Update SVG classes to use OVERRIDE / FINAL when needed

Source/core/svg/SVGLengthList.h

Index: Source/core/svg/SVGLengthList.h
diff --git a/Source/core/svg/SVGLengthList.h b/Source/core/svg/SVGLengthList.h
index 3d9b622a7a639bf822f3f3a4401f1fc6dbc92182..0b65bad3a1c9d11dca61942520f3df35980122c4 100644
--- a/Source/core/svg/SVGLengthList.h
+++ b/Source/core/svg/SVGLengthList.h
@@ -39,7 +39,7 @@ namespace WebCore {
 
 class SVGLengthListTearOff;
 
-class SVGLengthList : public NewSVGListPropertyHelper<SVGLengthList, SVGLength> {
+class SVGLengthList FINAL : public NewSVGListPropertyHelper<SVGLengthList, SVGLength> {
 public:
     typedef SVGLengthListTearOff TearOffType;
 
@@ -48,7 +48,7 @@ public:
         return adoptRef(new SVGLengthList(mode));
     }
 
-    ~SVGLengthList();
+    virtual ~SVGLengthList();
 
     PassRefPtr<SVGLengthList> clone();