Update CSS classes to use OVERRIDE / FINAL when needed

Source/core/css/CSSRegionRule.h

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Apple 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:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
@@ skipping 19 matching lines @@
 
 #ifndef CSSRegionRule_h
 #define CSSRegionRule_h
 
 #include "core/css/CSSGroupingRule.h"
 
 namespace WebCore {
 
 class StyleRuleRegion;
 
-class CSSRegionRule : public CSSGroupingRule {
+class CSSRegionRule FINAL : public CSSGroupingRule {
 public:
     static PassRefPtr<CSSRegionRule> create(StyleRuleRegion* rule, CSSStyleSheet* sheet) { return adoptRef(new CSSRegionRule(rule, sheet)); }
 
     virtual CSSRule::Type type() const OVERRIDE { return WEBKIT_REGION_RULE; }
     virtual String cssText() const OVERRIDE;
 
 private:
     CSSRegionRule(StyleRuleRegion*, CSSStyleSheet* parent);
 };
 
 DEFINE_CSS_RULE_TYPE_CASTS(CSSRegionRule, WEBKIT_REGION_RULE);
 
 }
 
 #endif // CSSRegionRule_h