Actual fix for braille translation initialization race.

chrome/browser/resources/chromeos/chromevox/braille/braille_translator_manager.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 Keeps track of the current braille translators.
  */
 
 goog.provide('cvox.BrailleTranslatorManager');
 
@@ skipping 44 matching lines @@
    * @private
    */
   this.uncontractedTranslator_ = null;
   /**
    * @type {string?}
    * @private
    */
   this.uncontractedTableId_ = null;
 
   this.fetchTables_();
-  this.loadLiblouis_(0);
+  document.addEventListener('DOMContentLoaded', this.loadLiblouis_.bind(this),
+                            false);
 };
 
 cvox.BrailleTranslatorManager.prototype = {
   /**
    * Adds a listener to be called whenever there is a change in the
    * translator(s) returned by other methods of this instance.
    * @param {function()} listener The listener.
    */
   addChangeListener: function(listener) {
     this.changeListeners_.push(listener);
@@ skipping 120 matching lines @@
    */
   fetchTables_: function() {
     cvox.BrailleTable.getAll(function(tables) {
       this.tables_ = tables;
       this.refresh();
     }.bind(this));
   },
 
   /**
    * Loads the liblouis instance by attaching it to the document.
-   * Retries a few times if the document doesn't yet have a body.
-   * @param {number} tries Number of attempts made so far.
    * @private
    */
-  loadLiblouis_: function(tries) {
-    if (!document.body) {
-      if (tries <= 5) {
-        window.setTimeout(this.loadLiblouis_.bind(this, tries + 1), 500);
-      } else {
-        console.error(
-            'Timeout waiting for document.body; not initializing braille.');
-      }
-      return;
-    }
-
-    this.liblouis_.attachToElement(document.body);
+  loadLiblouis_: function() {
+    // Cast away nullability.  When the document is loaded, it will always
+    // have a body.
+    this.liblouis_.attachToElement(
+        /** @type {!HTMLBodyElement} */ (document.body));
   },
 
   /**
    * @return {!cvox.LibLouis} The liblouis instance used by this object.
    */
   getLibLouisForTest: function() {
     return this.liblouis_;
   },
 
   /**
    * @return {!Array.<cvox.BrailleTable.Table>} The currently loaded braille
    *     tables, or an empty array if they are not yet loaded.
    */
   getTablesForTest: function() {
     return this.tables_;
   }
 };