Use an enum for ChromeVox queue mode.

chrome/browser/resources/chromeos/chromevox/extensions/searchvox/search.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 Uses ChromeVox API to enhance the search experience.
  */
 
 goog.provide('cvox.Search');
@@ skipping 84 matching lines @@
   cvox.Search.isPane = false;
 };
 
 /**
  * Sync the search result index to ChromeVox.
  */
 cvox.Search.syncToIndex = function() {
   cvox.ChromeVox.tts.stop();
   var prop = { endCallback: cvox.Search.speakSync_ };
   if (cvox.Search.index === 0) {
-    cvox.ChromeVox.tts.speak('First result', 1, prop);
+    cvox.ChromeVox.tts.speak('First result', cvox.QueueMode.QUEUE, prop);
   } else if (cvox.Search.index === cvox.Search.results.length - 1) {
-    cvox.ChromeVox.tts.speak('Last result', 1, prop);
+    cvox.ChromeVox.tts.speak('Last result', cvox.QueueMode.QUEUE, prop);
   } else {
     cvox.Search.speakSync_();
   }
 };
 
 /**
  * Sync the current pane index to ChromeVox.
  */
 cvox.Search.syncPaneToIndex = function() {
   var pane = cvox.Search.panes[cvox.Search.paneIndex];
@@ skipping 48 matching lines @@
   var navEnds = document.getElementsByClassName(NAV_END_CLASS);
   var navEnd = next ? navEnds[1] : navEnds[0];
   var url = cvox.SearchUtil.extractURL(navEnd);
   var navToUrl = function() {
     window.location = url;
   };
   var prop = { endCallback: navToUrl };
   if (url) {
     var pageNumber = cvox.Search.getPageNumber(url);
     if (!isNaN(pageNumber)) {
-      cvox.ChromeVox.tts.speak('Page ' + pageNumber, 0, prop);
+      cvox.ChromeVox.tts.speak('Page ' + pageNumber, cvox.QueueMode.FLUSH,
+                               prop);
     } else {
-      cvox.ChromeVox.tts.speak('Unknown page.', 0, prop);
+      cvox.ChromeVox.tts.speak('Unknown page.', cvox.QueueMode.FLUSH, prop);
     }
   }
 };
 
 /**
  * Navigates to the currently synced pane.
  */
 cvox.Search.goToPane = function() {
   var pane = cvox.Search.panes[cvox.Search.paneIndex];
   if (pane.className === cvox.Search.SELECTED_PANE_CLASS) {
-    cvox.ChromeVox.tts.speak('You are already on that page.');
+    cvox.ChromeVox.tts.speak('You are already on that page.',
+                             cvox.QueueMode.QUEUE);
     return;
   }
   var anchor = pane.querySelector('a');
-  cvox.ChromeVox.tts.speak(anchor.textContent);
+  cvox.ChromeVox.tts.speak(anchor.textContent, cvox.QueueMode.QUEUE);
   var url = cvox.SearchUtil.extractURL(pane);
   if (url) {
     window.location = url;
   }
 };
 
 /**
  * Follow the link to the current result.
  */
 cvox.Search.goToResult = function() {
@@ skipping 226 matching lines @@
     return;
   }
 
   cvox.Search.populateResults();
   cvox.Search.populatePanes();
   cvox.Search.paneIndex = cvox.Search.getSelectedPaneIndex();
 
   cvox.Search.initialSync();
 
 };