Add browser test for new user CrOS login flow

chrome/browser/resources/gaia_auth/test/content.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.
 
 console.log('Test script injected!');
 
 function getQueryParam(key, defaultVal) {
   if (!defaultVal) defaultVal = '';
   key = key.replace(/[\[]/, '\\\[').replace(/[\]]/, '\\\]');
   var regex = new RegExp('[\\?&]' + key + '=([^&#]*)');
   var qs = regex.exec(window.location.href);
   if (qs == null)
     return defaultVal;
   else
     return qs[1];
 }
 
+console.log(document.URL);
 if (document.URL.match(/https\:\/\/www\.google\.com\/accounts\/ServiceLogin/) ||
     document.URL.match(/https\:\/\/accounts\.google\.com\/ServiceLogin/) ||
     document.URL.match(
         /https\:\/\/gaiastaging\.corp\.google\.com\/ServiceLogin/) ||
-    document.URL.match(/https\:\/\/insecure\.com\/accounts\/ServiceLogin/)) {
+    document.URL.match(/https\:\/\/insecure\.com\/accounts\/ServiceLogin/) ||
+  document.URL.match(/http\:\/\/localhost(:[0-9]*)?\/ServiceLogin/)) {
   var testEmail = unescape(getQueryParam('test_email'));
   var testPassword = unescape(getQueryParam('test_pwd'));
+  var testContinue = unescape(getQueryParam('continue'));
   console.log('Got test account info: ' + testEmail + '/' + testPassword);
   document.getElementById('Email').value = testEmail;
   document.getElementById('Passwd').value = testPassword;
+  document.getElementById('continue').value = testContinue;
   console.log('Form field changed!');
   if (testEmail != '') {
     document.getElementById('signIn').click();
     console.log('Form submitted!');
   }
 }