Revert "Fix closure compiler error which is caused by crrev.com/1165913003."

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}
  */
 ContentMetadataProvider.WORKER_SCRIPT = '/js/metadata_worker.js';
 
 /**
  * Gallery for viewing and editing image files.
  *
  * @param {!VolumeManagerWrapper} volumeManager
  * @constructor
  * @struct
  */
 function Gallery(volumeManager) {
   /**
-   * @type {{appWindow: chrome.app.window.AppWindow,
+   * @type {{appWindow: chrome.app.window.AppWindow, onClose: function(),
+   *     onMaximize: function(), onMinimize: function(),
    *     onAppRegionChanged: function(), readonlyDirName: string,
    *     displayStringFunction: function(), loadTimeData: Object,
    *     curDirEntry: Entry, searchResults: *}}
    * @private
    *
    * TODO(yawano): curDirEntry and searchResults seem not to be used.
    *     Investigate them and remove them if possible.
    */
   this.context_ = {
     appWindow: chrome.app.window.current(),
@@ skipping 861 matching lines @@
 initializePromise.then(reload);
 
 /**
  * Enteres the debug mode.
  */
 window.debugMe = function() {
   initializePromise.then(function() {
     gallery.debugMe();
   });
 };