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

ui/file_manager/file_manager/foreground/js/directory_contents.js

Index: ui/file_manager/file_manager/foreground/js/directory_contents.js
diff --git a/ui/file_manager/file_manager/foreground/js/directory_contents.js b/ui/file_manager/file_manager/foreground/js/directory_contents.js
index b1236a974937a5c31e38da49000467a240658a20..af84cabad1a6d911ce05f1e828a1367aee98c655 100644
--- a/ui/file_manager/file_manager/foreground/js/directory_contents.js
+++ b/ui/file_manager/file_manager/foreground/js/directory_contents.js
@@ -257,7 +257,7 @@ LocalSearchContentScanner.prototype.scan = function(
 
 /**
  * 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}
@@ -274,18 +274,6 @@ 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
  */
@@ -908,7 +896,7 @@ DirectoryContents.createForLocalSearch = function(
  * @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.