Docserver: refactor Servlet, ObjectStore, and ServerInstance architecture to

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

 # Copyright 2013 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.
 
 from file_system import FileSystem, FileNotFoundError
 
 class OfflineFileSystem(FileSystem):
   '''An offline FileSystem which masquerades as another file system. It throws
-  FileNotFound error for all operations, and overrides GetName and GetVersion.
+  FileNotFound error for all operations, and overrides GetIdentity.
   '''
-  def __init__(self, cls):
-    self._cls = cls
+  def __init__(self, fs):
+    self._fs = fs
 
   def Read(self, paths, binary=False):
     raise FileNotFoundError('File system is offline, cannot read %s' % paths)
 
   def Stat(self, path):
     raise FileNotFoundError('File system is offline, cannot read %s' % path)
 
-  # HACK: despite GetName being a @classmethod, these need to be instance
-  # methods so that we can grab the name from the class given on construction.
-  def GetName(self):
-    return self._cls.GetName()
+  def GetIdentity(self):
+    return self._fs.GetIdentity()