Revert "Revert of Revert of Revert of ChromeOS NetworkScreenHandler should not call CheckAndResolve…

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

 // Copyright (c) 2013 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 Terms of Service screen implementation.
  */
 
 login.createScreen('TermsOfServiceScreen', 'terms-of-service',
   function() { return {
@@ skipping 59 matching lines @@
         $('tos-accept-button').disabled = true;
         chrome.send('termsOfServiceBack');
       });
       backButton.addEventListener('blur', function(event) {
         this.blurred = true;
       });
       buttons.push(backButton);
 
       var acceptButton = this.ownerDocument.createElement('button');
       acceptButton.id = 'tos-accept-button';
-      acceptButton.disabled = true;
+      acceptButton.disabled = this.classList.contains('tos-loading');
       acceptButton.classList.add('preserve-disabled-state');
       acceptButton.textContent =
           loadTimeData.getString('termsOfServiceAcceptButton');
       acceptButton.addEventListener('click', function(event) {
         $('tos-back-button').disabled = true;
         $('tos-accept-button').disabled = true;
         chrome.send('termsOfServiceAccept');
       });
       buttons.push(acceptButton);
 
@@ skipping 11 matching lines @@
     /**
      * Event handler that is invoked just before the screen is shown.
      * @param {object} data Screen init payload.
      */
     onBeforeShow: function(data) {
       Oobe.getInstance().headerHidden = true;
     }
   };
 });