Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/renderers/video_renderer_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_RENDERERS_VIDEO_RENDERER_IMPL_H_
 #define MEDIA_RENDERERS_VIDEO_RENDERER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 42 matching lines @@
   // down the video thread may result in losing synchronization with audio.
   //
   // Setting |drop_frames_| to true causes the renderer to drop expired frames.
   VideoRendererImpl(
       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
       const scoped_refptr<base::TaskRunner>& worker_task_runner,
       VideoRendererSink* sink,
       const CreateVideoDecodersCB& create_video_decoders_cb,
       bool drop_frames,
       GpuVideoAcceleratorFactories* gpu_factories,
-      const scoped_refptr<MediaLog>& media_log);
+      MediaLog* media_log);
   ~VideoRendererImpl() override;
 
   // VideoRenderer implementation.
   void Initialize(DemuxerStream* stream,
                   CdmContext* cdm_context,
                   RendererClient* client,
                   const TimeSource::WallClockTimeCB& wall_clock_time_cb,
                   const PipelineStatusCB& init_cb) override;
   void Flush(const base::Closure& callback) override;
   void StartPlayingFrom(base::TimeDelta timestamp) override;
@@ skipping 127 matching lines @@
   base::Lock lock_;
 
   RendererClient* client_;
 
   // Provides video frames to VideoRendererImpl.
   std::unique_ptr<VideoFrameStream> video_frame_stream_;
 
   // Pool of GpuMemoryBuffers and resources used to create hardware frames.
   std::unique_ptr<GpuMemoryBufferVideoFramePool> gpu_memory_buffer_pool_;
 
-  scoped_refptr<MediaLog> media_log_;
+  MediaLog* media_log_;
 
   // Flag indicating low-delay mode.
   bool low_delay_;
 
   // Keeps track of whether we received the end of stream buffer and finished
   // rendering.
   bool received_end_of_stream_;
   bool rendered_end_of_stream_;
 
   // Important detail: being in kPlaying doesn't imply that video is being
@@ skipping 91 matching lines @@
   // want to discard video frames that might be received after the stream has
   // been reset.
   base::WeakPtrFactory<VideoRendererImpl> frame_callback_weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_VIDEO_RENDERER_IMPL_H_