REBOOT_REASON_PERIODIC   98 chrome/browser/chromeos/app_mode/kiosk_app_update_service.cc     case REBOOT_REASON_PERIODIC:
REBOOT_REASON_PERIODIC  331 chrome/browser/chromeos/system/automatic_reboot_manager.cc     reboot_reason = AutomaticRebootManagerObserver::REBOOT_REASON_PERIODIC;