Random clean up around Chrome OS file manager code.

ui/file_manager/video_player/js/video_player.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.
 
 'use strict';
 
 /**
  * @param {Element} playerContainer Main container.
  * @param {Element} videoContainer Container for the video element.
  * @param {Element} controlsContainer Container for video controls.
@@ skipping 478 matching lines @@
 
 /**
  * Set the list of casts.
  * @param {Array.<Object>} casts List of casts.
  */
 VideoPlayer.prototype.setCastList = function(casts) {
   var button = document.querySelector('.cast-button');
   var menu = document.querySelector('#cast-menu');
   menu.innerHTML = '';
 
-  // TODO(yoshiki): Handle the case that the current cast disapears.
+  // TODO(yoshiki): Handle the case that the current cast disappears.
 
   if (casts.length === 0) {
     button.classList.add('hidden');
     if (this.currentCast_)
       this.onCurrentCastDisappear_();
     return;
   }
 
   if (this.currentCast_) {
     var currentCastAvailable = casts.some(function(cast) {
@@ skipping 67 matching lines @@
 var initPromise = Promise.all(
     [new Promise(initVideos.wrap(null)),
      new Promise(initStrings.wrap(null)),
      new Promise(util.addPageLoadHandler.wrap(null))]);
 
 initPromise.then(function(results) {
   var videos = results[0];
   player.prepare(videos);
   return new Promise(player.playFirstVideo.wrap(player));
 }.wrap(null));