Support fetching attribute listeners from outside v8 context scopes.

third_party/WebKit/Source/core/events/EventTarget.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) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  *           (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 395 matching lines @@
   if (!listener)
     return false;
   return addEventListener(eventType, listener, false);
 }
 
 EventListener* EventTarget::getAttributeEventListener(
     const AtomicString& eventType) {
   EventListenerVector* listenerVector = getEventListeners(eventType);
   if (!listenerVector)
     return nullptr;
+
   for (auto& eventListener : *listenerVector) {
     EventListener* listener = eventListener.listener();
-    if (listener->isAttribute() && listener->belongsToTheCurrentWorld())
+    if (listener->isAttribute() &&
+        listener->belongsToTheCurrentWorld(getExecutionContext()))
       return listener;
   }
   return nullptr;
 }
 
 bool EventTarget::clearAttributeEventListener(const AtomicString& eventType) {
   EventListener* listener = getAttributeEventListener(eventType);
   if (!listener)
     return false;
   return removeEventListener(eventType, listener, false);
@@ skipping 327 matching lines @@
   // they have one less listener to invoke.
   if (d->firingEventIterators) {
     for (size_t i = 0; i < d->firingEventIterators->size(); ++i) {
       d->firingEventIterators->at(i).iterator = 0;
       d->firingEventIterators->at(i).end = 0;
     }
   }
 }
 
 }  // namespace blink