Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/blink/webmediaplayer_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_WEBMEDIAPLAYER_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 82 matching lines @@
  public:
   // Constructs a WebMediaPlayer implementation using Chromium's media stack.
   // |delegate| and |renderer_factory| must not be null.
   WebMediaPlayerImpl(
       blink::WebLocalFrame* frame,
       blink::WebMediaPlayerClient* client,
       blink::WebMediaPlayerEncryptedMediaClient* encrypted_client,
       WebMediaPlayerDelegate* delegate,
       std::unique_ptr<RendererFactory> renderer_factory,
       linked_ptr<UrlIndex> url_index,
-      const WebMediaPlayerParams& params);
+      std::unique_ptr<WebMediaPlayerParams> params);
   ~WebMediaPlayerImpl() override;
 
   void Load(LoadType load_type,
             const blink::WebMediaPlayerSource& source,
             CORSMode cors_mode) override;
 
   // Playback controls.
   void Play() override;
   void Pause() override;
   bool SupportsSave() const override;
@@ skipping 360 matching lines @@
 
   // Preload state for when |data_source_| is created after setPreload().
   MultibufferDataSource::Preload preload_;
 
   // Task runner for posting tasks on Chrome's main thread. Also used
   // for DCHECKs so methods calls won't execute in the wrong thread.
   const scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
 
   scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
   scoped_refptr<base::TaskRunner> worker_task_runner_;
-  scoped_refptr<MediaLog> media_log_;
+  std::unique_ptr<MediaLog> media_log_;
 
   // |pipeline_controller_| owns an instance of Pipeline.
   PipelineController pipeline_controller_;
 
   // The LoadType passed in the |load_type| parameter of the load() call.
   LoadType load_type_;
 
   // Cache of metadata for answering hasAudio(), hasVideo(), and naturalSize().
   PipelineMetadata pipeline_metadata_;
 
@@ skipping 229 matching lines @@
   base::CancelableCallback<void(base::TimeTicks)> frame_time_report_cb_;
 
   bool initial_video_height_recorded_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_