Oilpan: Remove guardRef and guardDeref from TreeScope.

Source/core/svg/SVGUseElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  * Copyright (C) 2011 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012 University of Szeged
  * Copyright (C) 2012 Renata Hodovan <reni@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 65 matching lines @@
 {
     // Always build a user agent #shadow-root for SVGUseElement.
     RefPtr<SVGUseElement> use = adoptRef(new SVGUseElement(document, wasInsertedByParser));
     use->ensureUserAgentShadowRoot();
     return use.release();
 }
 
 SVGUseElement::~SVGUseElement()
 {
     setDocumentResource(0);
-
+#if !ENABLE(OILPAN)
     clearResourceReferences();
+#endif
 }
 
 SVGElementInstance* SVGUseElement::instanceRoot()
 {
     // If there is no element instance tree, force immediate SVGElementInstance tree
     // creation by asking the document to invoke our recalcStyle function - as we can't
     // wait for the lazy creation to happen if e.g. JS wants to access the instanceRoot
     // object right after creating the element on-the-fly
     if (!m_targetElementInstance)
         document().updateRenderTreeIfNeeded();
@@ skipping 866 matching lines @@
 
     if (m_resource)
         m_resource->removeClient(this);
 
     m_resource = resource;
     if (m_resource)
         m_resource->addClient(this);
 }
 
 }