Remove duplicated headers from core/

Source/core/dom/ChildListMutationScope.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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/dom/ChildListMutationScope.h"
 
 #include "core/dom/MutationObserverInterestGroup.h"
 #include "core/dom/MutationRecord.h"
-#include "core/dom/Node.h"
 #include "core/dom/StaticNodeList.h"
 #include "wtf/HashMap.h"
-#include "wtf/OwnPtr.h"
 #include "wtf/StdLibExtras.h"
 
 namespace WebCore {
 
 typedef HashMap<Node*, ChildListMutationAccumulator*> AccumulatorMap;
 static AccumulatorMap& accumulatorMap()
 {
     DEFINE_STATIC_LOCAL(AccumulatorMap, map, ());
     return map;
 }
@@ skipping 92 matching lines @@
     if (result) {
         ASSERT(!m_previousSibling);
         ASSERT(!m_nextSibling);
         ASSERT(!m_lastAdded);
     }
 #endif
     return result;
 }
 
 } // namespace WebCore