Prepare SVGDocumentExtensions::m_elementDependencies for oilpan

Source/core/svg/SVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) 2009 Cameron McCormack <cam@mcc.id.au>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 83 matching lines @@
         if (SVGCursorElement* cursorElement = svgRareData()->cursorElement())
             cursorElement->removeReferencedElement(this);
         if (CSSCursorImageValue* cursorImageValue = svgRareData()->cursorImageValue())
             cursorImageValue->removeReferencedElement(this);
         // Clear the rare data now so that we are in a consistent state when
         // calling rebuildAllElementReferencesForTarget() below.
         m_SVGRareData.clear();
     }
 
     // With Oilpan, either removedFrom has been called or the document is dead
-    // as well and there is no reason to clear out the extensions.
+    // as well and there is no reason to clear out the references.
     document().accessSVGExtensions().rebuildAllElementReferencesForTarget(this);
     document().accessSVGExtensions().removeAllElementReferencesForTarget(this);
 #endif
 }
 
 void SVGElement::detach(const AttachContext& context)
 {
     Element::detach(context);
     if (SVGElement* element = correspondingElement())
         element->removeInstanceMapping(this);
@@ skipping 1055 matching lines @@
 #endif
 
 void SVGElement::trace(Visitor* visitor)
 {
     visitor->trace(m_elementsWithRelativeLengths);
     visitor->trace(m_SVGRareData);
     Element::trace(visitor);
 }
 
 }