Update bindings classes to use OVERRIDE / FINAL when needed

Source/bindings/v8/ScriptString.h

 /*
  * Copyright (C) 2013 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 19 matching lines @@
 
 #ifndef ScriptString_h
 #define ScriptString_h
 
 #include "bindings/v8/ScriptValue.h"
 #include "bindings/v8/V8Binding.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class ScriptString : public ScriptValue {
+class ScriptString FINAL : public ScriptValue {
 public:
     ScriptString() { }
     ScriptString(v8::Handle<v8::String> value, v8::Isolate* isolate) : ScriptValue(value, isolate) { }
 
     ScriptString concatenateWith(const String&);
     String flattenToString() const;
 };
 
 } // namespace WebCore
 
 #endif // ScriptString_h