Standardize usage of virtual/override/final in content/

content/shell/browser/notify_done_forwarder.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_SHELL_BROWSER_NOTIFY_DONE_FORWARDER_H_
 #define CONTENT_SHELL_BROWSER_NOTIFY_DONE_FORWARDER_H_
 
 #include "base/basictypes.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 
 namespace content {
 
 class NotifyDoneForwarder : public WebContentsObserver,
                             public WebContentsUserData<NotifyDoneForwarder> {
  public:
-  virtual ~NotifyDoneForwarder();
+  ~NotifyDoneForwarder() override;
 
   // WebContentsObserver implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
 
  private:
   friend class WebContentsUserData<NotifyDoneForwarder>;
 
   explicit NotifyDoneForwarder(WebContents* web_contents);
 
   void OnTestFinishedInSecondaryWindow();
 
   DISALLOW_COPY_AND_ASSIGN(NotifyDoneForwarder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_NOTIFY_DONE_FORWARDER_H_