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

Source/core/dom/shadow/InsertionPoint.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.
  *     * 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 InsertionPoint_h
 #define InsertionPoint_h
 
-#include "HTMLNames.h"
 #include "core/css/CSSSelectorList.h"
 #include "core/dom/shadow/ContentDistributor.h"
 #include "core/dom/shadow/ElementShadow.h"
-#include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLElement.h"
 #include "wtf/Forward.h"
 
 namespace WebCore {
 
 class InsertionPoint : public HTMLElement {
 public:
     enum Type {
         ShadowInsertionPoint,
         ContentInsertionPoint
@@ skipping 110 matching lines @@
     return 0;
 }
 
 InsertionPoint* resolveReprojection(const Node*);
 
 void collectInsertionPointsWhereNodeIsDistributed(const Node*, Vector<InsertionPoint*, 8>& results);
 
 } // namespace WebCore
 
 #endif // InsertionPoint_h