GTTF: convert some tests in chrome to use EmbeddedTestServer patch nr 1

chrome/test/data/extensions/platform_apps/isolation/test.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 chrome.test.getConfig(function(config) {
   chrome.test.runTests([
     function testCookieNotSet() {
       var xhr = new XMLHttpRequest();
       xhr.open(
           'GET',
           'http://localhost:' + config.testServer.port + '/echoheader?Cookie',
           true);
       xhr.onload = function() {
-        // Cookies should not have been passed in the request, so the echo of
-        // their header should be the Pythonic "None".
-        chrome.test.assertEq('None', xhr.responseText);
+        // Cookies should not have been passed in the request.
+        chrome.test.assertEq('', xhr.responseText);
         chrome.test.succeed();
       };
       xhr.onerror = function() {
         chrome.test.fail('Unexpected HTTP status ' + xhr.status);
       }
       xhr.send();
     }
   ]);
 });