Implement SetWrapperReferenceFrom idl attribute within traceWrappers for media tracks

third_party/WebKit/Source/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 65 matching lines @@
 
     enum class RecordMetricsBehavior {
         DoNotRecord,
         DoRecord
     };
 
     static void setMediaStreamRegistry(URLRegistry*);
     static bool isMediaStreamURL(const String& url);
 
     DECLARE_VIRTUAL_TRACE();
+
+    DECLARE_VIRTUAL_TRACE_WRAPPERS();
+
     void clearWeakMembers(Visitor*);
     WebMediaPlayer* webMediaPlayer() const
     {
         return m_webMediaPlayer.get();
     }
 
     // Returns true if the loaded media has a video track.
     // Note that even an audio element can have video track in cases such as
     // <audio src="video.webm">, in which case this function will return true.
     bool hasVideo() const;
@@ skipping 558 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