Add an update warning for downloading over mobile data

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

Index: chrome/browser/chromeos/login/screens/update_screen.cc
diff --git a/chrome/browser/chromeos/login/screens/update_screen.cc b/chrome/browser/chromeos/login/screens/update_screen.cc
index 96a797ed24a134e20f9afe24d7822205b133bc7b..e1be946158c80fe2f9ce21737c7a9c15c4ff68b9 100644
--- a/chrome/browser/chromeos/login/screens/update_screen.cc
+++ b/chrome/browser/chromeos/login/screens/update_screen.cc
@@ -197,6 +197,7 @@ void UpdateScreen::ExitUpdate(UpdateScreen::ExitReason reason) {
         case UpdateEngineClient::UPDATE_STATUS_DOWNLOADING:
         case UpdateEngineClient::UPDATE_STATUS_FINALIZING:
         case UpdateEngineClient::UPDATE_STATUS_VERIFYING:
+        case UpdateEngineClient::UPDATE_STATUS_NEED_PERMISSION_TO_UPDATE:
           DCHECK(!HasCriticalUpdate());
         // Noncritical update, just exit screen as if there is no update.
         // no break
@@ -330,6 +331,7 @@ void UpdateScreen::UpdateStatusChanged(
       // else no break
     case UpdateEngineClient::UPDATE_STATUS_ERROR:
     case UpdateEngineClient::UPDATE_STATUS_REPORTING_ERROR_EVENT:
+    case UpdateEngineClient::UPDATE_STATUS_NEED_PERMISSION_TO_UPDATE:
       ExitUpdate(REASON_UPDATE_ENDED);
       break;
     default: