Support fetching attribute listeners from outside v8 context scopes.

third_party/WebKit/Source/core/events/EventTarget.cpp

Index: third_party/WebKit/Source/core/events/EventTarget.cpp
diff --git a/third_party/WebKit/Source/core/events/EventTarget.cpp b/third_party/WebKit/Source/core/events/EventTarget.cpp
index 99562b50dbc1064632c9c4b1335e3a1f0570fef2..329f68dac5f754f349b632821aa2bf69577f238d 100644
--- a/third_party/WebKit/Source/core/events/EventTarget.cpp
+++ b/third_party/WebKit/Source/core/events/EventTarget.cpp
@@ -413,9 +413,11 @@ EventListener* EventTarget::getAttributeEventListener(
   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;