Add StyleChangeState to get rid of a bunch of static state in the render tree.

Source/WebCore/rendering/RenderScrollbarPart.cpp

 /*
  * Copyright (C) 2008 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 122 matching lines @@
 void RenderScrollbarPart::computePreferredLogicalWidths()
 {
     if (!preferredLogicalWidthsDirty())
         return;
     
     m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = 0;
 
     setPreferredLogicalWidthsDirty(false);
 }
 
-void RenderScrollbarPart::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)
+void RenderScrollbarPart::styleWillChange(StyleDifference diff, const RenderStyle* newStyle, StyleChangeState& state)
 {
-    RenderBlock::styleWillChange(diff, newStyle);
+    RenderBlock::styleWillChange(diff, newStyle, state);
     setInline(false);
 }
 
-void RenderScrollbarPart::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
+void RenderScrollbarPart::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle, const StyleChangeState& state)
 {
-    RenderBlock::styleDidChange(diff, oldStyle);
+    RenderBlock::styleDidChange(diff, oldStyle, state);
     setInline(false);
     clearPositionedState();
     setFloating(false);
     setHasOverflowClip(false);
     if (oldStyle && m_scrollbar && m_part != NoPart && diff >= StyleDifferenceRepaint)
         m_scrollbar->theme()->invalidatePart(m_scrollbar, m_part);
 }
 
 void RenderScrollbarPart::imageChanged(WrappedImagePtr image, const IntRect* rect)
 {
@@ skipping 35 matching lines @@
 }
 
 RenderObject* RenderScrollbarPart::rendererOwningScrollbar() const
 {
     if (!m_scrollbar)
         return 0;
     return m_scrollbar->owningRenderer();
 }
 
 }