Transitively keep track of an isolated world's children scripts and worlds.

third_party/WebKit/Source/bindings/core/v8/V8AbstractEventListener.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 127 matching lines @@
 
     static void setWeakCallback(const v8::WeakCallbackInfo<V8AbstractEventListener>&);
     static void secondWeakCallback(const v8::WeakCallbackInfo<V8AbstractEventListener>&);
 
     ScopedPersistent<v8::Object> m_listener;
 
     // Indicates if this is an HTML type listener.
     bool m_isAttribute;
 
     RefPtr<DOMWrapperWorld> m_world;
+    RefPtr<DOMWrapperWorld> m_originWorld;
     v8::Isolate* m_isolate;
 
     // nullptr unless this listener belongs to a worker.
     RawPtrWillBeMember<WorkerGlobalScope> m_workerGlobalScope;
 
 #if ENABLE(OILPAN)
     SelfKeepAlive<V8AbstractEventListener> m_keepAlive;
 #endif
 };
 
 } // namespace blink
 
 #endif // V8AbstractEventListener_h