Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/formats/webm/webm_tracks_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_TRACKS_PARSER_H_
 #define MEDIA_FORMATS_WEBM_WEBM_TRACKS_PARSER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 13 matching lines @@
 #include "media/formats/webm/webm_audio_client.h"
 #include "media/formats/webm/webm_content_encodings_client.h"
 #include "media/formats/webm/webm_parser.h"
 #include "media/formats/webm/webm_video_client.h"
 
 namespace media {
 
 // Parser for WebM Tracks element.
 class MEDIA_EXPORT WebMTracksParser : public WebMParserClient {
  public:
-  WebMTracksParser(const scoped_refptr<MediaLog>& media_log,
-                   bool ignore_text_tracks);
+  WebMTracksParser(MediaLog* media_log, bool ignore_text_tracks);
   ~WebMTracksParser() override;
 
   // Parses a WebM Tracks element in |buf|.
   //
   // Returns -1 if the parse fails.
   // Returns 0 if more data is needed.
   // Returns the number of bytes parsed on success.
   int Parse(const uint8_t* buf, int size);
 
   int64_t audio_track_num() const { return audio_track_num_; }
@@ skipping 73 matching lines @@
 
   int64_t audio_track_num_;
   int64_t audio_default_duration_;
   int64_t video_track_num_;
   int64_t video_default_duration_;
   bool ignore_text_tracks_;
   TextTracks text_tracks_;
   std::set<int64_t> ignored_tracks_;
   std::string audio_encryption_key_id_;
   std::string video_encryption_key_id_;
-  scoped_refptr<MediaLog> media_log_;
+  MediaLog* media_log_;
 
   WebMAudioClient audio_client_;
   AudioDecoderConfig audio_decoder_config_;
 
   WebMVideoClient video_client_;
   VideoDecoderConfig video_decoder_config_;
 
   int detected_audio_track_count_;
   int detected_video_track_count_;
   int detected_text_track_count_;
   std::unique_ptr<MediaTracks> media_tracks_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMTracksParser);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_WEBM_WEBM_TRACKS_PARSER_H_