Added chrome switch that lets tests override URL path, moved GAIA auth extension from CrOS

chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment.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.
 
 cr.define('oobe', function() {
   /**
    * Creates a new oobe screen div.
    * @constructor
    * @extends {HTMLDivElement}
    */
@@ skipping 166 matching lines @@
         links[i].hidden = !this.isAutoEnrollment_;
     },
 
     /**
      * Event handler that is invoked just before the frame is shown.
      * @param data {dictionary} Screen init payload, contains the signin frame
      * URL.
      */
     onBeforeShow: function(data) {
       var url = data.signin_url;
-      if (data.gaiaOrigin)
-        url += '?gaiaOrigin=' + encodeURIComponent(data.gaiaOrigin);
+      url += '?gaiaOrigin=' + encodeURIComponent(data.gaiaOrigin);
+      if (data.gaiaUrlBase)
+        url += '&gaiaUrlPath=' + encodeURIComponent(data.gaiaUrlPath);
       if (data.test_email) {
         url += '&test_email=' + encodeURIComponent(data.test_email);
         url += '&test_password=' + encodeURIComponent(data.test_password);
       }
       this.signInUrl_ = url;
       this.setIsAutoEnrollment(data.is_auto_enrollment);
 
       $('oauth-enroll-signin-frame').contentWindow.location.href =
           this.signInUrl_;
 
@@ skipping 104 matching lines @@
       var msg = m.data;
       if (msg.method == 'completeLogin' && this.isSigninMessage_(m))
         chrome.send('oauthEnrollCompleteLogin', [ msg.email, msg.password ]);
     }
   };
 
   return {
     OAuthEnrollmentScreen: OAuthEnrollmentScreen
   };
 });