[WIP] Provided file system from NACL.

storage/common/fileapi/file_system_types.h

 // 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.
 
 #ifndef STORAGE_COMMON_FILEAPI_FILE_SYSTEM_TYPES_H_
 #define STORAGE_COMMON_FILEAPI_FILE_SYSTEM_TYPES_H_
 
 #include "third_party/WebKit/public/platform/WebFileSystemType.h"
 
 namespace storage {
@@ skipping 104 matching lines @@
   // via regular OpenFileSystem, and provides private filesystem space for
   // given identifier in each origin.
   kFileSystemTypePluginPrivate,
 
   // A filesystem that is mounted via the Privet storage protocol.
   kFileSystemTypeCloudDevice,
 
   // A filesystem that is mounted via the FileSystemProvider API.
   kFileSystemTypeProvided,
 
+  // A plugin filesystem that is mounted via the FileSystemProvider API.
+  kFileSystemTypePluginProvided,
   // A media filesystem such as MTP or PTP, mounted as a file storage not
   // limited to media files.
   kFileSystemTypeDeviceMediaAsFileStorage,
 
   // --------------------------------------------------------------------
   // Marks the end of internal type enum. (This is not the actual fs type)
   // New internal filesystem types must be added above this line.
   kFileSystemInternalTypeEnumEnd,
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_COMMON_FILEAPI_FILE_SYSTEM_TYPES_H_