Issue #3481160: XsendfileImageStyleDownloadController::deliver() has wrong signature
requested to merge issue/xsendfile-3481160:3481160-xsendfileimagestyledownloadcontrollerdeliver-has-wrong into 8.x-1.x
Update the signature and code of the function to bring it in line with the current implementation of Drupal\image\Controller\ImageStyleDownloadController::deliver().
Closes #3481160