cros: Move wallpaper after login screen is gone

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

Index: chrome/browser/chromeos/login/screens/error_screen.cc
diff --git a/chrome/browser/chromeos/login/screens/error_screen.cc b/chrome/browser/chromeos/login/screens/error_screen.cc
index a0b46cbc9624a8f7024b5e58cc79403b4594c05c..81ad0cb9f4b722850baa8cd236af202c83f89f6f 100644
--- a/chrome/browser/chromeos/login/screens/error_screen.cc
+++ b/chrome/browser/chromeos/login/screens/error_screen.cc
@@ -297,9 +297,8 @@ void ErrorScreen::OnDiagnoseButtonClicked() {
       WindowOpenDisposition::NEW_WINDOW, extensions::SOURCE_CHROME_INTERNAL));
   KioskAppManager::Get()->InitSession(profile, extension_id);
 
-  session_manager::SessionManager::Get()->SessionStarted();
-
-  LoginDisplayHost::default_host()->Finalize();
+  LoginDisplayHost::default_host()->Finalize(base::BindOnce(
+      [] { session_manager::SessionManager::Get()->SessionStarted(); }));
 }
 
 void ErrorScreen::OnLaunchOobeGuestSession() {