CMA_BASE_CAST_DECODER_BUFFER_IMPL_H_
 
 #include "chromecast/public/media/cast_decoder_buffer.h"
 #include "chromecast/media/cma/base/decoder_buffer_base.h"
 
@@ skipping 24 matching lines @@
 
   // Returns the decrypt configuration.
   // Returns NULL if the buffer has no decrypt info.
   const CastDecryptConfig* decrypt_config() const override;
 
   // Indicate if this is a special frame that indicates the end of the stream.
   // If true, functions to access the frame content cannot be called.
   bool end_of_stream() const override;
 
   const scoped_refptr<DecoderBufferBase>& buffer() const;
+  void set_buffer(const scoped_refptr<DecoderBufferBase>& buffer);
 
  private:
   scoped_refptr<DecoderBufferBase> buffer_;
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_MEDIA_CMA_BASE_CAST_DECODER_BUFFER_BASE_H_