FINALizing of the Node hierarchy.

Source/core/html/shadow/SliderThumbElement.h

Index: Source/core/html/shadow/SliderThumbElement.h
diff --git a/Source/core/html/shadow/SliderThumbElement.h b/Source/core/html/shadow/SliderThumbElement.h
index 5b8068f6b328955f7be2621e7422d402931685cb..2aeaad4a6fbbf35b19e1d7686234e34d27eeb8c1 100644
--- a/Source/core/html/shadow/SliderThumbElement.h
+++ b/Source/core/html/shadow/SliderThumbElement.h
@@ -46,7 +46,7 @@ class HTMLInputElement;
 class Event;
 class FloatPoint;
 
-class SliderThumbElement : public HTMLDivElement {
+class SliderThumbElement FINAL : public HTMLDivElement {
 public:
     static PassRefPtr<SliderThumbElement> create(Document*);
 
@@ -104,7 +104,7 @@ HTMLElement* sliderTrackElementOf(Node*);
 
 // --------------------------------
 
-class RenderSliderThumb : public RenderBlock {
+class RenderSliderThumb FINAL : public RenderBlock {
 public:
     RenderSliderThumb(SliderThumbElement*);
     void updateAppearance(RenderStyle* parentStyle);
@@ -115,7 +115,7 @@ private:
 
 // --------------------------------
 
-class SliderContainerElement : public HTMLDivElement {
+class SliderContainerElement FINAL : public HTMLDivElement {
 public:
     static PassRefPtr<SliderContainerElement> create(Document*);