Devserver: have a separate ObjectStore namespace (both memcache and datastore)

chrome/common/extensions/docs/server2/file_system.py

 # 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.
 
 import os
 
 class FileNotFoundError(Exception):
   def __init__(self, filename):
     Exception.__init__(self, filename)
 
@@ skipping 51 matching lines @@
     the directory in |StatInfo.child_versions|.
     '''
     raise NotImplementedError()
 
   @classmethod
   def GetName(cls):
     '''The type of the file system, exposed for caching classes to namespace
     their caches. It is unlikely that this needs to be overridden.
     '''
     return cls.__name__
-
-  @classmethod
-  def GetVersion(cls):
-    '''The version of the file system, exposed for caching classes backed to
-    file systems. It is unlikely that this needs to be overridden.
-    '''
-    return None