Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/formats/mpeg/mpeg_audio_stream_parser_base.h

Index: media/formats/mpeg/mpeg_audio_stream_parser_base.h
diff --git a/media/formats/mpeg/mpeg_audio_stream_parser_base.h b/media/formats/mpeg/mpeg_audio_stream_parser_base.h
index febd814efed26224bbf42d94298b69fd4ea2a0f2..f0712380ef4421cbc9418949ece36ab14af49a1d 100644
--- a/media/formats/mpeg/mpeg_audio_stream_parser_base.h
+++ b/media/formats/mpeg/mpeg_audio_stream_parser_base.h
@@ -41,7 +41,7 @@ class MEDIA_EXPORT MPEGAudioStreamParserBase : public StreamParser {
             const EncryptedMediaInitDataCB& encrypted_media_init_data_cb,
             const NewMediaSegmentCB& new_segment_cb,
             const EndMediaSegmentCB& end_of_segment_cb,
-            const scoped_refptr<MediaLog>& media_log) override;
+            MediaLog* media_log) override;
   void Flush() override;
   bool Parse(const uint8_t* buf, int size) override;
 
@@ -85,7 +85,7 @@ class MEDIA_EXPORT MPEGAudioStreamParserBase : public StreamParser {
                                bool* metadata_frame,
                                std::vector<uint8_t>* extra_data) const = 0;
 
-  const scoped_refptr<MediaLog>& media_log() const { return media_log_; }
+  MediaLog* media_log() const { return media_log_; }
 
  private:
   enum State {
@@ -141,7 +141,7 @@ class MEDIA_EXPORT MPEGAudioStreamParserBase : public StreamParser {
   NewBuffersCB new_buffers_cb_;
   NewMediaSegmentCB new_segment_cb_;
   EndMediaSegmentCB end_of_segment_cb_;
-  scoped_refptr<MediaLog> media_log_;
+  MediaLog* media_log_;
 
   ByteQueue queue_;