Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/blink/webmediasource_impl.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_WEBMEDIASOURCE_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIASOURCE_IMPL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
-#include "media/base/media_log.h"
 #include "media/blink/media_blink_export.h"
 #include "third_party/WebKit/public/platform/WebMediaSource.h"
 
 namespace media {
 class ChunkDemuxer;
 
 class MEDIA_BLINK_EXPORT WebMediaSourceImpl
     : NON_EXPORTED_BASE(public blink::WebMediaSource) {
  public:
-  WebMediaSourceImpl(ChunkDemuxer* demuxer,
-                     const scoped_refptr<MediaLog>& media_log);
+  WebMediaSourceImpl(ChunkDemuxer* demuxer);
   ~WebMediaSourceImpl() override;
 
   // blink::WebMediaSource implementation.
   AddStatus AddSourceBuffer(const blink::WebString& type,
                             const blink::WebString& codecs,
                             blink::WebSourceBuffer** source_buffer) override;
   double Duration() override;
   void SetDuration(double duration) override;
   void MarkEndOfStream(EndOfStreamStatus status) override;
   void UnmarkEndOfStream() override;
 
  private:
   ChunkDemuxer* demuxer_;  // Owned by WebMediaPlayerImpl.
-  scoped_refptr<MediaLog> media_log_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaSourceImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIASOURCE_IMPL_H_