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

Source/core/css/CSSFilterValue.h

 /*
  * Copyright (C) 2011 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * 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.
  */
 
 #ifndef CSSFilterValue_h
 #define CSSFilterValue_h
 
 #include "core/css/CSSValueList.h"
 #include "wtf/PassRefPtr.h"
-#include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class CSSFilterValue : public CSSValueList {
 public:
     // NOTE: these have to match the values in the IDL
     enum FilterOperationType {
         UnknownFilterOperation,
         ReferenceFilterOperation,
         GrayscaleFilterOperation,
@@ skipping 30 matching lines @@
     CSSFilterValue(FilterOperationType);
     CSSFilterValue(const CSSFilterValue& cloneFrom);
 
     FilterOperationType m_type;
 };
 
 }
 
 
 #endif