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

Source/core/dom/DeviceOrientationController.h

 /*
  * Copyright 2010, The Android Open Source Project
  * Copyright (C) 2012 Samsung Electronics. 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 copyright
@@ skipping 10 matching lines @@
  * 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 DeviceOrientationController_h
 #define DeviceOrientationController_h
 
 #include "core/page/DeviceController.h"
-#include <wtf/HashCountedSet.h>
 
 namespace WebCore {
 
 class DeviceOrientationClient;
 class DeviceOrientationData;
 
 class DeviceOrientationController : public DeviceController {
 public:
     ~DeviceOrientationController() { };
 
@@ skipping 11 matching lines @@
 
 private:
     DeviceOrientationController(Page*, DeviceOrientationClient*);
 
     Page* m_page;
 };
 
 } // namespace WebCore
 
 #endif // DeviceOrientationController_h