Remove the HTMLMediaElementControllerNotNull use counter

Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 3500 matching lines @@
     setControllerInternal(controller);
 }
 
 void HTMLMediaElement::setControllerInternal(PassRefPtr<MediaController> controller)
 {
     if (m_mediaController)
         m_mediaController->removeMediaElement(this);
 
     m_mediaController = controller;
 
-    if (m_mediaController) {
-        UseCounter::count(document(), UseCounter::HTMLMediaElementControllerNotNull);
+    if (m_mediaController)
         m_mediaController->addMediaElement(this);
-    }
 }
 
 void HTMLMediaElement::updateMediaController()
 {
     if (m_mediaController)
         m_mediaController->reportControllerState();
 }
 
 bool HTMLMediaElement::isBlocked() const
 {
@@ skipping 99 matching lines @@
 
 void HTMLMediaElement::trace(Visitor* visitor)
 {
     visitor->trace(m_textTracks);
     visitor->trace(m_textTracksWhenResourceSelectionBegan);
     Supplementable<HTMLMediaElement>::trace(visitor);
     HTMLElement::trace(visitor);
 }
 
 }