internal-import-stylesheet-with-differentorigin-base-url-from-preload.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /referrer-policy/css-integration/child-css/internal-import-stylesheet-with-differentorigin-base-url-from-preload.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>CSS integration - child CSS fetch from inline stylesheet</title>

<link rel="help" href="https://crbug.com/1158645" />

<head>

  <meta name="referrer" content="origin">

</head>

<body>

  <script src="/resources/testharness.js"></script>

  <script src="/resources/testharnessreport.js"></script>

  <script src="/common/utils.js"></script>

  <!-- Common global functions for referrer-policy tests. -->

  <script src="/common/security-features/resources/common.sub.js"></script>

  <script>

    promise_test(function (css_test) {

        let id = token();

        let url_prefix = location.protocol + "//www." + location.hostname +

          ":" + location.port;

        let css_url = url_prefix +

          "/common/security-features/subresource/stylesheet.py?id=" + id +

          "&type=stylesheet-only";

        let check_url = url_prefix +

          "/common/security-features/subresource/stylesheet.py" +

          "?id=" + id + "&report-headers";

        const frame = document.createElement('iframe');

        const contents = `

              <base href="http://other-site.example" />

              <style type=text/css>

                @import url('${css_url}');

              </style>`;

        frame.srcdoc = contents;

        document.body.appendChild(frame);

        return timeoutPromise(css_test, 1000)

          .then(() => requestViaXhr(check_url))

          .then(function (message) {

            assert_own_property(message, "headers");

            assert_own_property(message, "referrer");

            assert_equals(message.referrer, location.origin + "/");

});

      }, "A child stylesheet from inline style should use the document's" +

      " URL, not the document's base URL, as its referrer, even when the " +

      "HTML parser preloads the stylesheet.");

  </script>