Smaller vtbls in RenderObject

Source/core/rendering/svg/RenderSVGHiddenContainer.h

Index: Source/core/rendering/svg/RenderSVGHiddenContainer.h
diff --git a/Source/core/rendering/svg/RenderSVGHiddenContainer.h b/Source/core/rendering/svg/RenderSVGHiddenContainer.h
index 7ce8e82c358842c8f364eb625161f3c3bb85dc56..bcde982fc6460c76b5ed416ea181a7aeedbf0d05 100644
--- a/Source/core/rendering/svg/RenderSVGHiddenContainer.h
+++ b/Source/core/rendering/svg/RenderSVGHiddenContainer.h
@@ -37,9 +37,9 @@ public:
 protected:
     virtual void layout() OVERRIDE;
 
-private:
-    virtual bool isSVGHiddenContainer() const OVERRIDE FINAL { return true; }
+    virtual bool isOfType(RenderObjectType type) const OVERRIDE { return type == RenderObjectSVGHiddenContainer || RenderSVGContainer::isOfType(type); }
 
+private:
     virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL;
 
     virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject*, const PaintInvalidationState* = 0) const OVERRIDE FINAL { return LayoutRect(); }