[AudioPlayer] Regenerate play order when is is insufficient

chrome/browser/resources/file_manager/audio_player/js/audio_player.js

 // Copyright (c) 2012 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 {HTMLElement} container Container element.
  * @constructor
  */
@@ skipping 103 matching lines @@
         return;
 
       this.trackListItems_.splice(0);
 
       for (var i = 0; i != this.entries_.length; i++) {
         var entry = this.entries_[i];
         var onClick = this.select_.bind(this, i, false /* no restore */);
         this.trackListItems_.push(new AudioPlayer.TrackInfo(entry, onClick));
       }
 
+      // Makes it sure that the handler of the track list is called, before the
+      // handler of the track index.
+      Platform.performMicrotaskCheckpoint();
+
       this.select_(position, !!time);
 
       // Load the selected track metadata first, then load the rest.
       this.loadMetadata_(position);
       for (i = 0; i != this.entries_.length; i++) {
         if (i != position)
           this.loadMetadata_(i);
       }
     }.bind(this));
   }.bind(this));
@@ skipping 266 matching lines @@
   this.title = (metadata.media && metadata.media.title) ||
       this.getDefaultTitle();
   this.artist = error ||
       (metadata.media && metadata.media.artist) || this.getDefaultArtist();
 };
 
 // Starts loading the audio player.
 window.addEventListener('WebComponentsReady', function(e) {
   AudioPlayer.load();
 });