Have Node::document() return a reference instead of a pointer

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 143 matching lines @@
 
     #define DECLARE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(attribute) \
         virtual EventListener* on##attribute(DOMWrapperWorld* isolatedWorld); \
         virtual void setOn##attribute(PassRefPtr<EventListener>, DOMWrapperWorld* isolatedWorld); \
 
     #define DEFINE_VIRTUAL_ATTRIBUTE_EVENT_LISTENER(type, attribute) \
         EventListener* type::on##attribute(DOMWrapperWorld* isolatedWorld) { return getAttributeEventListener(eventNames().attribute##Event, isolatedWorld); } \
         void type::setOn##attribute(PassRefPtr<EventListener> listener, DOMWrapperWorld* isolatedWorld) { setAttributeEventListener(eventNames().attribute##Event, listener, isolatedWorld); } \
 
     #define DEFINE_WINDOW_ATTRIBUTE_EVENT_LISTENER(attribute) \
-        EventListener* on##attribute(DOMWrapperWorld* isolatedWorld) { return document()->getWindowAttributeEventListener(eventNames().attribute##Event, isolatedWorld); } \
-        void setOn##attribute(PassRefPtr<EventListener> listener, DOMWrapperWorld* isolatedWorld) { document()->setWindowAttributeEventListener(eventNames().attribute##Event, listener, isolatedWorld); } \
+        EventListener* on##attribute(DOMWrapperWorld* isolatedWorld) { return document().getWindowAttributeEventListener(eventNames().attribute##Event, isolatedWorld); } \
+        void setOn##attribute(PassRefPtr<EventListener> listener, DOMWrapperWorld* isolatedWorld) { document().setWindowAttributeEventListener(eventNames().attribute##Event, listener, isolatedWorld); } \
 
     #define DEFINE_MAPPED_ATTRIBUTE_EVENT_LISTENER(attribute, eventName) \
         EventListener* on##attribute(DOMWrapperWorld* isolatedWorld) { return getAttributeEventListener(eventNames().eventName##Event, isolatedWorld); } \
         void setOn##attribute(PassRefPtr<EventListener> listener, DOMWrapperWorld* isolatedWorld) { setAttributeEventListener(eventNames().eventName##Event, listener, isolatedWorld); } \
 
     #define DECLARE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(recipient, attribute) \
         EventListener* on##attribute(DOMWrapperWorld* isolatedWorld); \
         void setOn##attribute(PassRefPtr<EventListener> listener, DOMWrapperWorld* isolatedWorld);
 
     #define DEFINE_FORWARDING_ATTRIBUTE_EVENT_LISTENER(type, recipient, attribute) \
@@ skipping 28 matching lines @@
     {
         EventTargetData* d = eventTargetData();
         if (!d)
             return false;
         return d->eventListenerMap.containsCapturing(eventType);
     }
 
 } // namespace WebCore
 
 #endif // EventTarget_h