Make earcon ids strings instead of numbers.

chrome/browser/resources/chromeos/chromevox/cvox2/background/output.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 Provides output services for ChromeVox.
  */
 
 goog.provide('Output');
 goog.provide('Output.EventType');
@@ skipping 508 matching lines @@
   Output.Action.call(this);
   /** @type {string} */
   this.earconId = earconId;
 };
 
 Output.EarconAction.prototype = {
   __proto__: Output.Action.prototype,
 
   /** @override */
   run: function() {
-    cvox.ChromeVox.earcons.playEarcon(cvox.AbstractEarcons[this.earconId]);
+    cvox.ChromeVox.earcons.playEarcon(cvox.Earcon[this.earconId]);
   }
 };
 
 /**
  * Annotation for selection.
  * @param {number} startIndex
  * @param {number} endIndex
  * @constructor
  */
 Output.SelectionSpan = function(startIndex, endIndex) {
@@ skipping 750 matching lines @@
             elem.end);
       });
       spansToRemove.forEach(result.removeSpan.bind(result));
       separator = Output.SPACE;
     });
     return result;
   }
 };
 
 });  // goog.scope