Convert MediaLog from being ref counted to owned by WebMediaPlayer.

chromecast/media/service/cast_mojo_media_client.cc

Index: chromecast/media/service/cast_mojo_media_client.cc
diff --git a/chromecast/media/service/cast_mojo_media_client.cc b/chromecast/media/service/cast_mojo_media_client.cc
index 3fc985b15072080fe6332642a68817eb25c4ae96..80f8997ae52b6355b2a21e3a2fd8f8a588609634 100644
--- a/chromecast/media/service/cast_mojo_media_client.cc
+++ b/chromecast/media/service/cast_mojo_media_client.cc
@@ -57,7 +57,7 @@ class CastAudioRendererSink : public ::media::AudioRendererSink {
 class CastRendererFactory : public ::media::RendererFactory {
  public:
   CastRendererFactory(MediaPipelineBackendFactory* backend_factory,
-                      const scoped_refptr<::media::MediaLog>& media_log,
+                      ::media::MediaLog* media_log,
                       VideoModeSwitcher* video_mode_switcher,
                       VideoResolutionPolicy* video_resolution_policy,
                       MediaResourceTracker* media_resource_tracker)
@@ -85,7 +85,6 @@ class CastRendererFactory : public ::media::RendererFactory {
 
  private:
   MediaPipelineBackendFactory* const backend_factory_;
-  scoped_refptr<::media::MediaLog> media_log_;
   VideoModeSwitcher* video_mode_switcher_;
   VideoResolutionPolicy* video_resolution_policy_;
   MediaResourceTracker* media_resource_tracker_;
@@ -123,8 +122,7 @@ CastMojoMediaClient::CreateAudioRendererSink(
 }
 
 std::unique_ptr<::media::RendererFactory>
-CastMojoMediaClient::CreateRendererFactory(
-    const scoped_refptr<::media::MediaLog>& media_log) {
+CastMojoMediaClient::CreateRendererFactory(::media::MediaLog* media_log) {
   return base::MakeUnique<CastRendererFactory>(
       backend_factory_, media_log, video_mode_switcher_,
       video_resolution_policy_, media_resource_tracker_);