Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/ffmpeg_audio_decoder.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 MEDIA_FILTERS_FFMPEG_AUDIO_DECODER_H_
 #define MEDIA_FILTERS_FFMPEG_AUDIO_DECODER_H_
 
 #include <list>
 #include <memory>
 
@@ skipping 16 matching lines @@
 
 namespace media {
 
 class AudioDiscardHelper;
 class DecoderBuffer;
 
 class MEDIA_EXPORT FFmpegAudioDecoder : public AudioDecoder {
  public:
   FFmpegAudioDecoder(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-      const scoped_refptr<MediaLog>& media_log);
+      MediaLog* media_log);
   ~FFmpegAudioDecoder() override;
 
   // AudioDecoder implementation.
   std::string GetDisplayName() const override;
   void Initialize(const AudioDecoderConfig& config,
                   CdmContext* cdm_context,
                   const InitCB& init_cb,
                   const OutputCB& output_cb) override;
   void Decode(const scoped_refptr<DecoderBuffer>& buffer,
               const DecodeCB& decode_cb) override;
@@ skipping 60 matching lines @@
   std::unique_ptr<AVCodecContext, ScopedPtrAVFreeContext> codec_context_;
   std::unique_ptr<AVFrame, ScopedPtrAVFreeFrame> av_frame_;
 
   AudioDecoderConfig config_;
 
   // AVSampleFormat initially requested; not Chrome's SampleFormat.
   int av_sample_format_;
 
   std::unique_ptr<AudioDiscardHelper> discard_helper_;
 
-  scoped_refptr<MediaLog> media_log_;
+  MediaLog* media_log_;
 
   scoped_refptr<AudioBufferMemoryPool> pool_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(FFmpegAudioDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_AUDIO_DECODER_H_