Make earcon ids strings instead of numbers.

chrome/browser/resources/chromeos/chromevox/common/nav_math_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 subclass of the navigation description container
  * specialising on math objects.
  *
  */
 
 
 goog.provide('cvox.NavMathDescription');
 
 goog.require('cvox.NavDescription');
 
 
 /**
  * Class specialising navigation descriptions for mathematics.
  * @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),
  *          domain: (undefined|string),
  *          style: (undefined|string)}} kwargs The arguments for
  * the specialised math navigationdescription. See arguments of nav
  * description plus the following:
  * domain Domain for translation.
  * style Style for translation.
  * @constructor
  * @extends {cvox.NavDescription}
  */
 cvox.NavMathDescription = function(kwargs) {
   goog.base(this, kwargs);
 
   var newPersonality = this.personality ? this.personality : {};
   var mathDescr = new Object();
 
   mathDescr['domain'] = kwargs.domain ? kwargs.domain : '';
   // TODO (sorge) Collate and document styles in an enum structure.
   mathDescr['style'] = kwargs.style ? kwargs.style : '';
   newPersonality['math'] = mathDescr;
   this.personality = newPersonality;
 };
 goog.inherits(cvox.NavMathDescription, cvox.NavDescription);