Move the supervised user error page to a component

components/supervised_user_error_page/resources/supervised_user_block_interstitial.js

 // Copyright 2014 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.
 
 function sendCommand(cmd) {
   window.domAutomationController.setAutomationId(1);
   window.domAutomationController.send(cmd);
 }
 
 function makeImageSet(url1x, url2x) {
@@ skipping 78 matching lines @@
     $('details').hidden = true;
     $('back-button').hidden = false;
     $('request-access-button').hidden = true;
   } else {
     $('request-failed-message').hidden = false;
     $('request-access-button').hidden = false;
   }
 }
 
 document.addEventListener('DOMContentLoaded', initialize);