Update {virtual,override,final} to follow C++11 style chrome/browser/ui/webui/chromeos.

chrome/browser/ui/webui/chromeos/touch_view_controller_delegate.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_WEBUI_CHROMEOS_TOUCH_VIEW_CONTROLLER_DELEGATE_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_TOUCH_VIEW_CONTROLLER_DELEGATE_H_
 
 #include "ash/shell_observer.h"
 #include "base/observer_list.h"
 
 namespace chromeos {
 
 // An interface for ash::MaximizeModeController.
 class TouchViewControllerDelegate : public ash::ShellObserver {
  public:
   // Observer that reports changes to the state of MaximizeModeController's
   // rotation lock.
   class Observer {
    public:
     // Invoked when maximize mode started/ended.
     virtual void OnMaximizeModeStarted() {}
     virtual void OnMaximizeModeEnded() {}
 
    protected:
     virtual ~Observer() {}
   };
 
   TouchViewControllerDelegate();
-  virtual ~TouchViewControllerDelegate();
+  ~TouchViewControllerDelegate() override;
 
   // Add/Remove observers.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // Test if the Maximize Mode is enabled or not.
   bool IsMaximizeModeEnabled() const;
 
 
  private:
   // ash::ShellObserver implementation:
-  virtual void OnMaximizeModeStarted() override;
-  virtual void OnMaximizeModeEnded() override;
+  void OnMaximizeModeStarted() override;
+  void OnMaximizeModeEnded() override;
 
   // Mode state change observers.
   ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchViewControllerDelegate);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_TOUCH_VIEW_CONTROLLER_DELEGATE_H_