Oilpan: Remove a visitor parameter from isHeapObjectAlive

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 3643 matching lines @@
         audioTracks().anonymousIndexedGetter(0)->setEnabled(true);
 
     // Select the first video track if a video track hasn't been selected yet.
     if (videoTracks().length() > 0 && videoTracks().selectedIndex() == -1)
         videoTracks().anonymousIndexedGetter(0)->setSelected(true);
 }
 
 #if ENABLE(WEB_AUDIO)
 void HTMLMediaElement::clearWeakMembers(Visitor* visitor)
 {
-    if (!visitor->isHeapObjectAlive(m_audioSourceNode) && audioSourceProvider())
+    if (!Heap::isHeapObjectAlive(m_audioSourceNode) && audioSourceProvider())
         audioSourceProvider()->setClient(nullptr);
 }
 #endif
 
 }