Refactoring: Get rid of isDocument() check in EventTarget.

Source/core/dom/EventTarget.h

 /*
  * 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, 2008 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 118 matching lines @@
     protected:
         virtual ~EventTarget();
 
         virtual EventTargetData* eventTargetData() = 0;
         virtual EventTargetData* ensureEventTargetData() = 0;
 
     private:
         virtual void refEventTarget() = 0;
         virtual void derefEventTarget() = 0;
 
+        DOMWindow* executingWindow();
         void fireEventListeners(Event*, EventTargetData*, EventListenerVector&);
 
         bool clearAttributeEventListener(const AtomicString& eventType, DOMWrapperWorld* isolatedWorld);
 
         friend class EventListenerIterator;
     };
 
     // FIXME: These macros should be split into separate DEFINE and DECLARE
     // macros to avoid causing so many header includes.
     #define DEFINE_ATTRIBUTE_EVENT_LISTENER(attribute) \
@@ skipping 52 matching lines @@
     {
         EventTargetData* d = eventTargetData();
         if (!d)
             return false;
         return d->eventListenerMap.containsCapturing(eventType);
     }
 
 } // namespace WebCore
 
 #endif // EventTarget_h