Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/mojo/services/mojo_media_client.h

 // Copyright 2014 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_MOJO_SERVICES_MOJO_MEDIA_CLIENT_H_
 #define MEDIA_MOJO_SERVICES_MOJO_MEDIA_CLIENT_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 45 matching lines @@
   virtual scoped_refptr<AudioRendererSink> CreateAudioRendererSink(
       const std::string& audio_device_id);
 
   // Returns the output sink used for rendering video.
   // May be null if the RendererFactory doesn't need a video sink.
   virtual std::unique_ptr<VideoRendererSink> CreateVideoRendererSink(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
 
   // Returns the RendererFactory to be used by MojoRendererService.
   virtual std::unique_ptr<RendererFactory> CreateRendererFactory(
-      const scoped_refptr<MediaLog>& media_log);
+      MediaLog* media_log);
 
   // Returns the CdmFactory to be used by MojoCdmService. |host_interfaces| can
   // be used to request interfaces provided remotely by the host. It may be a
   // nullptr if the host chose not to bind the InterfacePtr.
   virtual std::unique_ptr<CdmFactory> CreateCdmFactory(
       service_manager::mojom::InterfaceProvider* host_interfaces);
 
  protected:
   MojoMediaClient();
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MOJO_SERVICES_MOJO_MEDIA_CLIENT_H_