Media controls refer to less magic state.

third_party/WebKit/Source/core/html/shadow/MediaControls.h

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 64 matching lines @@
 
     void mediaElementFocused();
 
     // Returns the layout object for the part of the controls that should be
     // used for overlap checking during text track layout. May be null.
     LayoutObject* layoutObjectForTextTrackLayout();
 
     // Notify us that our controls enclosure has changed width.
     void notifyPanelWidthChanged(const LayoutUnit& newWidth);
 
+    // Notify us that the media element's network state has changed.
+    void networkStateChanged();
+
     DECLARE_VIRTUAL_TRACE();
 
 private:
+    void invalidate(Element*);
+
     class BatchedControlUpdate;
 
     explicit MediaControls(HTMLMediaElement&);
 
     void initializeControls();
 
     void makeOpaque();
     void makeTransparent();
 
     void updatePlayState();
@@ skipping 50 matching lines @@
     int m_panelWidth;
 
     bool m_allowHiddenVolumeControls : 1;
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(MediaControls, isMediaControls());
 
 }
 
 #endif