Video Player: Close the session when the other device is selected to play

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 485 matching lines @@
 
 /**
  * Invokes when a menuitem in the cast menu is selected.
  * @param {Object} cast Selected element in the list of casts.
  */
 VideoPlayer.prototype.onCastSelected_ = function(cast) {
   // If the selected item is same as the current item, do nothing.
   if ((this.currentCast_ && this.currentCast_.label) === (cast && cast.label))
     return;
 
-  this.currentCast_ = cast || null;
-  this.updateCheckOnCastMenu_();
-  this.reloadCurrentVideo();
+  this.unloadVideo(false);
+
+  // Waits for unloading video.
+  this.loadQueue_.run(function(callback) {
+    this.currentCast_ = cast || null;
+    this.updateCheckOnCastMenu_();
+    this.reloadCurrentVideo();
+    callback();
+  }.wrap(this));
 };
 
 /**
  * Set the list of casts.
  * @param {Array.<Object>} casts List of casts.
  */
 VideoPlayer.prototype.setCastList = function(casts) {
   var videoPlayerElement = document.querySelector('#video-player');
   var menu = document.querySelector('#cast-menu');
   menu.innerHTML = '';
@@ skipping 118 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));