Update SVG classes to use OVERRIDE / FINAL when needed

Source/core/svg/SVGFilterElement.h

Index: Source/core/svg/SVGFilterElement.h
diff --git a/Source/core/svg/SVGFilterElement.h b/Source/core/svg/SVGFilterElement.h
index f740b5c4ec3b1521f8f84f16cf7687c7fa54913f..43c3bcf766233e8b68cc68838432050d9bd28ddc 100644
--- a/Source/core/svg/SVGFilterElement.h
+++ b/Source/core/svg/SVGFilterElement.h
@@ -51,17 +51,17 @@ public:
 private:
     explicit SVGFilterElement(Document&);
 
-    virtual bool needsPendingResourceHandling() const { return false; }
+    virtual bool needsPendingResourceHandling() const OVERRIDE { return false; }
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
-    virtual void svgAttributeChanged(const QualifiedName&);
-    virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0);
+    virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE;
+    virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
 
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
     virtual bool childShouldCreateRenderer(const Node& child) const OVERRIDE;
 
-    virtual bool selfHasRelativeLengths() const;
+    virtual bool selfHasRelativeLengths() const OVERRIDE;
 
     static const AtomicString& filterResXIdentifier();
     static const AtomicString& filterResYIdentifier();