cros: Disable system tray help/lock buttons during supervised user creation

ash/test/test_session_controller_client.h

 // Copyright 2017 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_TEST_TEST_SESSION_CONTROLLER_CLIENT_H_
 #define ASH_TEST_TEST_SESSION_CONTROLLER_CLIENT_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 32 matching lines @@
   void SetCanLockScreen(bool can_lock);
   void SetShouldLockScreenAutomatically(bool should_lock);
   void SetSessionState(session_manager::SessionState state);
 
   // Creates the |count| pre-defined user sessions. The users are named by
   // numbers using "user%d@tray" template. Note that existing user sessions
   // prior this call will be removed without sending out notifications.
   void CreatePredefinedUserSessions(int count);
 
   // Adds a user session from a given display email. The display email will be
-  // canonicalized and used to construct an AccountId.
-  void AddUserSession(const std::string& display_email);
+  // canonicalized and used to construct an AccountId. |enable_settings| sets
+  // whether web UI settings are allowed.
+  void AddUserSession(const std::string& display_email,
+                      bool enable_settings = true);
 
   // Simulates screen unlocking. It is virtual so that test cases can override
   // it. The default implementation sets the session state of SessionController
   // to be ACTIVE.
   virtual void UnlockScreen();
 
   // ash::mojom::SessionControllerClient:
   void RequestLockScreen() override;
   void SwitchActiveUser(const AccountId& account_id) override;
   void CycleActiveUser(CycleUserDirection direction) override;
 
  private:
   SessionController* const controller_;
 
   // Binds to the client interface.
   mojo::Binding<ash::mojom::SessionControllerClient> binding_;
 
   int fake_session_id_ = 0;
   mojom::SessionInfoPtr session_info_;
 
   DISALLOW_COPY_AND_ASSIGN(TestSessionControllerClient);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_TEST_SESSION_CONTROLLER_CLIENT_H_