Oilpan: move DOM string collection objects to the Oilpan heap.

Source/core/dom/NamedNodeMap.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@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 17 matching lines @@
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/Attr.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/ExceptionCode.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
+#if !ENABLE(OILPAN)
 void NamedNodeMap::ref()
 {
     m_element->ref();
 }
 
 void NamedNodeMap::deref()
 {
     m_element->deref();
 }
+#endif
 
 PassRefPtr<Node> NamedNodeMap::getNamedItem(const AtomicString& name) const
 {
     return m_element->getAttributeNode(name);
 }
 
 PassRefPtr<Node> NamedNodeMap::getNamedItemNS(const AtomicString& namespaceURI, const AtomicString& localName) const
 {
     return m_element->getAttributeNodeNS(namespaceURI, localName);
 }
@@ skipping 46 matching lines @@
     return m_element->ensureAttr(m_element->attributeItem(index).name());
 }
 
 size_t NamedNodeMap::length() const
 {
     if (!m_element->hasAttributes())
         return 0;
     return m_element->attributeCount();
 }
 
+void NamedNodeMap::trace(Visitor* visitor)
+{
+    visitor->trace(m_element);
+}
+
 } // namespace WebCore