ChromeOS: Implement periodic timezone refresh on geolocation data.

chrome/browser/chromeos/login/users/chrome_user_manager_impl.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 CHROME_BROWSER_CHROMEOS_LOGIN_USERS_CHROME_USER_MANAGER_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_CHROME_USER_MANAGER_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 176 matching lines @@
 
   // Lazily creates default user flow.
   UserFlow* GetDefaultUserFlow() const;
 
   // MultiProfileUserControllerDelegate implementation:
   void OnUserNotAllowed(const std::string& user_email) override;
 
   // Update the number of users.
   void UpdateNumberOfUsers();
 
+  // Starts (or stops) automatic timezone refresh on geolocation,
+  // depending on user preferences.
+  void UpdateUserTimeZoneRefresher(Profile* profile);
+
   // Interface to the signed settings store.
   CrosSettings* cros_settings_;
 
   // Interface to device-local account definitions and associated policy.
   policy::DeviceLocalAccountPolicyService* device_local_account_policy_service_;
 
   content::NotificationRegistrar registrar_;
 
   // User avatar managers.
   UserImageManagerMap user_image_managers_;
@@ skipping 25 matching lines @@
       wallpaper_policy_observer_;
 
   base::WeakPtrFactory<ChromeUserManagerImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeUserManagerImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_CHROME_USER_MANAGER_IMPL_H_