Remove various Heap* types.

sky/engine/core/html/HTMLMediaElement.h

 /*
  * 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 44 matching lines @@
 // But it can't be until the Chromium WebMediaPlayerClientImpl class is fixed so it
 // no longer depends on typecasting a MediaPlayerClient to an HTMLMediaElement.
 
 class HTMLMediaElement : public HTMLElement, public Supplementable<HTMLMediaElement>, public MediaPlayerClient, public ActiveDOMObject
 {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLMediaElement);
 public:
     static blink::WebMimeRegistry::SupportsType supportsType(const ContentType&, const String& keySystem = String());
 
-    virtual void trace(Visitor*) override;
-
     // Do not use player().
     // FIXME: Replace all uses with webMediaPlayer() and remove this API.
     MediaPlayer* player() const { return m_player.get(); }
     blink::WebMediaPlayer* webMediaPlayer() const { return m_player ? m_player->webMediaPlayer() : 0; }
 
     virtual bool hasVideo() const { return false; }
     bool hasAudio() const;
 
     bool supportsSave() const;
 
@@ skipping 362 matching lines @@
 inline bool isHTMLMediaElement(const HTMLElement& element)
 {
     return isHTMLAudioElement(element) || isHTMLVideoElement(element);
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLMediaElement);
 
 } // namespace blink
 
 #endif // HTMLMediaElement_h