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

ui/file_manager/file_manager/foreground/js/directory_contents.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.
 
 /**
  * Scanner of the entries.
  * @constructor
  */
 function ContentScanner() {
   this.cancelled_ = false;
@@ skipping 239 matching lines @@
 
     var reader = entry.createReader();
     reader.readEntries(onSuccess, onError);
   }.bind(this);
 
   processEntry(this.entry_);
 };
 
 /**
  * Scanner of the entries for the metadata search on Drive File System.
- * @param {!DriveMetadataSearchContentScanner.SearchType} searchType The option
+ * @param {chrome.fileManagerPrivate.SearchType} searchType The option
  *     of the search.
  * @constructor
  * @extends {ContentScanner}
  */
 function DriveMetadataSearchContentScanner(searchType) {
   ContentScanner.call(this);
   this.searchType_ = searchType;
 }
 
 /**
  * Extends ContentScanner.
  */
 DriveMetadataSearchContentScanner.prototype.__proto__ =
     ContentScanner.prototype;
 
 /**
- * The search types on the Drive File System.
- * @enum {string}
- */
-DriveMetadataSearchContentScanner.SearchType = {
-  SEARCH_ALL: 'ALL',
-  SEARCH_SHARED_WITH_ME: 'SHARED_WITH_ME',
-  SEARCH_RECENT_FILES: 'EXCLUDE_DIRECTORIES',
-  SEARCH_OFFLINE: 'OFFLINE'
-};
-Object.freeze(DriveMetadataSearchContentScanner.SearchType);
-
-/**
  * Starts to metadata-search on Drive File System.
  * @override
  */
 DriveMetadataSearchContentScanner.prototype.scan = function(
     entriesCallback, successCallback, errorCallback) {
   chrome.fileManagerPrivate.searchDriveMetadata(
       {query: '', types: this.searchType_, maxResults: 500},
       function(results) {
         if (this.cancelled_) {
           errorCallback(util.createDOMError(util.FileError.ABORT_ERR));
@@ skipping 602 matching lines @@
       });
 };
 
 /**
  * Creates a DirectoryContents instance to show the result of metadata search
  * on Drive File System.
  *
  * @param {FileListContext} context File list context.
  * @param {!FakeEntry} fakeDirectoryEntry Fake directory entry representing the
  *     set of result entries. This serves as a top directory for the search.
- * @param {!DriveMetadataSearchContentScanner.SearchType} searchType The type of
+ * @param {chrome.fileManagerPrivate.SearchType} searchType The type of
  *     the search. The scanner will restricts the entries based on the given
  *     type.
  * @return {DirectoryContents} Created DirectoryContents instance.
  */
 DirectoryContents.createForDriveMetadataSearch = function(
     context, fakeDirectoryEntry, searchType) {
   return new DirectoryContents(
       context,
       true,  // Search
       fakeDirectoryEntry,
       function() {
         return new DriveMetadataSearchContentScanner(searchType);
       });
 };