Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/blink/multibuffer_data_source.h

 // Copyright 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_BLINK_MULTIBUFFER_DATA_SOURCE_H_
 #define MEDIA_BLINK_MULTIBUFFER_DATA_SOURCE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 213 matching lines @@
   // This variable holds the value of the preload attribute for the video
   // element.
   Preload preload_;
 
   // Bitrate of the content, 0 if unknown.
   int bitrate_;
 
   // Current playback rate.
   double playback_rate_;
 
-  scoped_refptr<MediaLog> media_log_;
+  MediaLog* media_log_;
 
   // Host object to report buffered byte range changes to.
   BufferedDataSourceHost* host_;
 
   DownloadingCB downloading_cb_;
 
   // The original URL of the first response. If the request is redirected to
   // another URL it is the URL after redirected. If the response is generated in
   // a Service Worker this URL is empty. MultibufferDataSource checks the
   // original URL of each successive response. If the origin URL of it is
   // different from the original URL of the first response, it is treated
   // as an error.
   GURL response_original_url_;
 
   // Disallow rebinding WeakReference ownership to a different thread by keeping
   // a persistent reference. This avoids problems with the thread-safety of
   // reaching into this class from multiple threads to attain a WeakPtr.
   base::WeakPtr<MultibufferDataSource> weak_ptr_;
   base::WeakPtrFactory<MultibufferDataSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MultibufferDataSource);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_MULTIBUFFER_DATA_SOURCE_H_