Make Hands-Off Zero-Touch Enrollment compatibile with tests

chrome/browser/chromeos/login/startup_utils.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_STARTUP_UTILS_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_STARTUP_UTILS_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 41 matching lines @@
 
   // Mark a device as requiring enrollment recovery.
   static void MarkEnrollmentRecoveryRequired();
 
   // Returns initial locale from local settings.
   static std::string GetInitialLocale();
 
   // Sets initial locale in local settings.
   static void SetInitialLocale(const std::string& locale);
 
+  // Saves the time of the last update check which did not result in any update.
+  static void SaveTimeOfLastUpdateCheckWithoutUpdate(base::Time time);
+
+  // Clears the update check time which was previously saved.
+  static void ClearTimeOfLastUpdateCheckWithoutUpdate();
+
+  // Returns the time of the last update check which did not lead to an update.
+  static base::Time GetTimeOfLastUpdateCheckWithoutUpdate();
+
   // Registers OOBE preferences.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_STARTUP_UTILS_H_