chromium/third_party/blink/web_tests/http/tests/css/resources/slow-loading-sheet-in-error.php

<?php
// We sleep here so that we are have enough time to test the different attributes before the stylesheet is fully loaded.
usleep(100);

header("HTTP/1.0 500 Internal Error");
header("Expires: Thu, 01 Dec 2003 16:00:00 GMT");
header("Cache-Control: no-cache, no-store, must-revalidate");
header("Pragma: no-cache");
header("Content-Type: text/css");

ob_flush();
flush();
?>