chromium/third_party/blink/web_tests/http/tests/css/resources/css-resources-referrer.css

@import url(css-resources-referrer-import.css);

@font-face {
    font-family: faceInSheet;
    src: url('referrer-check.php?from=sheet&resource=font');
}

.imageInSheet {
    background-image: url('referrer-check.php?from=sheet&resource=image');
}
.imageSetInSheet {
    background-image: -webkit-image-set(
        url('referrer-check.php?from=sheet&resource=image2') 1x,
        url('referrer-check.php?from=sheet&resource=image') 2x
    );
}