Update remaining core classes to use OVERRIDE / FINAL when needed

Source/core/plugins/DOMPluginArray.h

 /*
     Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
     Copyright (C) 2008 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
@@ skipping 16 matching lines @@
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class Frame;
 class PluginData;
 
-class DOMPluginArray : public ScriptWrappable, public RefCounted<DOMPluginArray>, public DOMWindowProperty {
+class DOMPluginArray FINAL : public ScriptWrappable, public RefCounted<DOMPluginArray>, public DOMWindowProperty {
 public:
     static PassRefPtr<DOMPluginArray> create(Frame* frame) { return adoptRef(new DOMPluginArray(frame)); }
-    ~DOMPluginArray();
+    virtual ~DOMPluginArray();
 
     unsigned length() const;
     PassRefPtr<DOMPlugin> item(unsigned index);
     bool canGetItemsForName(const AtomicString& propertyName);
     PassRefPtr<DOMPlugin> namedItem(const AtomicString& propertyName);
 
     void refresh(bool reload);
 
 private:
     explicit DOMPluginArray(Frame*);
     PluginData* pluginData() const;
 };
 
 } // namespace WebCore
 
 #endif // PluginArray_h