Standardize usage of virtual/override/final in mojo/

mojo/services/public/cpp/view_manager/view_manager_client_factory.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 MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_MANAGER_CLIENT_FACTORY_H_
 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_MANAGER_CLIENT_FACTORY_H_
 
 #include "mojo/public/cpp/application/interface_factory.h"
 #include "mojo/services/public/interfaces/view_manager/view_manager.mojom.h"
 
 namespace mojo {
 
 class ViewManagerDelegate;
 class Shell;
 
 // Add an instance of this class to an incoming connection to allow it to
 // instantiate ViewManagerClient implementations in response to
 // ViewManagerClient requests.
 class ViewManagerClientFactory : public InterfaceFactory<ViewManagerClient> {
  public:
   ViewManagerClientFactory(Shell* shell, ViewManagerDelegate* delegate);
-  virtual ~ViewManagerClientFactory();
+  ~ViewManagerClientFactory() override;
 
   // InterfaceFactory<ViewManagerClient> implementation.
-  virtual void Create(ApplicationConnection* connection,
-                      InterfaceRequest<ViewManagerClient> request) override;
+  void Create(ApplicationConnection* connection,
+              InterfaceRequest<ViewManagerClient> request) override;
 
  private:
   Shell* shell_;
   ViewManagerDelegate* delegate_;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_MANAGER_CLIENT_FACTORY_H_