Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/stream_parser_factory.h

 // Copyright (c) 2013 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_FILTERS_STREAM_PARSER_FACTORY_H_
 #define MEDIA_FILTERS_STREAM_PARSER_FACTORY_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 14 matching lines @@
 
   // Creates a new StreamParser object if the specified |type| and |codecs| list
   // are supported. |media_log| can be used to report errors if there is
   // something wrong with |type| or the codec IDs in |codecs|.
   // Returns a new StreamParser object if |type| and all codecs listed in
   //   |codecs| are supported.
   // Returns NULL otherwise.
   static std::unique_ptr<StreamParser> Create(
       const std::string& type,
       const std::vector<std::string>& codecs,
-      const scoped_refptr<MediaLog>& media_log);
+      MediaLog* media_log);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_STREAM_PARSER_FACTORY_H_