Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/formats/webm/webm_tracks_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_tracks_parser.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "media/base/media_util.h"
@@ skipping 27 matching lines @@
 
   int64_t mult = duration_in_ns / 1000;
   mult /= timecode_scale_in_us;
   if (mult == 0)
     return kNoTimestamp;
 
   mult = static_cast<double>(mult) * timecode_scale_in_us;
   return base::TimeDelta::FromMicroseconds(mult);
 }
 
-WebMTracksParser::WebMTracksParser(const scoped_refptr<MediaLog>& media_log,
-                                   bool ignore_text_tracks)
+WebMTracksParser::WebMTracksParser(MediaLog* media_log, bool ignore_text_tracks)
     : ignore_text_tracks_(ignore_text_tracks),
       media_log_(media_log),
       audio_client_(media_log),
       video_client_(media_log) {
   Reset();
 }
 
 WebMTracksParser::~WebMTracksParser() {}
 
 void WebMTracksParser::Reset() {
@@ skipping 305 matching lines @@
     } else {
       track_language_ = str;
     }
     return true;
   }
 
   return true;
 }
 
 }  // namespace media