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

Source/core/css/CSSSegmentedFontFace.h

 /*
  * Copyright (C) 2008 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 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CSSSegmentedFontFace_h
 #define CSSSegmentedFontFace_h
 
 #include <wtf/HashMap.h>
 #include <wtf/PassRefPtr.h>
 #include <wtf/RefCounted.h>
 #include <wtf/Vector.h>
-#include <wtf/unicode/Unicode.h>
 
 namespace WebCore {
 
 class CSSFontFace;
 class CSSFontSelector;
 class FontData;
 class FontDescription;
 class SegmentedFontData;
 
 class CSSSegmentedFontFace : public RefCounted<CSSSegmentedFontFace> {
@@ skipping 28 matching lines @@
 
     CSSFontSelector* m_fontSelector;
     HashMap<unsigned, RefPtr<SegmentedFontData> > m_fontDataTable;
     Vector<RefPtr<CSSFontFace>, 1> m_fontFaces;
     Vector<RefPtr<LoadFontCallback> > m_callbacks;
 };
 
 } // namespace WebCore
 
 #endif // CSSSegmentedFontFace_h