Make virtual keyboard work on supervised user creation

ash/shell.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 ASH_SHELL_H_
 #define ASH_SHELL_H_
 
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 603 matching lines @@
   friend class SmsObserverTest;
   friend class test::ShellTestApi;
   friend class shell::WindowWatcher;
 
   Shell(std::unique_ptr<ShellDelegate> shell_delegate,
         std::unique_ptr<ShellPort> shell_port);
   ~Shell() override;
 
   void Init(const ShellInitParams& init_params);
 
-  // Initializes virtual keyboard controller.
+  // Initializes virtual keyboard controller if virtual keyboard is enabled.
   void InitKeyboard();
 
   // Initializes the root window so that it can host browser windows.
   void InitRootWindow(aura::Window* root_window);
 
   void SetSystemTrayDelegate(std::unique_ptr<SystemTrayDelegate> delegate);
   void DeleteSystemTrayDelegate();
 
   // Destroys all child windows including widgets across all roots.
   void CloseAllRootWindowChildWindows();
@@ skipping 191 matching lines @@
   base::ObserverList<ShellObserver> shell_observers_;
 
   scoped_refptr<base::SequencedWorkerPool> blocking_pool_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_