Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/svg/RenderSVGViewportContainer.h

Index: Source/core/rendering/svg/RenderSVGViewportContainer.h
diff --git a/Source/core/rendering/svg/RenderSVGViewportContainer.h b/Source/core/rendering/svg/RenderSVGViewportContainer.h
index 427e423daa2a520e1f9918af8a110ceaaa787a78..d7c43e80f8f7ba81417e5b3b32f36b0b4e080f59 100644
--- a/Source/core/rendering/svg/RenderSVGViewportContainer.h
+++ b/Source/core/rendering/svg/RenderSVGViewportContainer.h
@@ -30,7 +30,7 @@ namespace WebCore {
 
 // This is used for non-root <svg> elements and <marker> elements, neither of which are SVGTransformable
 // thus we inherit from RenderSVGContainer instead of RenderSVGTransformableContainer
-class RenderSVGViewportContainer : public RenderSVGContainer {
+class RenderSVGViewportContainer FINAL : public RenderSVGContainer {
 public:
     explicit RenderSVGViewportContainer(SVGStyledElement*);
     FloatRect viewport() const { return m_viewport; }