cros: Move BaseScreenDelegate::ExitCodes into separate file, ScreenExitCode.

chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc

Index: chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc
diff --git a/chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc b/chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc
index 9f7e45d3c70ddbf1c2746fac4671140c1cd7d548..2190197966cb6d336724b425f390ef2a00b3b8df 100644
--- a/chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc
+++ b/chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc
@@ -248,9 +248,9 @@ void AutoEnrollmentCheckScreen::SignalCompletion() {
   // their work before.
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
-      base::Bind(
-          &AutoEnrollmentCheckScreen::Finish, weak_ptr_factory_.GetWeakPtr(),
-          BaseScreenDelegate::ENTERPRISE_AUTO_ENROLLMENT_CHECK_COMPLETED));
+      base::Bind(&AutoEnrollmentCheckScreen::Finish,
+                 weak_ptr_factory_.GetWeakPtr(),
+                 ScreenExitCode::ENTERPRISE_AUTO_ENROLLMENT_CHECK_COMPLETED));
 }
 
 bool AutoEnrollmentCheckScreen::IsCompleted() const {