Update SVG classes to use OVERRIDE / FINAL when needed

Source/core/svg/SVGMarkerElement.h

Index: Source/core/svg/SVGMarkerElement.h
diff --git a/Source/core/svg/SVGMarkerElement.h b/Source/core/svg/SVGMarkerElement.h
index 8d2144185b26aaf40002b113edfa1b75a6125b5d..b3b682845235e71c212e4304374d65b22e3fabd2 100644
--- a/Source/core/svg/SVGMarkerElement.h
+++ b/Source/core/svg/SVGMarkerElement.h
@@ -134,17 +134,17 @@ public:
 private:
     explicit SVGMarkerElement(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*);
-    virtual bool rendererIsNeeded(const RenderStyle&) { return true; }
+    virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
+    virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE { return true; }
 
-    virtual bool selfHasRelativeLengths() const;
+    virtual bool selfHasRelativeLengths() const OVERRIDE;
 
     void synchronizeOrientType();