Have WebMediaPlayerImpl track ended state.

content/renderer/media/webmediaplayer_impl.h

Index: content/renderer/media/webmediaplayer_impl.h
diff --git a/content/renderer/media/webmediaplayer_impl.h b/content/renderer/media/webmediaplayer_impl.h
index f395df677132f1f1bd43080ea0302739a01724ac..a649855f6aafd424fa8cc6a3648637f591cf64aa 100644
--- a/content/renderer/media/webmediaplayer_impl.h
+++ b/content/renderer/media/webmediaplayer_impl.h
@@ -265,6 +265,10 @@ class WebMediaPlayerImpl
   double playback_rate_;
   base::TimeDelta paused_time_;
 
+  // TODO(scherkus): Replace with an explicit ended signal to HTMLMediaElement,
+  // see http://crbug.com/409280
+  bool ended_;
+
   // Seek gets pending if another seek is in progress. Only last pending seek
   // will have effect.
   bool pending_seek_;