Change record status: 
Project: 
Introduced in branch: 
11.5.x
Introduced in version: 
11.5.0
Description: 

\Drupal\system\CronController has moved to \Drupal\system\Controller\CronController
\Drupal\system\FileDownloadController has moved to \Drupal\system\Controller\FileDownloadController

Impacts: 
Module developers