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

ui/file_manager/gallery/js/entry_list_watcher.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.
 
 /**
  * Watcher for entry lists.
  * It watches entries and remove the item if the entry is removed from file
  * system.
  * @param {!cr.ui.ArrayDataModel} list
  * @constructor
@@ skipping 85 matching lines @@
       case 0:
         break;
       default:
         assertNotReached();
         break;
     }
   }
 };
 
 /**
- * @param {!FileWatchEvent} event
+ * @param {!chrome.fileManagerPrivate.FileWatchEvent} event
  * @private
  */
 EntryListWatcher.prototype.onDirectoryChanged_ = function(event) {
   // Add '/' to the tail for checking if the each entry's URL is child URL of
   // the URL or not by using entryURL.indexOf(thisUrl) === 0.
   var url = event.entry.toURL().replace(/\/?$/, '/');
   var promiseList = [];
   var removedEntryURL = {};
   for (var i = 0; i < this.list_.length; i++) {
     var entry = this.getEntry(this.list_.item(i));
@@ skipping 14 matching lines @@
     while (i < this.list_.length) {
       var url = this.getEntry(this.list_.item(i)).toURL();
       if (removedEntryURL[url]) {
         this.list_.splice(i, 1);
       } else {
         i++;
       }
     }
   }.bind(this));
 };