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

Source/core/dom/PseudoElement.h

 /*
  * Copyright (C) 2012 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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 10 matching lines @@
  * 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 PseudoElement_h
 #define PseudoElement_h
 
 #include "core/dom/Element.h"
-#include "core/dom/Event.h"
 #include "core/rendering/style/RenderStyle.h"
-#include <wtf/Forward.h>
+#include "wtf/Forward.h"
 
 namespace WebCore {
 
 class PseudoElement FINAL : public Element {
 public:
     static PassRefPtr<PseudoElement> create(Element* parent, PseudoId pseudoId)
     {
         return adoptRef(new PseudoElement(parent, pseudoId));
     }
     ~PseudoElement();
@@ skipping 19 matching lines @@
 const QualifiedName& pseudoElementTagName();
 
 inline bool pseudoElementRendererIsNeeded(const RenderStyle* style)
 {
     return style && style->display() != NONE && (style->contentData() || !style->regionThread().isEmpty());
 }
 
 } // namespace
 
 #endif