[TEST] Forbid reentering ScriptLoader::prepareScript()

third_party/WebKit/Source/core/dom/ScriptLoader.h

 /*
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 149 matching lines @@
     // This script will be blocked if not present in http cache.
     DoNotFetchDocWrittenScript,
     // If a parser blocking doc.written script was not fetched and was not
     // present in the http cache, send a GET for it with an interventions
     // header to allow the server to know of the intervention. This fetch
     // will be using DeferOption::IdleLoad to keep it out of the critical
     // path.
     FetchDocWrittenScriptDeferIdle,
   };
 
+  bool m_inPrepareScript = false;
+
   DocumentWriteIntervention m_documentWriteIntervention;
 
   Member<PendingScript> m_pendingScript;
 };
 
 ScriptLoader* toScriptLoaderIfPossible(Element*);
 
 }  // namespace blink
 
 #endif  // ScriptLoader_h