Convert multi-profile user behavior string to enum and send it to UI.

chrome/browser/chromeos/login/screens/user_selection_screen.cc

Index: chrome/browser/chromeos/login/screens/user_selection_screen.cc
diff --git a/chrome/browser/chromeos/login/screens/user_selection_screen.cc b/chrome/browser/chromeos/login/screens/user_selection_screen.cc
index 8e0c8c560739f467f38cac373d0ad2ce07ab331a..8116cb60a4c8bbdc3dd6db7656f36ae6dddd42a8 100644
--- a/chrome/browser/chromeos/login/screens/user_selection_screen.cc
+++ b/chrome/browser/chromeos/login/screens/user_selection_screen.cc
@@ -337,7 +337,10 @@ void UserSelectionScreen::FillMultiProfileUserPrefs(
       default:
         behavior = multi_profile_user_controller->GetCachedValue(user_id);
     }
-    user_dict->SetString(kKeyMultiProfilesPolicy, behavior);
+    MultiProfileUserController::MultiProfileUserBehavior user_behavior =
+        MultiProfileUserController::UserBehaviorStringToEnum(behavior);
+    user_dict->SetInteger(kKeyMultiProfilesPolicy,
+                          static_cast<int>(user_behavior));
   } else {
     user_dict->SetBoolean(kKeyMultiProfilesAllowed, true);
   }