Update SVG classes to use OVERRIDE / FINAL when needed

Source/core/svg/SVGLengthTearOff.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #ifndef SVGLengthTearOff_h
 #define SVGLengthTearOff_h
 
 #include "core/svg/SVGLength.h"
 #include "core/svg/properties/NewSVGPropertyTearOff.h"
 
 namespace WebCore {
 
-class SVGLengthTearOff : public NewSVGPropertyTearOff<SVGLength>, public ScriptWrappable {
+class SVGLengthTearOff FINAL : public NewSVGPropertyTearOff<SVGLength>, public ScriptWrappable {
 public:
     // Forward declare these enums in the w3c naming scheme, for IDL generation
     enum {
         SVG_LENGTHTYPE_UNKNOWN = LengthTypeUnknown,
         SVG_LENGTHTYPE_NUMBER = LengthTypeNumber,
         SVG_LENGTHTYPE_PERCENTAGE = LengthTypePercentage,
         SVG_LENGTHTYPE_EMS = LengthTypeEMS,
         SVG_LENGTHTYPE_EXS = LengthTypeEXS,
         SVG_LENGTHTYPE_PX = LengthTypePX,
         SVG_LENGTHTYPE_CM = LengthTypeCM,
@@ skipping 19 matching lines @@
     void newValueSpecifiedUnits(unsigned short unitType, float valueInSpecifiedUnits, ExceptionState&);
     void convertToSpecifiedUnits(unsigned short unitType, ExceptionState&);
 
 private:
     SVGLengthTearOff(PassRefPtr<SVGLength>, SVGElement* contextElement, PropertyIsAnimValType, const QualifiedName& attributeName = nullQName());
 };
 
 } // namespace WebCore
 
 #endif // SVGLengthTearOff_h_