[AudioPlayer] Don't start a playback automatically when reopening

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 169 matching lines @@
   if (this.player_)
     this.player_.onPageUnload();
 
   if (this.volumeManager_)
     this.volumeManager_.dispose();
 };
 
 /**
  * Selects a new track to play.
  * @param {number} newTrack New track number.
- * @param {boolean=} opt_restoreState True if restoring the play state from URL.
  * @private
  */
-AudioPlayer.prototype.select_ = function(newTrack, opt_restoreState) {
+AudioPlayer.prototype.select_ = function(newTrack) {
   if (this.currentTrackIndex_ == newTrack) return;
 
   this.currentTrackIndex_ = newTrack;
   this.player_.currentTrackIndex = this.currentTrackIndex_;
+  Platform.performMicrotaskCheckpoint();
+
+  if (!window.appReopen)
+    this.player_.audioElement.play();
 
   window.appState.position = this.currentTrackIndex_;
   window.appState.time = 0;
   util.saveAppState();
 
   var entry = this.entries_[this.currentTrackIndex_];
 
   this.fetchMetadata_(entry, function(metadata) {
     if (this.currentTrackIndex_ != newTrack)
       return;
@@ skipping 197 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();
 });