Font Settings API: UI overhaul of example extension.

chrome/common/extensions/docs/examples/api/fontSettings/js/cr/ui/list_selection_controller.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.
 
 cr.define('cr.ui', function() {
   /**
    * Creates a selection controller that is to be used with lists. This is
    * implemented for vertical lists but changing the behavior for horizontal
    * lists or icon views is a matter of overriding {@code getIndexBefore},
    * {@code getIndexAfter}, {@code getIndexAbove} as well as
@@ skipping 267 matching lines @@
         if (prevent)
           e.preventDefault();
       }
     }
   };
 
   return {
     ListSelectionController: ListSelectionController
   };
 });