Remove more #includes from Frame.h

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 18 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 
 #include "config.h"
 #include "SliderThumbElement.h"
 
 #include "CSSValueKeywords.h"
 #include "ElementShadow.h"
 #include "Event.h"
+#include "EventHandler.h"
 #include "Frame.h"
 #include "HTMLInputElement.h"
 #include "HTMLParserIdioms.h"
 #include "MouseEvent.h"
 #include "RenderFlexibleBox.h"
 #include "RenderSlider.h"
 #include "RenderTheme.h"
 #include "ShadowRoot.h"
 #include "StepRange.h"
 #include <wtf/MathExtras.h>
@@ skipping 428 matching lines @@
     case MediaVolumeSliderThumbPart:
     case MediaFullScreenVolumeSliderPart:
     case MediaFullScreenVolumeSliderThumbPart:
         return mediaSliderContainer;
     default:
         return sliderContainer;
     }
 }
 
 }