Rename some earcons based on actual usage

chrome/browser/resources/chromeos/chromevox/common/aria_util.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.
 
 /**
  * @fileoverview A collection of JavaScript utilities used to simplify working
  * with ARIA (http://www.w3.org/TR/wai-aria).
  */
 
 
@@ skipping 913 matching lines @@
         return cvox.Earcon.CHECK_ON;
       } else {
         return cvox.Earcon.CHECK_OFF;
       }
     case 'combobox':
     case 'listbox':
       return cvox.Earcon.LISTBOX;
     case 'textbox':
       return cvox.Earcon.EDITABLE_TEXT;
     case 'listitem':
-      return cvox.Earcon.BULLET;
+      return cvox.Earcon.LIST_ITEM;
     case 'link':
       return cvox.Earcon.LINK;
   }
 
   return null;
 };
 
 
 /**
  * Returns the role of the node.
@@ skipping 24 matching lines @@
  * @param {Node} node The node to be checked.
  * @return {boolean} Whether or not the node is an ARIA math node.
  */
 cvox.AriaUtil.isMath = function(node) {
   if (!node || !node.getAttribute) {
     return false;
   }
   var role = cvox.AriaUtil.getRoleAttribute(node);
   return role == 'math';
 };