Oilpan: cleanup based on review comments after removal of TreeShared.

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 238 matching lines @@
 
     // We have to return fetchedResource instead of let callers ask ScriptLoader::resource()
     // because resource() can be null when it is accessed: Following setResource() can trigger clearResource().
     return ScriptPrep(true, resource);
 }
 
 ResourcePtr<ScriptResource> ScriptLoader::fetchScript(const String& sourceUrl)
 {
     ASSERT(m_element);
 
-    RefPtr<Document> elementDocument(m_element->document());
+    RefPtrWillBeRawPtr<Document> elementDocument(m_element->document());
     if (!m_element->inDocument() || m_element->document() != elementDocument)
         return ResourcePtr<ScriptResource>();
 
     ASSERT(!resource());
     ResourcePtr<ScriptResource> resource;
     if (!stripLeadingAndTrailingHTMLSpaces(sourceUrl).isEmpty()) {
         FetchRequest request(ResourceRequest(elementDocument->completeURL(sourceUrl)), m_element->localName());
 
         AtomicString crossOriginMode = m_element->fastGetAttribute(HTMLNames::crossoriginAttr);
         if (!crossOriginMode.isNull())
@@ skipping 179 matching lines @@
     if (isHTMLScriptLoader(element))
         return toHTMLScriptElement(element)->loader();
 
     if (isSVGScriptLoader(element))
         return toSVGScriptElement(element)->loader();
 
     return 0;
 }
 
 }