cros: Replace WizardController string constants with OobeScreen values.

chrome/browser/chromeos/login/session/chrome_session_manager.cc

Index: chrome/browser/chromeos/login/session/chrome_session_manager.cc
diff --git a/chrome/browser/chromeos/login/session/chrome_session_manager.cc b/chrome/browser/chromeos/login/session/chrome_session_manager.cc
index 9845fa8428bda2a2ea63cb0334747a9a62da4dc1..d50cfdd9f2f6f08cc8655bf75f25bb0ac60fe20f 100644
--- a/chrome/browser/chromeos/login/session/chrome_session_manager.cc
+++ b/chrome/browser/chromeos/login/session/chrome_session_manager.cc
@@ -66,7 +66,7 @@ void StartKioskSession() {
   session_manager::SessionManager::Get()->SetSessionState(
       session_manager::SessionState::LOGIN_PRIMARY);
 
-  ShowLoginWizard(chromeos::WizardController::kAppLaunchSplashScreenName);
+  ShowLoginWizard(chromeos::OobeScreen::SCREEN_APP_LAUNCH_SPLASH);
 
   // Login screen is skipped but 'login-prompt-visible' signal is still needed.
   VLOG(1) << "Kiosk app auto launch >> login-prompt-visible";
@@ -76,7 +76,7 @@ void StartKioskSession() {
 // Starts the login/oobe screen.
 void StartLoginOobeSession() {
   // State will be defined once out-of-box/login branching is complete.
-  ShowLoginWizard(std::string());
+  ShowLoginWizard(OobeScreen::SCREEN_UNKNOWN);
 
   // Reset reboot after update flag when login screen is shown.
   policy::BrowserPolicyConnectorChromeOS* connector =