Remove more API from Node and ContainerNode.

sky/engine/core/dom/MutationObserverRegistration.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 35 matching lines @@
     : m_observer(observer)
     , m_registrationNode(registrationNode)
     , m_options(options)
     , m_attributeFilter(attributeFilter)
 {
     m_observer->observationStarted(this);
 }
 
 MutationObserverRegistration::~MutationObserverRegistration()
 {
-#if !ENABLE(OILPAN)
     dispose();
-#endif
 }
 
 void MutationObserverRegistration::dispose()
 {
     clearTransientRegistrations();
     m_observer->observationEnded(this);
     m_observer.clear();
 }
 
 void MutationObserverRegistration::resetObservation(MutationObserverOptions options, const HashSet<AtomicString>& attributeFilter)
@@ skipping 62 matching lines @@
 void MutationObserverRegistration::addRegistrationNodesToSet(HashSet<RawPtr<Node> >& nodes) const
 {
     ASSERT(m_registrationNode);
     nodes.add(m_registrationNode.get());
     if (!m_transientRegistrationNodes)
         return;
     for (NodeHashSet::const_iterator iter = m_transientRegistrationNodes->begin(); iter != m_transientRegistrationNodes->end(); ++iter)
         nodes.add(iter->get());
 }
 
-void MutationObserverRegistration::trace(Visitor* visitor)
-{
-    visitor->trace(m_observer);
-    visitor->trace(m_registrationNode);
-    visitor->trace(m_registrationNodeKeepAlive);
-#if ENABLE(OILPAN)
-    visitor->trace(m_transientRegistrationNodes);
-#endif
-}
-
 } // namespace blink