Don't start FRE from the login screen

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 2190197966cb6d336724b425f390ef2a00b3b8df..46e30e4b4a30db5ed736075655ea244840cfd830 100644
--- a/chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc
+++ b/chrome/browser/chromeos/login/enrollment/auto_enrollment_check_screen.cc
@@ -114,7 +114,10 @@ void AutoEnrollmentCheckScreen::Show() {
   auto_enrollment_state_ = new_auto_enrollment_state;
 
   // Make sure gears are in motion in the background.
-  auto_enrollment_controller_->Start();
+  if (auto_enrollment_controller_->state() ==
+      policy::AUTO_ENROLLMENT_STATE_IDLE) {
+    auto_enrollment_controller_->Start();
+  }
   network_portal_detector::GetInstance()->StartDetectionIfIdle();
 }
 
@@ -205,9 +208,6 @@ bool AutoEnrollmentCheckScreen::UpdateAutoEnrollmentState(
     policy::AutoEnrollmentState new_auto_enrollment_state) {
   switch (new_auto_enrollment_state) {
     case policy::AUTO_ENROLLMENT_STATE_IDLE:
-      // The client should have been started already.
-      NOTREACHED();
-      return false;
     case policy::AUTO_ENROLLMENT_STATE_PENDING:
     case policy::AUTO_ENROLLMENT_STATE_SERVER_ERROR:
     case policy::AUTO_ENROLLMENT_STATE_TRIGGER_ENROLLMENT: