WebUI: Fix/suppress some existing violations of no-restricted-globals.

chrome/browser/resources/chromeos/switch_access/options.js

 // Copyright 2017 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.
 
 /**
  * Alias for document.getElementById.
  *
  * @param  {string} id
  * @return {Element}
  */
 let $ = function(id) {
+  // eslint-disable-next-line no-restricted-properties
   return document.getElementById(id);
 };
 
 /**
  * Class to manage the options page.
  *
  * @constructor
  */
 function SwitchAccessOptions() {
   let background = chrome.extension.getBackgroundPage();
@@ skipping 81 matching lines @@
           $(key).value = updatedPrefs[key] / 1000;
           break;
       }
     }
   }
 };
 
 document.addEventListener('DOMContentLoaded', function() {
   new SwitchAccessOptions();
 });