Files.app: Extract cache part from NewMetadataProvider.

ui/file_manager/gallery/js/gallery.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.
 
 /**
  * Overrided metadata worker's path.
  * @type {string}
  */
 ContentProvider.WORKER_SCRIPT = '/js/metadata_worker.js';
 ContentMetadataProvider.WORKER_SCRIPT = '/js/metadata_worker.js';
@@ skipping 38 matching lines @@
     searchResults: null
   };
   this.container_ = queryRequiredElement(document, '.gallery');
   this.document_ = document;
   this.metadataCache_ = this.context_.metadataCache;
   this.volumeManager_ = volumeManager;
   /**
    * @private {!FileSystemMetadata}
    * @const
    */
-  this.fileSystemMetadata_ = FileSystemMetadata.create(
-      new MetadataProviderCache(), volumeManager);
+  this.fileSystemMetadata_ = new FileSystemMetadata(volumeManager);
   this.selectedEntry_ = null;
   this.metadataCacheObserverId_ = null;
   this.onExternallyUnmountedBound_ = this.onExternallyUnmounted_.bind(this);
   this.initialized_ = false;
 
   this.dataModel_ = new GalleryDataModel(
       this.context_.metadataCache,
       this.fileSystemMetadata_);
   var downloadVolumeInfo = this.volumeManager_.getCurrentProfileVolumeInfo(
       VolumeManagerCommon.VolumeType.DOWNLOADS);
@@ skipping 908 matching lines @@
 initializePromise.then(reload);
 
 /**
  * Enteres the debug mode.
  */
 window.debugMe = function() {
   initializePromise.then(function() {
     gallery.debugMe();
   });
 };