Force the video to go fullscreen when setting persistent video

content/common/media/media_player_delegate_messages.h

Index: content/common/media/media_player_delegate_messages.h
diff --git a/content/common/media/media_player_delegate_messages.h b/content/common/media/media_player_delegate_messages.h
index 619fc31f6d320ecb238f292af95183054efb2ae8..0be4c6ca89cad41c7477126b433f62f9261a02f7 100644
--- a/content/common/media/media_player_delegate_messages.h
+++ b/content/common/media/media_player_delegate_messages.h
@@ -34,6 +34,10 @@ IPC_MESSAGE_ROUTED2(MediaPlayerDelegateMsg_UpdateVolumeMultiplier,
                     int /* delegate_id, distinguishes instances */,
                     double /* multiplier */)
 
+IPC_MESSAGE_ROUTED2(MediaPlayerDelegateMsg_BecamePersistentVideo,
+                    int /* delegate_id, distinguishes instances */,
+                    double /* is_persistent */)
+
 // ----------------------------------------------------------------------------
 // Messages from the renderer notifying the browser of playback state changes.
 // ----------------------------------------------------------------------------