Make earcon ids strings instead of numbers.

chrome/browser/resources/chromeos/chromevox/common/earcon_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 Earcon utils.
  */
 
 goog.provide('cvox.EarconUtil');
 
 goog.require('cvox.AbstractEarcons');
 goog.require('cvox.AriaUtil');
 goog.require('cvox.DomUtil');
 
 /**
  * Returns the id of an earcon to play along with the description for a node.
  *
  * @param {Node} node The node to get the earcon for.
- * @return {number?} The earcon id, or null if none applies.
+ * @return {cvox.Earcon?} The earcon id, or null if none applies.
  */
 cvox.EarconUtil.getEarcon = function(node) {
   var earcon = cvox.AriaUtil.getEarcon(node);
   if (earcon != null) {
     return earcon;
   }
 
   switch (node.tagName) {
     case 'BUTTON':
-      return cvox.AbstractEarcons.BUTTON;
+      return cvox.Earcon.BUTTON;
     case 'A':
       if (node.hasAttribute('href')) {
-        return cvox.AbstractEarcons.LINK;
+        return cvox.Earcon.LINK;
       }
       break;
     case 'IMG':
       if (cvox.DomUtil.hasLongDesc(node)) {
-        return cvox.AbstractEarcons.LONG_DESC;
+        return cvox.Earcon.LONG_DESC;
       }
       break;
     case 'LI':
-      return cvox.AbstractEarcons.LIST_ITEM;
+      return cvox.Earcon.LIST_ITEM;
     case 'SELECT':
-      return cvox.AbstractEarcons.LISTBOX;
+      return cvox.Earcon.LISTBOX;
     case 'TEXTAREA':
-      return cvox.AbstractEarcons.EDITABLE_TEXT;
+      return cvox.Earcon.EDITABLE_TEXT;
     case 'INPUT':
       switch (node.type) {
         case 'button':
         case 'submit':
         case 'reset':
-          return cvox.AbstractEarcons.BUTTON;
+          return cvox.Earcon.BUTTON;
         case 'checkbox':
         case 'radio':
           if (node.checked) {
-            return cvox.AbstractEarcons.CHECK_ON;
+            return cvox.Earcon.CHECK_ON;
           } else {
-            return cvox.AbstractEarcons.CHECK_OFF;
+            return cvox.Earcon.CHECK_OFF;
           }
         default:
           if (cvox.DomUtil.isInputTypeText(node)) {
             // 'text', 'password', etc.
-            return cvox.AbstractEarcons.EDITABLE_TEXT;
+            return cvox.Earcon.EDITABLE_TEXT;
           }
       }
   }
   return null;
 };