Remove unused includes from core/{editing,fileapi,history,html}

Source/core/html/shadow/SliderThumbElement.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * 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.
@@ skipping 16 matching lines @@
  * 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 SliderThumbElement_h
 #define SliderThumbElement_h
 
 #include "HTMLNames.h"
 #include "core/html/HTMLDivElement.h"
-#include "core/platform/graphics/FloatPoint.h"
 #include "core/rendering/RenderBlock.h"
-#include "core/rendering/style/RenderStyleConstants.h"
-#include <wtf/Forward.h>
+#include "wtf/Forward.h"
 
 namespace WebCore {
 
 class HTMLElement;
 class HTMLInputElement;
 class Event;
 class FloatPoint;
 
 class SliderThumbElement FINAL : public HTMLDivElement {
 public:
@@ skipping 70 matching lines @@
 
 private:
     SliderContainerElement(Document*);
     virtual RenderObject* createRenderer(RenderStyle*);
     virtual const AtomicString& shadowPseudoId() const;
 };
 
 }
 
 #endif