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

Source/WebCore/rendering/RenderRegion.cpp

Index: Source/WebCore/rendering/RenderRegion.cpp
diff --git a/Source/WebCore/rendering/RenderRegion.cpp b/Source/WebCore/rendering/RenderRegion.cpp
index 6a08b5c745fca1f700eb1c2fdd56278008f0b842..99a83e349bde1577f61cde4a2d8849cb1e98cf1a 100644
--- a/Source/WebCore/rendering/RenderRegion.cpp
+++ b/Source/WebCore/rendering/RenderRegion.cpp
@@ -249,9 +249,9 @@ bool RenderRegion::shouldHaveAutoLogicalHeight() const
     return style()->logicalHeight().isAuto() && !hasAnchoredEndpointsForHeight;
 }
     
-void RenderRegion::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
+void RenderRegion::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle, const StyleChangeState& state)
 {
-    RenderBlock::styleDidChange(diff, oldStyle);
+    RenderBlock::styleDidChange(diff, oldStyle, state);
 
     // If the region is not attached to any thread, there is no need to check
     // whether the region has region styling since no content will be displayed