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

LayoutTests/http/tests/serviceworker/resources/fetch-access-control-util.js

 var SCOPE = 'resources/fetch-access-control-iframe.html';
 var BASE_URL = 'http://127.0.0.1:8000/serviceworker/resources/fetch-access-control.php?';
 var OTHER_BASE_URL = 'http://localhost:8000/serviceworker/resources/fetch-access-control.php?';
 var REDIRECT_URL = 'http://127.0.0.1:8000/serviceworker/resources/redirect.php?Redirect=';
 var IFRAME_URL = 'http://127.0.0.1:8000/serviceworker/resources/fetch-access-control-iframe.html';
 var WORKER_URL = 'http://127.0.0.1:8000/serviceworker/resources/fetch-access-control-worker.js';
 var IFRAME_ORIGIN = 'http://127.0.0.1:8000';
 
 // Functions to check the result from the ServiceWorker.
 var checkFetchResult = function(expected, url, data) {
@@ skipping 67 matching lines @@
                 'Request header check failed url:' + url + ' name:' + name);
 };
 var checkJsonpMethod = function(method, url, data) {
   assert_equals(data.jsonpResult,
                 'success',
                 url + ' jsonpResult must be success');
   assert_equals(data.method,
                 method,
                 'Method must match url:' + url);
 };
-var checkJsonpAuth = function(username, password, url, data) {
+var checkJsonpAuth = function(username, password, cookie, url, data) {
   assert_equals(data.jsonpResult,
                 'success',
                 url + ' jsonpResult must be success');
   assert_equals(data.username,
                 username,
                 'Username must match. url: ' + url);
   assert_equals(data.password,
                 password,
                 'Password must match. url: ' + url);
   assert_equals(data.cookie,
-                username,
+                cookie,
                 'Cookie must match. url: ' + url);
 };
 var checkJsonpError = checkJsonpResult.bind(this, 'error');
 var checkJsonpSuccess = checkJsonpResult.bind(this, 'success');
 var hasCustomHeader =
   checkJsonpHeader.bind(this, 'x-serviceworker-test', 'test');
 var noCustomHeader =
   checkJsonpHeader.bind(this, 'x-serviceworker-test', undefined);
 var methodIsGET = checkJsonpMethod.bind(this, 'GET');
 var methodIsPOST = checkJsonpMethod.bind(this, 'POST');
 var methodIsPUT = checkJsonpMethod.bind(this, 'PUT');
 var methodIsXXX = checkJsonpMethod.bind(this, 'XXX');
-var authCheckNone = checkJsonpAuth.bind(this, 'undefined', 'undefined');
-var authCheck1 = checkJsonpAuth.bind(this, 'username1', 'password1');
-var authCheck2 = checkJsonpAuth.bind(this, 'username2', 'password2');
+var authCheckNone =
+  checkJsonpAuth.bind(this, 'undefined', 'undefined', 'undefined');
+var authCheck1 = checkJsonpAuth.bind(this, 'username1', 'password1', 'cookie1');
+var authCheck2 = checkJsonpAuth.bind(this, 'username2', 'password2', 'cookie2');
 
 function executeTests(test, test_targets) {
   test.step(function() {
       var login1 =
-        test_login(test, 'http://127.0.0.1:8000', 'username1', 'password1');
+        test_login(test, 'http://127.0.0.1:8000',
+                   'username1', 'password1', 'cookie1');
       var login2 =
-        test_login(test, 'http://localhost:8000', 'username2', 'password2');
+        test_login(test, 'http://localhost:8000',
+                   'username2', 'password2', 'cookie2');
       var workerScript = 'resources/fetch-access-control-worker.js';
       var worker = undefined;
       var frameWindow = {};
       var counter = 0;
       window.addEventListener('message', test.step_func(onMessage), false);
 
       Promise.all([login1, login2])
         .then(function() {
             return service_worker_unregister_and_register(test,
                                                           workerScript,
@@ skipping 74 matching lines @@
             worker.postMessage({msg: 'START TEST CASE'});
           }))
           .then(test.step_func(function() {
               frameWindow.postMessage(
                 {url: TEST_TARGETS[counter][0]},
                 IFRAME_ORIGIN);
             }));
       }
     });
 }