Cast: Remove LoggingStats in favor of event subscribers.

chrome/renderer/media/cast_session_delegate.h

Index: chrome/renderer/media/cast_session_delegate.h
diff --git a/chrome/renderer/media/cast_session_delegate.h b/chrome/renderer/media/cast_session_delegate.h
index d8e76896d31f32ce801d208f2edb1e5529f5ca1d..008c327b9af83c449daa8f1850579e60c950bc97 100644
--- a/chrome/renderer/media/cast_session_delegate.h
+++ b/chrome/renderer/media/cast_session_delegate.h
@@ -32,6 +32,7 @@ namespace cast {
 class CastEnvironment;
 class EncodingEventSubscriber;
 class FrameInput;
+class StatsEventSubscriber;
 
 namespace transport {
 class CastTransportSender;
@@ -108,6 +109,9 @@ class CastSessionDelegate {
   scoped_ptr<media::cast::EncodingEventSubscriber> audio_event_subscriber_;
   scoped_ptr<media::cast::EncodingEventSubscriber> video_event_subscriber_;
 
+  scoped_ptr<media::cast::StatsEventSubscriber> audio_stats_subscriber_;
+  scoped_ptr<media::cast::StatsEventSubscriber> video_stats_subscriber_;
+
   // Proxy to the IO message loop.
   scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
   base::WeakPtrFactory<CastSessionDelegate> weak_factory_;