Oilpan: move ScriptLoader to the heap.

Source/core/dom/ScriptLoader.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * 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 60 matching lines @@
     ASSERT(m_element);
     if (parserInserted && element->document().scriptableDocumentParser() && !element->document().isInDocumentWrite())
         m_startLineNumber = element->document().scriptableDocumentParser()->lineNumber();
 }
 
 ScriptLoader::~ScriptLoader()
 {
     m_pendingScript.stopWatchingForLoad(this);
 }
 
+void ScriptLoader::trace(Visitor* visitor)
+{
+    visitor->trace(m_element);
+    visitor->trace(m_pendingScript);
+}
+
 void ScriptLoader::didNotifySubtreeInsertionsToDocument()
 {
     if (!m_parserInserted)
         prepareScript(); // FIXME: Provide a real starting line number here.
 }
 
 void ScriptLoader::childrenChanged()
 {
     if (!m_parserInserted && m_element->inDocument())
         prepareScript(); // FIXME: Provide a real starting line number here.
@@ skipping 274 matching lines @@
         contextDocument->popCurrentScript();
     }
 }
 
 void ScriptLoader::execute()
 {
     ASSERT(!m_willBeParserExecuted);
     ASSERT(m_pendingScript.resource());
     bool errorOccurred = false;
     ScriptSourceCode source = m_pendingScript.getSource(KURL(), errorOccurred);
-    RefPtr<Element> element = m_pendingScript.releaseElementAndClear();
+    RefPtrWillBeRawPtr<Element> element = m_pendingScript.releaseElementAndClear();
+    ALLOW_UNUSED_LOCAL(element);
     if (errorOccurred) {
         dispatchErrorEvent();
     } else if (!m_resource->wasCanceled()) {
         executeScript(source);
         dispatchLoadEvent();
     }
     m_resource = 0;
 }
 
 void ScriptLoader::notifyFinished(Resource* resource)
@@ skipping 62 matching lines @@
 {
     if (isHTMLScriptLoader(element))
         return toHTMLScriptElement(element)->loader();
 
     if (isSVGScriptLoader(element))
         return toSVGScriptElement(element)->loader();
 
     return 0;
 }
 
-}
+} // namespace blink