cros: Fix "close" button visible during sign-in

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.
  */
 
 login.createScreen('GaiaSigninScreen', 'gaia-signin', function() {
   // GAIA animation guard timer. Started when GAIA page is loaded
@@ skipping 138 matching lines @@
         !this.loading &&
         !this.isSAML();
 
       this.navigation_.refreshVisible =
         !this.closable && this.isAtTheBeginning() &&
         this.screenMode_ != ScreenMode.SAML_INTERSTITIAL;
 
       this.navigation_.closeVisible =
         !this.navigation_.refreshVisible &&
         !isWhitelistError &&
-        !this.authCompleted &&
+        !this.authCompleted_ &&
         this.screenMode_ != ScreenMode.SAML_INTERSTITIAL;
 
       $('login-header-bar').updateUI_();
     },
 
     /**
      * SAML password confirmation attempt count.
      * @type {number}
      */
     samlPasswordConfirmAttempt_: 0,
@@ skipping 960 matching lines @@
       if (this.screenMode_ != ScreenMode.AD_AUTH)
         return;
       var adAuthUI = this.getSigninFrame_();
       adAuthUI.setUser(username);
       adAuthUI.setInvalid(errorState);
       this.loading = false;
       Oobe.getInstance().headerHidden = false;
     }
   };
 });