Update SVG classes to use OVERRIDE / FINAL when needed

Source/core/svg/SVGGElement.h

Index: Source/core/svg/SVGGElement.h
diff --git a/Source/core/svg/SVGGElement.h b/Source/core/svg/SVGGElement.h
index fd725355a6b18f9305c6f5ff28430c5992b9e783..be8fd5e216dd399291275ee18c2aff4df0fd710f 100644
--- a/Source/core/svg/SVGGElement.h
+++ b/Source/core/svg/SVGGElement.h
@@ -33,17 +33,17 @@ public:
 protected:
     explicit SVGGElement(Document&, ConstructionType = CreateSVGElement);
 
-    virtual RenderObject* createRenderer(RenderStyle*);
+    virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
 
 private:
-    virtual bool isValid() const { return SVGTests::isValid(); }
+    virtual bool isValid() const OVERRIDE { return SVGTests::isValid(); }
     virtual bool supportsFocus() const OVERRIDE { return hasFocusEventListeners(); }
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
-    virtual void svgAttributeChanged(const QualifiedName&);
+    virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE;
 
-    virtual bool rendererIsNeeded(const RenderStyle&);
+    virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE;
 
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGGElement)
     END_DECLARE_ANIMATED_PROPERTIES