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

chrome/browser/resources/extensions/extension_command_list.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.
 
 // <include src="shortcut_util.js">
 
 cr.define('extensions', function() {
   'use strict';
 
   /**
@@ skipping 360 matching lines @@
            keybinding: ''});
     },
 
     /**
      * A handler for the setting the scope of the command.
      * @param {Event} event The mouse event to consider.
      * @private
      */
     handleSetCommandScope_: function(event) {
       var parsed = this.parseElementId_('setCommandScope', event.target.id);
-      var element = document.getElementById(
+      var element = $(
           'setCommandScope-' + parsed.extensionId + '-' + parsed.commandName);
       var scope = element.selectedIndex == 1 ?
           chrome.developerPrivate.CommandScope.GLOBAL :
           chrome.developerPrivate.CommandScope.CHROME;
       chrome.developerPrivate.updateExtensionCommand(
           {extensionId: parsed.extensionId,
            commandName: parsed.commandName,
            scope: scope});
     },
 
@@ skipping 24 matching lines @@
                                   namespace.length + 1 + kExtensionIdLength),
         commandName: id.substring(namespace.length + 1 + kExtensionIdLength + 1)
       };
     },
   };
 
   return {
     ExtensionCommandList: ExtensionCommandList
   };
 });