Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/formats/webm/webm_stream_parser.h

 // Copyright 2014 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_FORMATS_WEBM_WEBM_STREAM_PARSER_H_
 #define MEDIA_FORMATS_WEBM_WEBM_STREAM_PARSER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 17 matching lines @@
   ~WebMStreamParser() override;
 
   // StreamParser implementation.
   void Init(const InitCB& init_cb,
             const NewConfigCB& config_cb,
             const NewBuffersCB& new_buffers_cb,
             bool ignore_text_tracks,
             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;
 
  private:
   enum State {
     kWaitingForInit,
     kParsingHeaders,
     kParsingClusters,
     kError
   };
@@ skipping 24 matching lines @@
 
   State state_;
   InitCB init_cb_;
   NewConfigCB config_cb_;
   NewBuffersCB new_buffers_cb_;
   bool ignore_text_tracks_;
   EncryptedMediaInitDataCB encrypted_media_init_data_cb_;
 
   NewMediaSegmentCB new_segment_cb_;
   EndMediaSegmentCB end_of_segment_cb_;
-  scoped_refptr<MediaLog> media_log_;
+  MediaLog* media_log_;
 
   bool unknown_segment_size_;
 
   std::unique_ptr<WebMClusterParser> cluster_parser_;
   ByteQueue byte_queue_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMStreamParser);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_WEBM_WEBM_STREAM_PARSER_H_