ChromeOS: Implement periodic timezone refresh on geolocation data.

chrome/browser/chromeos/login/users/chrome_user_manager_impl.h

Index: chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
diff --git a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
index eb35a872b5e19c1fbd6bbf0cc4cee318896d9fc4..ac19f4742f748b8f9272ae41c37485df411a8760 100644
--- a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
+++ b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
@@ -198,6 +198,10 @@ class ChromeUserManagerImpl
   // Update the number of users.
   void UpdateNumberOfUsers();
 
+  // Starts (or stops) automatic timezone refresh on geolocation,
+  // depending on user preferences.
+  void StartUserTimeZoneRefresh(Profile* profile);
+
   // Interface to the signed settings store.
   CrosSettings* cros_settings_;