Update web classes to use OVERRIDE / FINAL when needed

Source/web/PopupListBox.h

 /*
  * Copyright (c) 2011, 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 66 matching lines @@
     String label;
     Type type;
     int yOffset; // y offset of this item, relative to the top of the popup.
     TextDirection textDirection;
     bool hasTextDirectionOverride;
     bool enabled;
 };
 
 // This class uses WebCore code to paint and handle events for a drop-down list
 // box ("combobox" on Windows).
-class PopupListBox : public FramelessScrollView, public PopupContent {
+class PopupListBox FINAL : public FramelessScrollView, public PopupContent {
 public:
     static PassRefPtr<PopupListBox> create(PopupMenuClient* client, bool deviceSupportsTouch)
     {
         return adoptRef(new PopupListBox(client, deviceSupportsTouch));
     }
 
     // FramelessScrollView
     virtual void paint(GraphicsContext*, const IntRect&) OVERRIDE;
     virtual bool handleMouseDownEvent(const PlatformMouseEvent&) OVERRIDE;
     virtual bool handleMouseMoveEvent(const PlatformMouseEvent&) OVERRIDE;
@@ skipping 173 matching lines @@
     // If width exeeds screen width, we have to clip it.
     int m_maxWindowWidth;
 
     // To forward last mouse release event.
     RefPtr<Element> m_focusedElement;
 };
 
 } // namespace WebCore
 
 #endif