Revert "Speculative revert by sheriff"

chrome/browser/resources/extensions/extensions.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="../../../../ui/webui/resources/js/cr/ui/focus_row.js">
 <include src="../../../../ui/webui/resources/js/cr/ui/focus_grid.js">
 <include src="../uber/uber_utils.js">
 <include src="extension_code.js">
 <include src="extension_commands_overlay.js">
 <include src="extension_error_overlay.js">
@@ skipping 245 matching lines @@
           window.clearTimeout(this.loadingTimeout_);
         document.documentElement.classList.add('loading');
         this.loadingTimeout_ = window.setTimeout(function() {
           document.documentElement.classList.remove('loading');
         }, 0);
 
         /** @const */
         var hasExtensions = extensionList.getNumExtensions() != 0;
         $('no-extensions').hidden = hasExtensions;
         $('extension-list-wrapper').hidden = !hasExtensions;
+        $('extension-settings-list').updateFocusableElements();
       }.bind(this));
     },
 
     /**
      * Handles the Pack Extension button.
      * @param {Event} e Change event.
      * @private
      */
     handlePackExtension_: function(e) {
       ExtensionSettings.showOverlay($('pack-extension-overlay'));
@@ skipping 166 matching lines @@
   // Export
   return {
     ExtensionSettings: ExtensionSettings
   };
 });
 
 window.addEventListener('load', function(e) {
   document.documentElement.classList.add('loading');
   extensions.ExtensionSettings.getInstance().initialize();
 });