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

Source/core/css/CSSPropertySourceData.h

 /*
  * Copyright (c) 2010 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * 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.
  */
 
 #ifndef CSSPropertySourceData_h
 #define CSSPropertySourceData_h
 
-#include <utility>
-#include <wtf/Forward.h>
-#include <wtf/HashMap.h>
-#include <wtf/RefCounted.h>
-#include <wtf/Vector.h>
-#include <wtf/text/WTFString.h>
+#include "wtf/Forward.h"
+#include "wtf/RefCounted.h"
+#include "wtf/Vector.h"
+#include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class StyleRuleBase;
 
 struct SourceRange {
     SourceRange();
     SourceRange(unsigned start, unsigned end);
     unsigned length() const;
 
@@ skipping 84 matching lines @@
     // Only for CSSStyleRules, CSSFontFaceRules, and CSSPageRules.
     RefPtr<CSSStyleSourceData> styleSourceData;
 
     // Only for CSSMediaRules.
     RuleSourceDataList childRules;
 };
 
 } // namespace WebCore
 
 #endif // CSSPropertySourceData_h