Revert of Revert of Propagate audible state from player to the containing tab"

media/base/android/media_player_android.h

Index: media/base/android/media_player_android.h
diff --git a/media/base/android/media_player_android.h b/media/base/android/media_player_android.h
index cd5a92f18e1239fca5f9fa2df61e1e4771a303c2..d9091d4195b414f065ab9a5ae319a373a43a2b11 100644
--- a/media/base/android/media_player_android.h
+++ b/media/base/android/media_player_android.h
@@ -102,6 +102,7 @@ class MEDIA_EXPORT MediaPlayerAndroid {
   // events. Otherwise, it also listens to the events from |j_media_player|.
   void AttachListener(jobject j_media_player);
   void DetachListener();
+  void SetAudible(bool is_audible);
 
   MediaPlayerManager* manager() { return manager_; }
 
@@ -122,6 +123,9 @@ class MEDIA_EXPORT MediaPlayerAndroid {
   // Listener object that listens to all the media player events.
   scoped_ptr<MediaPlayerListener> listener_;
 
+  // Maintains the audible state of the player, true if it is playing sound.
+  bool is_audible_;
+
   // Weak pointer passed to |listener_| for callbacks.
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<MediaPlayerAndroid> weak_factory_;