Remove unused includes from core/accessibility, core/css and core/dom

Source/core/dom/EventRetargeter.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef EventRetargeter_h
 #define EventRetargeter_h
 
 #include "SVGNames.h"
 #include "core/dom/ContainerNode.h"
 #include "core/dom/EventContext.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/svg/SVGElementInstance.h"
 #include "core/svg/SVGUseElement.h"
 #include "wtf/HashMap.h"
-#include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class EventTarget;
 class FocusEvent;
 class MouseEvent;
 class Node;
 class TouchEvent;
 class TreeScope;
@@ skipping 48 matching lines @@
     SVGUseElement* useElement = static_cast<SVGUseElement*>(shadowHostElement);
     if (SVGElementInstance* instance = useElement->instanceForShadowTreeElement(referenceNode))
         return instance;
 
     return referenceNode;
 }
 
 }
 
 #endif // EventRetargeter_h