Docserver: Persist stat cache for versioned file systems

chrome/common/extensions/docs/server2/new_github_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.
 
 import json
 import logging
 from cStringIO import StringIO
 import posixpath
 import traceback
 from zipfile import ZipFile
@@ skipping 267 matching lines @@
     version = self._stat_cache.Get(self._repo_key).Get()
     assert version is not None, ('There was a zipball in datastore; there '
                                  'should be a version cached for it')
 
     stat_info = StatInfo(version)
     if IsDirectory(path):
       stat_info.child_versions = dict((p, StatInfo(version))
                                       for p in repo_zip.List(path))
     return stat_info
 
-  def GetIdentity(self):
+  def GetStableIdentity(self):
     return '%s' % StringIdentity(self.__class__.__name__ + self._repo_key)
 
   def __repr__(self):
     return '%s(key=%s, url=%s)' % (type(self).__name__,
                                    self._repo_key,
                                    self._repo_url)