Have detached ScriptLoaders detach their PendingScripts.

third_party/WebKit/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 447 matching lines @@
             dispatchErrorEvent();
     }
     m_resource = nullptr;
 }
 
 void ScriptLoader::notifyFinished(Resource* resource)
 {
     DCHECK(!m_willBeParserExecuted);
 
     Document* contextDocument = m_element->document().contextDocument();
-    if (!contextDocument)
+    if (!contextDocument) {
+        detach();
         return;
+    }
 
     ASSERT_UNUSED(resource, resource == m_resource);
 
     ScriptRunner::ExecutionType runOrder = m_willExecuteInOrder ? ScriptRunner::IN_ORDER_EXECUTION : ScriptRunner::ASYNC_EXECUTION;
     if (m_resource->errorOccurred()) {
         contextDocument->scriptRunner()->notifyScriptLoadError(this, runOrder);
         detach();
         dispatchErrorEvent();
         return;
     }
@@ skipping 42 matching lines @@
     if (isHTMLScriptLoader(element))
         return toHTMLScriptElement(element)->loader();
 
     if (isSVGScriptLoader(element))
         return toSVGScriptElement(element)->loader();
 
     return 0;
 }
 
 } // namespace blink