Use MeasureAs and ImplementedAs in media IDL

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 3529 matching lines @@
         m_processingPreferenceChange = true;
         markCaptionAndSubtitleTracksAsUnconfigured();
         m_processingPreferenceChange = false;
 
         updateTextTrackDisplay();
     }
 }
 
 unsigned HTMLMediaElement::webkitAudioDecodedByteCount() const
 {
-    UseCounter::count(document(), UseCounter::PrefixedAudioDecodedByteCount);
     if (!m_player)
         return 0;
     return m_player->audioDecodedByteCount();
 }
 
 unsigned HTMLMediaElement::webkitVideoDecodedByteCount() const
 {
-    UseCounter::count(document(), UseCounter::PrefixedVideoDecodedByteCount);
     if (!m_player)
         return 0;
     return m_player->videoDecodedByteCount();
 }
 
 bool HTMLMediaElement::isURLAttribute(const Attribute& attribute) const
 {
     return attribute.name() == srcAttr || HTMLElement::isURLAttribute(attribute);
 }
 
@@ skipping 319 matching lines @@
 {
     scheduleLayerUpdate();
 }
 
 bool HTMLMediaElement::isInteractiveContent() const
 {
     return fastHasAttribute(controlsAttr);
 }
 
 }