Remove ~1750 superfluous includes from core

Source/core/rendering/RenderSlider.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010 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/rendering/RenderSlider.h"
 
-#include "CSSPropertyNames.h"
-#include "HTMLNames.h"
-#include "core/css/resolver/StyleResolver.h"
-#include "core/dom/Document.h"
-#include "core/dom/Event.h"
-#include "core/dom/EventNames.h"
-#include "core/dom/MouseEvent.h"
-#include "core/dom/Node.h"
-#include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLInputElement.h"
-#include "core/html/StepRange.h"
-#include "core/html/parser/HTMLParserIdioms.h"
-#include "core/html/shadow/MediaControlElements.h"
 #include "core/html/shadow/SliderThumbElement.h"
-#include "core/page/EventHandler.h"
-#include "core/page/Frame.h"
-#include "core/rendering/RenderLayer.h"
-#include "core/rendering/RenderTheme.h"
-#include "core/rendering/RenderView.h"
 #include <wtf/MathExtras.h>
 
 using std::min;
 
 namespace WebCore {
 
 const int RenderSlider::defaultTrackLength = 129;
 
 RenderSlider::RenderSlider(HTMLInputElement* element)
     : RenderFlexibleBox(element)
@@ skipping 63 matching lines @@
 
     RenderFlexibleBox::layout();
 }
 
 bool RenderSlider::inDragMode() const
 {
     return sliderThumbElementOf(node())->active();
 }
 
 } // namespace WebCore