Use ReferrerInfo class in document: update code after merge conflict. a=merge-conflict CLOSED TREE

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1534681
gecko-commit: b055270d5a52c72dc51acc8d958b515027ba602d
gecko-integration-branch: central
gecko-reviewers: merge-conflict
diff --git a/referrer-policy/generic/inheritance/iframe-inheritance-srcdoc-child.html b/referrer-policy/generic/inheritance/iframe-inheritance-srcdoc-child.html
index 4bff306..08acb40 100644
--- a/referrer-policy/generic/inheritance/iframe-inheritance-srcdoc-child.html
+++ b/referrer-policy/generic/inheritance/iframe-inheritance-srcdoc-child.html
@@ -31,7 +31,7 @@
             `<script src = "${BASE}/common/security-features/resources/common.js"></sc` + `ript>
             <script src = "${BASE}/referrer-policy/generic/referrer-policy-test-case.js"></sc` + `ript>
             <script>
-              var urlPath = "/referrer-policy/generic/subresource/xhr.py";
+              var urlPath = "/common/security-features/subresource/xhr.py";
               var url = "${BASE}" + urlPath;
               requestViaXhr(url).then((msg) => {
                   window.top.postMessage({referrer: msg.referrer}, "*")})