Import //fetch from Web Platform Tests.

third_party/WebKit/LayoutTests/external/wpt/fetch/api/policies/referrer-no-referrer.js

+if (this.document === undefined) {
+  importScripts("/resources/testharness.js");
+  importScripts("../resources/utils.js");
+}
+
+var fetchedUrl = RESOURCES_DIR + "inspect-headers.py?headers=origin";
+
+promise_test(function(test) {
+  return fetch(fetchedUrl).then(function(resp) {
+    assert_equals(resp.status, 200, "HTTP status is 200");
+    assert_equals(resp.type , "basic", "Response's type is basic");
+    var referrer = resp.headers.get("x-request-referer");
+    //Either no referrer header is sent or it is empty
+    if (referrer)
+      assert_equals(referrer, "", "request's referrer is empty");
+  });
+}, "Request's referrer is empty");
+
+done();