Update remaining core classes to use OVERRIDE / FINAL when needed

Source/core/timing/PerformanceMark.h

 /*
  * Copyright (C) 2012 Intel 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 disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
 
 #ifndef PerformanceMark_h
 #define PerformanceMark_h
 
 #include "core/timing/PerformanceEntry.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class PerformanceMark : public PerformanceEntry {
+class PerformanceMark FINAL : public PerformanceEntry {
 public:
     static PassRefPtr<PerformanceMark> create(const String& name, double startTime) { return adoptRef(new PerformanceMark(name, startTime)); }
 
-    virtual bool isMark() { return true; }
+    virtual bool isMark() OVERRIDE { return true; }
 
 private:
     PerformanceMark(const String& name, double startTime) : PerformanceEntry(name, "mark", startTime, startTime)
     {
         ScriptWrappable::init(this);
     }
 
-    ~PerformanceMark() { }
+    virtual ~PerformanceMark() { }
 };
 
 }
 
 #endif // !defined(PerformanceMark_h)