Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/cocoa/profiles/profile_signin_confirmation_dialog_cocoa.h

 // Copyright 2014 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 CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_SIGNIN_CONFIRMATION_DIALOG_COCOA_
 #define CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_SIGNIN_CONFIRMATION_DIALOG_COCOA_
 
 #import <Cocoa/Cocoa.h>
 
 #include <string>
@@ skipping 28 matching lines @@
       const std::string& username,
       ui::ProfileSigninConfirmationDelegate* delegate,
       bool offer_profile_creation);
   virtual ~ProfileSigninConfirmationDialogCocoa();
 
   // Closes the dialog, which deletes itself.
   void Close();
 
  private:
   // ConstrainedWindowMacDelegate:
-  virtual void OnConstrainedWindowClosed(ConstrainedWindowMac* window) override;
+  void OnConstrainedWindowClosed(ConstrainedWindowMac* window) override;
 
   // Controller for the dialog view.
   base::scoped_nsobject<ProfileSigninConfirmationViewController> controller_;
 
   // The constrained window that contains the dialog view.
   scoped_ptr<ConstrainedWindowMac> window_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSigninConfirmationDialogCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_PROFILES_PROFILE_SIGNIN_CONFIRMATION_DIALOG_COCOA_