Make earcon ids strings instead of numbers.

chrome/browser/resources/chromeos/chromevox/common/nav_description.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 simple container object for the description of a
  * navigation from one object to another.
  *
  */
 
 
 goog.provide('cvox.NavDescription');
 
 goog.require('cvox.AbstractTts');
 goog.require('cvox.ChromeVox');
 goog.require('cvox.CursorSelection');
 goog.require('cvox.QueueMode');
 
 /**
  * A class representing the description of navigation from one object to
  * another.
  * @param {{context: (undefined|string),
  *          text: (string),
  *          userValue: (undefined|string),
  *          annotation: (undefined|string),
- *          earcons: (undefined|Array<number>),
+ *          earcons: (undefined|Array<cvox.Earcon>),
  *          personality: (undefined|Object),
  *          hint: (undefined|string),
             category: (undefined|string)}} kwargs The arguments for this
  *  description.
  *  context The context, for example descriptions of objects
  *     that were crossed into, like "Toolbar" or "Menu Bar" or "List with
  *     5 items". This is all spoken with an annotation voice.
  *  text The text of the object itself, including text from
  *     titles, labels, etc.
  *  userValue The text that the user has entered.
@@ skipping 37 matching lines @@
          ' text="' + this.text + '" ' +
          ' userValue="' + this.userValue + '" ' +
          ' annotation="' + this.annotation +
          (this.category ? '" category="' + this.category + '")' : '') +
          '")';
 };
 
 
 /**
  * Modifies the earcon to play along with the spoken description of the object.
- * @param {number} earconId An earcon id to be pushed on to the list of earcon
- * ids to play along with the spoken description of this object.
+ * @param {cvox.Earcon} earconId An earcon id to be pushed on to the list of
+ * earcon ids to play along with the spoken description of this object.
  */
 cvox.NavDescription.prototype.pushEarcon = function(earconId) {
   this.earcons.push(earconId);
 };
 
 
 /**
  * Speak this nav description with the given queue mode.
  * @param {cvox.QueueMode=} queueMode The queue mode.
  * @param {function()=} opt_startCallback Function called when this
@@ skipping 58 matching lines @@
  * Compares two NavDescriptions.
  * @param {cvox.NavDescription} that A NavDescription.
  * @return {boolean} True if equal.
  */
 cvox.NavDescription.prototype.equals = function(that) {
   return this.context == that.context &&
       this.text == that.text &&
       this.userValue == that.userValue &&
       this.annotation == that.annotation;
 };