Remove unused includes from core/html .cpp files

Source/core/html/RangeInputType.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple 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 24 matching lines @@
 #include <limits>
 #include "HTMLNames.h"
 #include "core/accessibility/AXObjectCache.h"
 #include "core/dom/ExceptionCodePlaceholder.h"
 #include "core/dom/KeyboardEvent.h"
 #include "core/dom/MouseEvent.h"
 #include "core/dom/ScopedEventQueue.h"
 #include "core/dom/Touch.h"
 #include "core/dom/TouchEvent.h"
 #include "core/dom/TouchList.h"
-#include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLDataListElement.h"
 #include "core/html/HTMLDivElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLOptionElement.h"
 #include "core/html/InputTypeNames.h"
 #include "core/html/StepRange.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/html/shadow/SliderThumbElement.h"
 #include "core/platform/PlatformMouseEvent.h"
@@ skipping 334 matching lines @@
             right = middle;
     }
     const Decimal closestLeft = middle ? m_tickMarkValues[middle - 1] : Decimal::infinity(Decimal::Negative);
     const Decimal closestRight = middle != m_tickMarkValues.size() ? m_tickMarkValues[middle] : Decimal::infinity(Decimal::Positive);
     if (closestRight - value < value - closestLeft)
         return closestRight;
     return closestLeft;
 }
 
 } // namespace WebCore