Implement users options handling in login screen.

chrome/browser/prefs/browser_prefs.cc

Index: chrome/browser/prefs/browser_prefs.cc
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 075cbf1f22bf65094647705eb1502d5059591c24..7a5a30501c52675518d97a99575d8f9a14cd7940 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -59,6 +59,7 @@
 #endif
 
 #if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/cros_settings_provider_user.h"
 #include "chrome/browser/chromeos/login/apply_services_customization.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
@@ -96,6 +97,7 @@ void RegisterLocalState(PrefService* local_state) {
   AutoFillManager::RegisterBrowserPrefs(local_state);
 #if defined(OS_CHROMEOS)
   chromeos::UserManager::RegisterPrefs(local_state);
+  chromeos::UserCrosSettingsProvider::RegisterPrefs(local_state);
   WizardController::RegisterPrefs(local_state);
   chromeos::LanguageMenuButton::RegisterPrefs(local_state);
   chromeos::ApplyServicesCustomization::RegisterPrefs(local_state);