Added ability to use new GAIA endpoint on CrOS login screen.

chrome/browser/resources/chromeos/login/screen_gaia_signin.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.
 
 /**
  * @fileoverview Oobe signin screen implementation.
  */
 
 <include src="../../gaia_auth_host/gaia_auth_host.js"></include>
 
@@ skipping 238 matching lines @@
       var params = {};
       for (var i in cr.login.GaiaAuthHost.SUPPORTED_PARAMS) {
         var name = cr.login.GaiaAuthHost.SUPPORTED_PARAMS[i];
         if (data[name])
           params[name] = data[name];
       }
 
       if (data.localizedStrings)
         params.localizedStrings = data.localizedStrings;
 
+      if (data.useEmbedded)
+        params.gaiaPath = 'EmbeddedSignIn';
+
       if (data.forceReload ||
           JSON.stringify(this.gaiaAuthParams_) != JSON.stringify(params)) {
         this.error_ = 0;
-        this.gaiaAuthHost_.load(data.useOffline ?
-                                    cr.login.GaiaAuthHost.AuthMode.OFFLINE :
-                                    cr.login.GaiaAuthHost.AuthMode.DEFAULT,
+
+        var authMode = cr.login.GaiaAuthHost.AuthMode.DEFAULT;
+        if (data.useOffline)
+          authMode = cr.login.GaiaAuthHost.AuthMode.OFFLINE;
+        else if (data.useEmbedded)
+          authMode = cr.login.GaiaAuthHost.AuthMode.DESKTOP;
+
+        this.gaiaAuthHost_.load(authMode,
                                 params,
                                 this.onAuthCompleted_.bind(this));
         this.gaiaAuthParams_ = params;
 
         this.loading = true;
         this.startLoadingTimer_();
       } else if (this.loading && this.error_) {
         // An error has occurred, so trying to reload.
         this.doReload();
       }
@@ skipping 345 matching lines @@
      * For more info see C++ class 'WebUILoginView' which calls this method.
      * @param {number} error Error code.
      * @param {string} url The URL that failed to load.
      */
     onFrameError: function(error, url) {
       this.error_ = error;
       chrome.send('frameLoadingCompleted', [this.error_]);
     },
   };
 });