Merge the Sky Engine changes from the SkyDart branch

sky/engine/core/events/EventListenerMap.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>
  * Copyright (C) 2011 Andreas Kling (kling@webkit.org)
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 158 matching lines @@
     return 0;
 }
 
 EventListenerIterator::EventListenerIterator()
     : m_map(0)
     , m_entryIndex(0)
     , m_index(0)
 {
 }
 
-EventListenerIterator::EventListenerIterator(EventTarget* target)
+EventListenerIterator::EventListenerIterator(const EventTarget* target)
     : m_map(0)
     , m_entryIndex(0)
     , m_index(0)
 {
     ASSERT(target);
-    EventTargetData* data = target->eventTargetData();
+    EventTargetData* data = const_cast<EventTarget*>(target)->eventTargetData();
 
     if (!data)
         return;
 
     m_map = &data->eventListenerMap;
 
 #if ENABLE(ASSERT)
     {
         MutexLocker locker(activeIteratorCountMutex());
         m_map->m_activeIteratorCount++;
@@ skipping 20 matching lines @@
         EventListenerVector& listeners = *m_map->m_entries[m_entryIndex].second;
         if (m_index < listeners.size())
             return listeners[m_index++].listener.get();
         m_index = 0;
     }
 
     return 0;
 }
 
 } // namespace blink