Update HTML classes to use OVERRIDE / FINAL when needed

Source/core/html/HTMLFieldSetElement.h

Index: Source/core/html/HTMLFieldSetElement.h
diff --git a/Source/core/html/HTMLFieldSetElement.h b/Source/core/html/HTMLFieldSetElement.h
index e0835449cdfd45501cf1221c11dcb5341561d3c2..9921d7a6d37e5b010cc3942c16d139cd7ea3454c 100644
--- a/Source/core/html/HTMLFieldSetElement.h
+++ b/Source/core/html/HTMLFieldSetElement.h
@@ -47,11 +47,11 @@ protected:
 private:
     HTMLFieldSetElement(Document&, HTMLFormElement*);
 
-    virtual bool isEnumeratable() const { return true; }
-    virtual bool supportsFocus() const;
-    virtual RenderObject* createRenderer(RenderStyle*);
-    virtual const AtomicString& formControlType() const;
-    virtual bool recalcWillValidate() const { return false; }
+    virtual bool isEnumeratable() const OVERRIDE { return true; }
+    virtual bool supportsFocus() const OVERRIDE;
+    virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
+    virtual const AtomicString& formControlType() const OVERRIDE;
+    virtual bool recalcWillValidate() const OVERRIDE { return false; }
     virtual void childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) OVERRIDE;
     virtual bool areAuthorShadowsAllowed() const OVERRIDE { return false; }