Make earcon ids strings instead of numbers.

chrome/browser/resources/chromeos/chromevox/chromevox/injected/navigation_manager.js

Index: chrome/browser/resources/chromeos/chromevox/chromevox/injected/navigation_manager.js
diff --git a/chrome/browser/resources/chromeos/chromevox/chromevox/injected/navigation_manager.js b/chrome/browser/resources/chromeos/chromevox/chromevox/injected/navigation_manager.js
index 6dc66039f69254c3e4d1481792f1be972effd29e..00b37281b1ee58274dc15aaf9ac3923d1d78bf89 100644
--- a/chrome/browser/resources/chromeos/chromevox/chromevox/injected/navigation_manager.js
+++ b/chrome/browser/resources/chromeos/chromevox/chromevox/injected/navigation_manager.js
@@ -111,7 +111,7 @@ cvox.NavigationManager.prototype.reset = function() {
    * @private
    */
   this.curSel_ = document.activeElement != document.body ?
-      /** @type {!cvox.CursorSelection} **/
+      /** @type {!cvox.CursorSelection} */
       (cvox.CursorSelection.fromNode(document.activeElement)) :
       this.shifter_.begin(this.curSel_, {reversed: false});
 
@@ -449,23 +449,23 @@ cvox.NavigationManager.prototype.getDescription = function() {
 
   // Earcons.
   if (this.skipped_) {
-    earcons.push(cvox.AbstractEarcons.PARAGRAPH_BREAK);
+    earcons.push(cvox.Earcon.PARAGRAPH_BREAK);
     this.skipped_ = false;
   }
   if (this.recovered_) {
-    earcons.push(cvox.AbstractEarcons.FONT_CHANGE);
+    earcons.push(cvox.Earcon.FONT_CHANGE);
     this.recovered_ = false;
   }
   if (this.pageEnd_) {
-    earcons.push(cvox.AbstractEarcons.WRAP);
+    earcons.push(cvox.Earcon.WRAP);
     this.pageEnd_ = false;
   }
   if (this.enteredShifter_) {
-    earcons.push(cvox.AbstractEarcons.OBJECT_ENTER);
+    earcons.push(cvox.Earcon.OBJECT_ENTER);
     this.enteredShifter_ = false;
   }
   if (this.exitedShifter_) {
-    earcons.push(cvox.AbstractEarcons.OBJECT_EXIT);
+    earcons.push(cvox.Earcon.OBJECT_EXIT);
     this.exitedShifter_ = false;
   }
   if (earcons.length > 0 && desc.length > 0) {
@@ -701,7 +701,7 @@ cvox.NavigationManager.prototype.finishNavCommand = function(
   if (this.pageEnd_ && !this.pageEndAnnounced_) {
     this.pageEndAnnounced_ = true;
     cvox.ChromeVox.tts.stop();
-    cvox.ChromeVox.earcons.playEarcon(cvox.AbstractEarcons.WRAP);
+    cvox.ChromeVox.earcons.playEarcon(cvox.Earcon.WRAP);
     if (cvox.ChromeVox.verbosity === cvox.VERBOSITY_VERBOSE) {
       var msg = cvox.ChromeVox.msgs.getMsg('wrapped_to_top');
       if (this.isReversed()) {