Update SVG classes to use OVERRIDE / FINAL when needed

Source/core/svg/SVGImageElement.h

Index: Source/core/svg/SVGImageElement.h
diff --git a/Source/core/svg/SVGImageElement.h b/Source/core/svg/SVGImageElement.h
index 15fd0f089bdc941820c60c0f2fe9720f26244245..fc9d88f6ad1ba1cce1c3aac9472d072a2bc5e355 100644
--- a/Source/core/svg/SVGImageElement.h
+++ b/Source/core/svg/SVGImageElement.h
@@ -46,26 +46,26 @@ public:
 private:
     explicit SVGImageElement(Document&);
 
-    virtual bool isValid() const { return SVGTests::isValid(); }
-    virtual bool isStructurallyExternal() const { return !hrefCurrentValue().isNull(); }
+    virtual bool isValid() const OVERRIDE { return SVGTests::isValid(); }
+    virtual bool isStructurallyExternal() const OVERRIDE { return !hrefCurrentValue().isNull(); }
     virtual bool supportsFocus() const OVERRIDE { return hasFocusEventListeners(); }
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
     virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) OVERRIDE;
-    virtual void svgAttributeChanged(const QualifiedName&);
+    virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE;
 
     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
 
-    virtual RenderObject* createRenderer(RenderStyle*);
+    virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
 
     virtual const AtomicString imageSourceURL() const OVERRIDE;
 
-    virtual bool haveLoadedRequiredResources();
+    virtual bool haveLoadedRequiredResources() OVERRIDE;
 
-    virtual bool selfHasRelativeLengths() const;
+    virtual bool selfHasRelativeLengths() const OVERRIDE;
     virtual void didMoveToNewDocument(Document& oldDocument) OVERRIDE;
 
     RefPtr<SVGAnimatedLength> m_x;