Update more svg classes to use OVERRIDE / FINAL when needed

Source/core/svg/SVGTextContentElement.cpp

Index: Source/core/svg/SVGTextContentElement.cpp
diff --git a/Source/core/svg/SVGTextContentElement.cpp b/Source/core/svg/SVGTextContentElement.cpp
index 0da391b7078dd1aa7648f1e8968014aafee00983..a0ffd03c43dcfaf1a1881264cf2049c3f574ace5 100644
--- a/Source/core/svg/SVGTextContentElement.cpp
+++ b/Source/core/svg/SVGTextContentElement.cpp
@@ -40,14 +40,14 @@ namespace WebCore {
 
 // SVGTextContentElement's 'textLength' attribute needs special handling.
 // It should return getComputedTextLength() when textLength is not specified manually.
-class SVGAnimatedTextLength : public SVGAnimatedLength {
+class SVGAnimatedTextLength FINAL : public SVGAnimatedLength {
 public:
     static PassRefPtr<SVGAnimatedTextLength> create(SVGTextContentElement* contextElement)
     {
         return adoptRef(new SVGAnimatedTextLength(contextElement));
     }
 
-    virtual SVGLengthTearOff* baseVal()
+    virtual SVGLengthTearOff* baseVal() OVERRIDE
     {
         SVGTextContentElement* textContentElement = toSVGTextContentElement(contextElement());
         if (!textContentElement->textLengthIsSpecifiedByUser())