Update web classes to use OVERRIDE / FINAL when needed

Source/web/WebPagePopupImpl.h

 /*
  * Copyright (C) 2012 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 30 matching lines @@
 class Page;
 class PagePopupClient;
 class PlatformKeyboardEvent;
 }
 
 namespace blink {
 
 class PagePopupChromeClient;
 class WebViewImpl;
 
-class WebPagePopupImpl : public WebPagePopup,
-                         public PageWidgetEventHandler,
-                         public WebCore::PagePopup,
-                         public RefCounted<WebPagePopupImpl> {
+class WebPagePopupImpl FINAL :
+    public WebPagePopup,
+    public PageWidgetEventHandler,
+    public WebCore::PagePopup,
+    public RefCounted<WebPagePopupImpl> {
     WTF_MAKE_NONCOPYABLE(WebPagePopupImpl);
     WTF_MAKE_FAST_ALLOCATED;
 
 public:
     virtual ~WebPagePopupImpl();
     bool initialize(WebViewImpl*, WebCore::PagePopupClient*, const WebCore::IntRect& originBoundsInRootView);
     bool handleKeyEvent(const WebCore::PlatformKeyboardEvent&);
     void closePopup();
     WebWidgetClient* widgetClient() const { return m_widgetClient; }
     bool hasSamePopupClient(WebPagePopupImpl* other) { return other && m_popupClient == other->m_popupClient; }
@@ skipping 31 matching lines @@
     friend class PagePopupChromeClient;
 };
 
 DEFINE_TYPE_CASTS(WebPagePopupImpl, WebWidget, widget, widget->isPagePopup(), widget.isPagePopup());
 // WebPagePopupImpl is the only implementation of WebCore::PagePopup, so no
 // further checking required.
 DEFINE_TYPE_CASTS(WebPagePopupImpl, WebCore::PagePopup, popup, true, true);
 
 } // namespace blink
 #endif // WebPagePopupImpl_h