Remove unnecessary inclusions of LayoutObject-derived headers in core/html/

third_party/WebKit/Source/core/html/shadow/SliderThumbElement.cpp

 /*
  * 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 22 matching lines @@
 
 #include "core/events/Event.h"
 #include "core/events/MouseEvent.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/forms/StepRange.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/html/shadow/ShadowElementNames.h"
 #include "core/input/EventHandler.h"
-#include "core/layout/LayoutSlider.h"
 #include "core/layout/LayoutSliderContainer.h"
 #include "core/layout/LayoutSliderThumb.h"
 #include "core/layout/LayoutTheme.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 inline static bool hasVerticalAppearance(HTMLInputElement* input)
 {
@@ skipping 270 matching lines @@
     case MediaVolumeSliderThumbPart:
     case MediaFullScreenVolumeSliderPart:
     case MediaFullScreenVolumeSliderThumbPart:
         return mediaSliderContainer;
     default:
         return sliderContainer;
     }
 }
 
 } // namespace blink