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

Source/WebCore/rendering/RenderScrollbarPart.cpp

Index: Source/WebCore/rendering/RenderScrollbarPart.cpp
diff --git a/Source/WebCore/rendering/RenderScrollbarPart.cpp b/Source/WebCore/rendering/RenderScrollbarPart.cpp
index e17b853e717a03096eeaa04f1b96de2367fa4869..49e884ddc1e7b8569616e271d7338ba0d136bd59 100644
--- a/Source/WebCore/rendering/RenderScrollbarPart.cpp
+++ b/Source/WebCore/rendering/RenderScrollbarPart.cpp
@@ -140,15 +140,15 @@ void RenderScrollbarPart::computePreferredLogicalWidths()
     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);