Move pending async script to the correct resolved document.

Source/core/html/HTMLScriptElement.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.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 55 matching lines @@
 }
 
 void HTMLScriptElement::childrenChanged(const ChildrenChange& change)
 {
     HTMLElement::childrenChanged(change);
     m_loader->childrenChanged();
 }
 
 void HTMLScriptElement::didMoveToNewDocument(Document& oldDocument)
 {
-    oldDocument.scriptRunner()->movePendingAsyncScript(document().scriptRunner(), m_loader.get());
+    if (RefPtrWillBeRawPtr<Document> contextDocument = document().contextDocument().get())
+        oldDocument.scriptRunner()->movePendingAsyncScript(contextDocument->scriptRunner(), m_loader.get());
     HTMLElement::didMoveToNewDocument(oldDocument);
 }
 
 void HTMLScriptElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     if (name == srcAttr)
         m_loader->handleSourceAttribute(value);
     else if (name == asyncAttr)
         m_loader->handleAsyncAttribute();
     else
@@ skipping 99 matching lines @@
     ASSERT(!m_loader->haveFiredLoadEvent());
     dispatchEvent(Event::create(EventTypeNames::load));
 }
 
 PassRefPtrWillBeRawPtr<Element> HTMLScriptElement::cloneElementWithoutAttributesAndChildren()
 {
     return adoptRefWillBeNoop(new HTMLScriptElement(document(), false, m_loader->alreadyStarted()));
 }
 
 }