(WIP) Use generator to generate externs for chrome.fileManagerPrivate API.

ui/file_manager/gallery/js/slide_mode.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.
 
 /**
  * Slide mode displays a single image and has a set of controls to navigate
  * between the images and to edit an image.
  *
  * @param {!HTMLElement} container Main container element.
  * @param {!HTMLElement} content Content container element.
@@ skipping 1731 matching lines @@
     this.progressBarTimer_ = 0;
   }
 
   this.loadingItemUrl_ = undefined;
 
   this.progressBar_.hidden = true;
 };
 
 /**
  * Updates progress bar.
- * @param {!FileTransferStatus} status
+ * @param {!chrome.fileManagerPrivate.FileTransferStatus} status
  * @private
  */
 SlideMode.prototype.updateProgressBar_ = function(status) {
   if (status.fileUrl !== this.loadingItemUrl_ ||
       status.num_total_jobs !== 1) {
     // If user starts to download another image (or file), we cannot show
     // determinate progress bar anymore since total and processed are for all
     // current downloads.
     this.progressBar_.setAttribute('indeterminate', true);
     return;
@@ skipping 381 matching lines @@
 /**
  * Handles mouse up events.
  * @param {!Event} event Wheel event.
  * @private
  */
 TouchHandler.prototype.onMouseUp_ = function(event) {
   if (event.button !== 0)
     return;
   this.clickStarted_ = false;
 };