Oilpan: move LiveNodeList collections to the heap.

Source/web/WebDocument.cpp

 /*
  * Copyright (C) 2009 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 141 matching lines @@
     return WebString(constUnwrap<Document>()->title());
 }
 
 WebElementCollection WebDocument::all()
 {
     return WebElementCollection(unwrap<Document>()->all());
 }
 
 void WebDocument::images(WebVector<WebElement>& results)
 {
-    RefPtr<HTMLCollection> images = unwrap<Document>()->images();
+    RefPtrWillBeRawPtr<HTMLCollection> images = unwrap<Document>()->images();
     size_t sourceLength = images->length();
     Vector<WebElement> temp;
     temp.reserveCapacity(sourceLength);
     for (size_t i = 0; i < sourceLength; ++i) {
         Element* element = images->item(i);
         if (element && element->isHTMLElement())
             temp.append(WebElement(element));
     }
     results.assign(temp);
 }
 
 void WebDocument::forms(WebVector<WebFormElement>& results) const
 {
-    RefPtr<HTMLCollection> forms = const_cast<Document*>(constUnwrap<Document>())->forms();
+    RefPtrWillBeRawPtr<HTMLCollection> forms = const_cast<Document*>(constUnwrap<Document>())->forms();
     size_t sourceLength = forms->length();
     Vector<WebFormElement> temp;
     temp.reserveCapacity(sourceLength);
     for (size_t i = 0; i < sourceLength; ++i) {
         Element* element = forms->item(i);
         // Strange but true, sometimes node can be 0.
         if (element && element->isHTMLElement())
             temp.append(WebFormElement(toHTMLFormElement(element)));
     }
     results.assign(temp);
@@ skipping 124 matching lines @@
     m_private = elem;
     return *this;
 }
 
 WebDocument::operator PassRefPtrWillBeRawPtr<Document>() const
 {
     return toDocument(m_private.get());
 }
 
 } // namespace blink