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

chrome/browser/ui/cocoa/javascript_app_modal_dialog_cocoa.h

 // Copyright (c) 2012 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_JAVASCRIPT_APP_MODAL_DIALOG_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_JAVASCRIPT_APP_MODAL_DIALOG_COCOA_H_
 
 #include "chrome/browser/ui/app_modal_dialogs/native_app_modal_dialog.h"
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 
 #if __OBJC__
 @class NSAlert;
 @class JavaScriptAppModalDialogHelper;
 #else
 class NSAlert;
 class JavaScriptAppModalDialogHelper;
 #endif
 
 class JavaScriptAppModalDialogCocoa : public NativeAppModalDialog {
  public:
   explicit JavaScriptAppModalDialogCocoa(JavaScriptAppModalDialog* dialog);
   virtual ~JavaScriptAppModalDialogCocoa();
 
   // Overridden from NativeAppModalDialog:
-  virtual int GetAppModalDialogButtons() const override;
-  virtual void ShowAppModalDialog() override;
-  virtual void ActivateAppModalDialog() override;
-  virtual void CloseAppModalDialog() override;
-  virtual void AcceptAppModalDialog() override;
-  virtual void CancelAppModalDialog() override;
+  int GetAppModalDialogButtons() const override;
+  void ShowAppModalDialog() override;
+  void ActivateAppModalDialog() override;
+  void CloseAppModalDialog() override;
+  void AcceptAppModalDialog() override;
+  void CancelAppModalDialog() override;
 
   JavaScriptAppModalDialog* dialog() const { return dialog_.get(); }
 
  private:
   // Returns the NSAlert associated with the modal dialog.
   NSAlert* GetAlert() const;
 
   scoped_ptr<JavaScriptAppModalDialog> dialog_;
 
   // Created in the constructor and destroyed in the destructor.
   base::scoped_nsobject<JavaScriptAppModalDialogHelper> helper_;
 
   DISALLOW_COPY_AND_ASSIGN(JavaScriptAppModalDialogCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_JAVASCRIPT_APP_MODAL_DIALOG_COCOA_H_