New API to copy syncfs folder to localfs.

chrome/common/extensions/api/developer_private.idl

 // 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.
 
 // developerPrivate API.
 // This is a private API exposing developing and debugging functionalities for
 // apps and extensions.
 namespace developerPrivate {
 
   enum ItemType {
@@ skipping 157 matching lines @@
                        optional VoidCallback callback);
 
     // Allow / Disallow item with |item_id| in incognito mode.
     static void allowIncognito(DOMString item_id,
                                boolean allow,
                                VoidCallback callback);
 
     // Load a user selected unpacked item
     static void loadUnpacked(optional VoidCallback callback);
 
-    // Copies the syncfs folder for the extension to local disk.
-    static void exportSyncfsFolderToLocalfs(DOMString folder_name,
-                                            optional VoidCallback callback);
-
-    // Loads the unpacked app / extension.
-    // |callback| called with itemId of the loaded item.
-    static void loadProject(DOMString project_name,
-                            PathCallback callback);
+    // Loads an extension / app from a given |directory|
+    static void loadDirectory([instanceOf=DirectoryEntry] object directory,
+                        PathCallback callback);
 
     // Open Dialog to browse to an entry.
     // |select_type| : Select a file or a folder.
     // |file_type| : Required file type. For Example pem type is for private
     // key and load type is for an unpacked item.
     // |callback| : called with selected item's path.
     static void choosePath(SelectType select_type,
                            FileType file_type,
                            PathCallback callback);
 
@@ skipping 12 matching lines @@
     // Returns true if the profile is managed.
     static void isProfileManaged(BooleanCallback callback);
   };
 
   interface Events {
     // Fired when a item state is changed.
     static void onItemStateChanged(EventData response);
   };
 
 };