MD Bookmarks: Batch updates to the UI when processing deletes and moves

chrome/common/extensions/api/bookmark_manager_private.json

 // 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.
 
 [
   {
     "namespace": "bookmarkManagerPrivate",
     "description": "none",
     "types": [
       {
@@ skipping 153 matching lines @@
             "name": "parentId",
             "description": "The ID of the folder that the drop was made.",
             "type": "string"
           },
           {
             "name": "index",
             "description": "The index of the position to drop at. If left out the dropped items will be placed at the end of the existing children.",
             "type": "integer",
             "minimum": 0,
             "optional": true
-          }
+          },
+          {"type": "function", "name": "callback", "optional": true, "parameters": []}
         ]
       },
       {
         "name": "getSubtree",
         "type": "function",
         "description": "Retrieves a bookmark hierarchy from the given node.  If the node id is empty, it is the full tree.  If foldersOnly is true, it will only return folders, not actual bookmarks.",
         "parameters": [
           {
             "name": "id",
             "type": "string",
@@ skipping 241 matching lines @@
         "type": "function",
         "description": "Fired when the meta info of a node changes.",
         "parameters": [
           {"name": "id", "type": "string"},
           {"name": "metaInfoChanges", "$ref": "MetaInfoFields"}
         ]
       }
     ]
   }
 ]