Remove some unused includes from core/css and core/dom

Source/core/dom/KeyboardEvent.cpp

 /**
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2005, 2006, 2007 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/dom/KeyboardEvent.h"
 
-#include "core/dom/Document.h"
-#include "core/dom/EventDispatcher.h"
 #include "core/dom/EventNames.h"
-#include "core/page/DOMWindow.h"
-#include "core/page/EventHandler.h"
-#include "core/page/Frame.h"
-#include "core/page/Settings.h"
 #include "core/platform/PlatformKeyboardEvent.h"
 #include "core/platform/WindowsKeyboardCodes.h"
 
 namespace WebCore {
 
 static inline const AtomicString& eventTypeForKeyboardEventType(PlatformEvent::Type type)
 {
     switch (type) {
         case PlatformEvent::KeyUp:
             return eventNames().keyupEvent;
@@ skipping 191 matching lines @@
 {
 }
 
 bool KeyboardEventDispatchMediator::dispatchEvent(EventDispatcher* dispatcher) const
 {
     // Make sure not to return true if we already took default action while handling the event.
     return EventDispatchMediator::dispatchEvent(dispatcher) && !event()->defaultHandled();
 }
 
 } // namespace WebCore