Revert of Calculate paint invalidation rect for scrollbars

third_party/WebKit/Source/core/layout/LayoutTheme.cpp

 /**
  * This file is part of the theme implementation for form controls in WebCore.
  *
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Computer, Inc.
  *
  * 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.
  *
@@ skipping 430 matching lines @@
         return false;
 
     // Default implementation assumes the controls don't respond to changes in :hover state
     if (state == HoverControlState && !supportsHover(o.styleRef()))
         return false;
 
     // Assume pressed state is only responded to if the control is enabled.
     if (state == PressedControlState && !isEnabled(o))
         return false;
 
-    o.setShouldDoFullPaintInvalidationIncludingNonCompositingDescendants();
+    o.setShouldDoFullPaintInvalidation();
+    o.invalidateDisplayItemClientForNonCompositingDescendants();
     return true;
 }
 
 ControlStates LayoutTheme::controlStatesForLayoutObject(const LayoutObject& o)
 {
     ControlStates result = 0;
     if (isHovered(o)) {
         result |= HoverControlState;
         if (isSpinUpButtonPartHovered(o))
             result |= SpinUpControlState;
@@ skipping 474 matching lines @@
 
     // padding - not honored by WinIE, needs to be removed.
     style.resetPadding();
 
     // border - honored by WinIE, but looks terrible (just paints in the control box and turns off the Windows XP theme)
     // for now, we will not honor it.
     style.resetBorder();
 }
 
 } // namespace blink