Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/formats/webm/webm_cluster_parser.cc

 // 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.
 
 #include "media/formats/webm/webm_cluster_parser.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 27 matching lines @@
     int64_t timecode_scale,
     int audio_track_num,
     base::TimeDelta audio_default_duration,
     int video_track_num,
     base::TimeDelta video_default_duration,
     const WebMTracksParser::TextTracks& text_tracks,
     const std::set<int64_t>& ignored_tracks,
     const std::string& audio_encryption_key_id,
     const std::string& video_encryption_key_id,
     const AudioCodec audio_codec,
-    const scoped_refptr<MediaLog>& media_log)
+    MediaLog* media_log)
     : timecode_multiplier_(timecode_scale / 1000.0),
       ignored_tracks_(ignored_tracks),
       audio_encryption_key_id_(audio_encryption_key_id),
       video_encryption_key_id_(video_encryption_key_id),
       audio_codec_(audio_codec),
       parser_(kWebMIdCluster, this),
       cluster_start_time_(kNoTimestamp),
       audio_(audio_track_num, false, audio_default_duration, media_log),
       video_(video_track_num, true, video_default_duration, media_log),
       ready_buffer_upper_bound_(kNoDecodeTimestamp()),
@@ skipping 538 matching lines @@
         base::TimeDelta(),
         base::TimeDelta::FromMicroseconds(discard_padding / 1000)));
   }
 
   return track->AddBuffer(buffer);
 }
 
 WebMClusterParser::Track::Track(int track_num,
                                 bool is_video,
                                 base::TimeDelta default_duration,
-                                const scoped_refptr<MediaLog>& media_log)
+                                MediaLog* media_log)
     : track_num_(track_num),
       is_video_(is_video),
       default_duration_(default_duration),
       estimated_next_frame_duration_(kNoTimestamp),
       media_log_(media_log) {
   DCHECK(default_duration_ == kNoTimestamp ||
          default_duration_ > base::TimeDelta());
 }
 
 WebMClusterParser::Track::Track(const Track& other) = default;
@@ skipping 252 matching lines @@
 WebMClusterParser::FindTextTrack(int track_num) {
   const TextTrackMap::iterator it = text_track_map_.find(track_num);
 
   if (it == text_track_map_.end())
     return NULL;
 
   return &it->second;
 }
 
 }  // namespace media