Remove dead code for reflected attributes on <audio>, <video> and <track>

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 2042 matching lines @@
     // The ended attribute must return true if the media element has ended
     // playback and the direction of playback is forwards, and false otherwise.
     return endedPlayback() && m_playbackRate > 0;
 }
 
 bool HTMLMediaElement::autoplay() const
 {
     return fastHasAttribute(autoplayAttr);
 }
 
-void HTMLMediaElement::setAutoplay(bool b)
-{
-    LOG(Media, "HTMLMediaElement::setAutoplay(%s)", boolString(b));
-    setBooleanAttribute(autoplayAttr, b);
-}
-
 String HTMLMediaElement::preload() const
 {
     switch (m_preload) {
     case MediaPlayer::None:
         return "none";
         break;
     case MediaPlayer::MetaData:
         return "metadata";
         break;
     case MediaPlayer::Auto:
@@ skipping 1797 matching lines @@
 {
     scheduleLayerUpdate();
 }
 
 bool HTMLMediaElement::isInteractiveContent() const
 {
     return fastHasAttribute(controlsAttr);
 }
 
 }