Use an enum for ChromeVox queue mode.

chrome/browser/resources/chromeos/chromevox/testing/tester.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.
 
 goog.provide('cvox.ChromeVoxTester');
 
 goog.require('cvox.AbstractBraille');
 goog.require('cvox.AbstractEarcons');
 goog.require('cvox.ChromeVoxEventWatcher');
 goog.require('cvox.ChromeVoxUserCommands');
@@ skipping 30 matching lines @@
 
   cvox.ChromeVox.braille = new cvox.AbstractBraille();
   cvox.ChromeVox.braille.write = function(params) {};
 
   cvox.ChromeVox.msgs = new cvox.TestMsgs();
 
   cvox.ChromeVox.host = new cvox.TestHost();
 
   // Init LiveRegions with a date of 0 so that the initial delay before
   // things is spoken is skipped.
-  cvox.LiveRegions.init(new Date(0), cvox.AbstractTts.QUEUE_MODE_QUEUE, false);
+  cvox.LiveRegions.init(new Date(0), cvox.QueueMode.QUEUE, false);
 
   cvox.ChromeVoxEventWatcher.init(doc);
   window.console.log('done setup');
 };
 
 /**
  * Tears down cvox.ChromeVoxTester.
  * @param {!Document} doc The DOM document where event listeners were added.
  */
 cvox.ChromeVoxTester.tearDown = function(doc) {
@@ skipping 46 matching lines @@
   cvox.ChromeVox.navigationManager.ensureNotSubnavigating();
   cvox.ChromeVox.navigationManager.setGranularity(
          cvox.ChromeVoxTester.STRATEGY_MAP[strategy]);
 };
 
 /**
  * Starts reading the page from the current node.
  */
 cvox.ChromeVoxTester.readFromHere = function() {
   cvox.ChromeVox.navigationManager.startReading(
-         cvox.AbstractTts.QUEUE_MODE_FLUSH);
+         cvox.QueueMode.FLUSH);
 };
 
 /**
  * Syncs to the given node in the test HTML
  * @param {Node} node The node to sync to.
  */
 cvox.ChromeVoxTester.syncToNode = function(node) {
   cvox.ChromeVox.navigationManager
       .updateSel(cvox.CursorSelection.fromNode(node));
   cvox.ChromeVox.navigationManager.sync();
 };
 
 /**
  * Syncs to the first node in the test.
  */
 cvox.ChromeVoxTester.syncToFirstNode = function() {
   cvox.ChromeVox.navigationManager.updateSel(cvox.CursorSelection.fromBody());
   cvox.ChromeVox.navigationManager.sync();
 };