Make Hands-Off Zero-Touch Enrollment compatibile with tests

chrome/browser/chromeos/login/screens/update_screen.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_CHROMEOS_LOGIN_SCREENS_UPDATE_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_UPDATE_SCREEN_H_
 
 #include <set>
 
 #include "base/callback.h"
@@ skipping 107 matching lines @@
   void HideErrorMessage();
   void UpdateErrorMessage(
       const NetworkState* network,
       const NetworkPortalDetector::CaptivePortalStatus status);
 
   void DelayErrorMessage();
 
   // The user requested an attempt to connect to the network should be made.
   void OnConnectRequested();
 
+  // Records the fact that we performed an update check and were notified that
+  // it was not necessary to perform the update.
+  void RecordUpdateCheckWithoutUpdate();
+
+  // Returns true if we recently performed an update check which did not lead
+  // to an update.
+  bool RecentUpdateCheckWithoutUpdate();

[xiyuan, 2017/05/09 22:03:52]

nit: RecentUpdateCheckWithoutUpdate -> ShouldCheckUpdate

[kumarniranjan, 2017/05/09 22:49:47]

Done.

+
   // Timer for the interval to wait for the reboot.
   // If reboot didn't happen - ask user to reboot manually.
   base::OneShotTimer reboot_timer_;
 
   // Returns a static InstanceSet.
   // TODO(jdufault): There should only ever be one instance of this class.
   // Remove support for supporting multiple instances. See crbug.com/672142.
   typedef std::set<UpdateScreen*> InstanceSet;
   static InstanceSet& GetInstanceSet();
 
@@ skipping 51 matching lines @@
   ErrorScreen::ConnectRequestCallbackSubscription connect_request_subscription_;
 
   base::WeakPtrFactory<UpdateScreen> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_UPDATE_SCREEN_H_