REBOOT_REASON_UNKNOWN 322 chrome/browser/chromeos/system/automatic_reboot_manager.cc AutomaticRebootManagerObserver::REBOOT_REASON_UNKNOWN; REBOOT_REASON_UNKNOWN 379 chrome/browser/chromeos/system/automatic_reboot_manager.cc DCHECK_NE(AutomaticRebootManagerObserver::REBOOT_REASON_UNKNOWN,