Files.app: Extract cache part from NewMetadataProvider.

ui/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.
 
 /**
  * Overrided metadata worker's path.
  * @type {string}
  * @const
  */
 ContentMetadataProvider.WORKER_SCRIPT = '/js/metadata_worker.js';
 
 /**
  * @param {HTMLElement} container Container element.
  * @constructor
  */
 function AudioPlayer(container) {
   this.container_ = container;
   this.volumeManager_ = new VolumeManagerWrapper(
       VolumeManagerWrapper.DriveEnabledStatus.DRIVE_ENABLED);
-  this.fileSystemMetadata_ = FileSystemMetadata.create(
-      new MetadataProviderCache(), this.volumeManager_);
+  this.fileSystemMetadata_ = new FileSystemMetadata(this.volumeManager_);
   this.selectedEntry_ = null;
 
   this.model_ = new AudioPlayerModel();
   var observer = new PathObserver(this.model_, 'expanded');
   observer.open(function(newValue, oldValue) {
     // Inverse arguments intentionally to match the Polymer way.
     this.onModelExpandedChanged(oldValue, newValue);
   }.bind(this));
 
   this.entries_ = [];
@@ skipping 393 matching lines @@
   // TODO(yoshiki): Handle error in better way.
   // TODO(yoshiki): implement artwork (metadata.thumbnail)
   this.title = metadata.mediaTitle || this.getDefaultTitle();
   this.artist = error || metadata.mediaArtist || this.getDefaultArtist();
 };
 
 // Starts loading the audio player.
 window.addEventListener('polymer-ready', function(e) {
   AudioPlayer.load();
 });