Implement SetWrapperReferenceFrom idl attribute within traceWrappers for media tracks

third_party/WebKit/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 3604 matching lines @@
     visitor->trace(m_audioSourceProvider);
     visitor->trace(m_autoplayHelperClient);
     visitor->trace(m_autoplayHelper);
     visitor->trace(m_srcObject);
     visitor->template registerWeakMembers<HTMLMediaElement, &HTMLMediaElement::clearWeakMembers>(this);
     Supplementable<HTMLMediaElement>::trace(visitor);
     HTMLElement::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
+DEFINE_TRACE_WRAPPERS(HTMLMediaElement)
+{
+    visitor->traceWrappers(m_videoTracks);
+    visitor->traceWrappers(m_audioTracks);
+    visitor->traceWrappers(m_textTracks);
+    HTMLElement::traceWrappers(visitor);
+}
+
 void HTMLMediaElement::createPlaceholderTracksIfNecessary()
 {
     if (!RuntimeEnabledFeatures::audioVideoTracksEnabled())
         return;
 
     // Create a placeholder audio track if the player says it has audio but it didn't explicitly announce the tracks.
     if (hasAudio() && !audioTracks().length())
         addAudioTrack("audio", WebMediaPlayerClient::AudioTrackKindMain, "Audio Track", "", true);
 
     // Create a placeholder video track if the player says it has video but it didn't explicitly announce the tracks.
@@ skipping 230 matching lines @@
 
 IntRect HTMLMediaElement::AutoplayHelperClientImpl::absoluteBoundingBoxRect() const
 {
     IntRect result;
     if (LayoutObject* object = m_element->layoutObject())
         result = object->absoluteBoundingBoxRect();
     return result;
 }
 
 } // namespace blink