Add browser test for new user CrOS login flow

chrome/browser/resources/gaia_auth/test/content.js

Index: chrome/browser/resources/gaia_auth/test/content.js
diff --git a/chrome/browser/resources/gaia_auth/test/content.js b/chrome/browser/resources/gaia_auth/test/content.js
index 459a5b059506edf2289e39c06f5ff3bda3d4cd13..1bf055f03e2163c024c6283cf39273c51e664888 100644
--- a/chrome/browser/resources/gaia_auth/test/content.js
+++ b/chrome/browser/resources/gaia_auth/test/content.js
@@ -15,16 +15,20 @@ function getQueryParam(key, defaultVal) {
     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();