[File Manager] Add/remove Google Drive folder in the open File Manager when Drive enabled/disabled …

chrome/common/extensions/api/file_browser_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":"fileBrowserPrivate",
     "nodoc": "true",
     "types": [
       {
@@ skipping 850 matching lines @@
         "description": "Retrieves GData-related preferences .",
         "parameters": [
           {
             "name": "callback",
             "type": "function",
             "parameters": [
               {
                 "name": "result",
                 "type": "object",
                 "properties": {
+                  "driveEnabled": {"type":"boolean"},
                   "cellularDisabled": {"type":"boolean"},
                   "hostedFilesDisabled": {"type":"boolean"}
                 }
               }
             ]
           }
         ]
       },
       {
         "name": "setGDataPreferences",
@@ skipping 122 matching lines @@
       },
       {
         "name": "onNetworkConnectionChanged",
         "type": "function",
         "description": "Fired when the active network connection state changes. The network connection state can be retrieved via 'getNetworkConnectionState'.",
         "parameters": []
       }
     ]
   }
 ]