[ChromeOS] Hide 'signin-right' panel when it's empty.

chrome/browser/resources/chromeos/login/screen_gaia_signin.js

 // Copyright (c) 2011 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.
  */
 
 cr.define('login', function() {
 
@@ skipping 40 matching lines @@
     },
 
     /**
      * Shows/hides loading UI.
      * @param {boolean} show True to show loading UI.
      * @private
      */
     showLoadingUI_: function(show) {
       $('gaia-loading').hidden = !show;
       $('signin-frame').hidden = show;
-      $('signin-right').hidden = show;
+
+      // Sign-in right panel is hidden if all its items are hidden.
+      $('signin-right').hidden = show ||
+          ($('createAccount').hidden && $('guestSignin').hidden);

[achuithb, 2011/08/29 20:09:54]

Tricky.

     },
 
     /**
      * Whether Gaia is loading.
      * @type {boolean}
      */
     get loading() {
       return !$('gaia-loading').hidden;
     },
     set loading(loading) {
@@ skipping 58 matching lines @@
       // Reload and show the sign-in UI if needed.
       if (takeFocus)
         Oobe.showSigninUI();
     }
   };
 
   return {
     GaiaSigninScreen: GaiaSigninScreen
   };
 });