Change LayoutState to be stack-allocated

Source/core/rendering/RenderLayerRepainter.cpp

Index: Source/core/rendering/RenderLayerRepainter.cpp
diff --git a/Source/core/rendering/RenderLayerRepainter.cpp b/Source/core/rendering/RenderLayerRepainter.cpp
index 108488b711cda6327539b245882e30ff0b424ad0..b3044c29f6c1d13efa96f63b3b07bbf8bed27089 100644
--- a/Source/core/rendering/RenderLayerRepainter.cpp
+++ b/Source/core/rendering/RenderLayerRepainter.cpp
@@ -71,7 +71,7 @@ void RenderLayerRepainter::repaintAfterLayout(bool shouldCheckForRepaint)
         // FIXME: LayoutState does not work with RenderLayers as there is not a 1-to-1
         // mapping between them and the RenderObjects. It would be neat to enable
         // LayoutState outside the layout() phase and use it here.
-        ASSERT(!view->layoutStateEnabled());
+        ASSERT(!view->layoutStateCachedOffsetsEnabled());
 
         const RenderLayerModelObject* repaintContainer = m_renderer.containerForPaintInvalidation();
         LayoutRect oldRepaintRect = m_repaintRect;