Oilpan: move LiveNodeList collections to the heap.

Source/core/html/HTMLDataListElement.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 32 matching lines @@
 {
     ScriptWrappable::init(this);
 }
 
 PassRefPtrWillBeRawPtr<HTMLDataListElement> HTMLDataListElement::create(Document& document)
 {
     UseCounter::count(document, UseCounter::DataListElement);
     return adoptRefWillBeRefCountedGarbageCollected(new HTMLDataListElement(document));
 }
 
-PassRefPtr<HTMLCollection> HTMLDataListElement::options()
+PassRefPtrWillBeRawPtr<HTMLCollection> HTMLDataListElement::options()
 {
     return ensureCachedHTMLCollection(DataListOptions);
 }
 
 void HTMLDataListElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
 {
     HTMLElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
     if (!changedByParser)
         treeScope().idTargetObserverRegistry().notifyObservers(getIdAttribute());
 }
 
 void HTMLDataListElement::finishParsingChildren()
 {
     treeScope().idTargetObserverRegistry().notifyObservers(getIdAttribute());
 }
 
 void HTMLDataListElement::optionElementChildrenChanged()
 {
     treeScope().idTargetObserverRegistry().notifyObservers(getIdAttribute());
 }
 
 } // namespace WebCore