[ServiceWorker] Use the cookie which is differnt from the username in LayoutTest.

LayoutTests/http/tests/serviceworker/fetch-cors-xhr.html

Index: LayoutTests/http/tests/serviceworker/fetch-cors-xhr.html
diff --git a/LayoutTests/http/tests/serviceworker/fetch-cors-xhr.html b/LayoutTests/http/tests/serviceworker/fetch-cors-xhr.html
index de805daf9deefc7ac24ff59478b94a311dbf3cff..c0adfe3075fbbc9c417c6ac65a6dc4ab2d1030fd 100644
--- a/LayoutTests/http/tests/serviceworker/fetch-cors-xhr.html
+++ b/LayoutTests/http/tests/serviceworker/fetch-cors-xhr.html
@@ -7,9 +7,11 @@
 <script>
 async_test(function(t) {
     var login1 =
-      test_login(t, 'http://127.0.0.1:8000', 'username1', 'password1');
+      test_login(t, 'http://127.0.0.1:8000',
+                 'username1', 'password1', 'cookie1');
     var login2 =
-      test_login(t, 'http://localhost:8000', 'username2', 'password2');
+      test_login(t, 'http://localhost:8000',
+                 'username2', 'password2', 'cookie2');
     var SCOPE = 'resources/fetch-cors-xhr-iframe.html';
     var SCRIPT = 'resources/fetch-rewrite-worker.js';
     var host_info = get_host_info();