Docserver: Automatically implement FileSystem.Stat if FileSystem.StatAsync has

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

 # Copyright 2014 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 base64 import b64decode
 from itertools import izip
 import json
 import posixpath
 import traceback
 
@@ skipping 139 matching lines @@
     #   {
     #     "commit": "8fd578e1a7b142cd10a4387861f05fb9459b69e2", # Commit ID.
     #     "tree": "3ade65d8a91eadd009a6c9feea8f87db2c528a53",   # Tree ID.
     #     "author": {...},
     #     "committer": {...},
     #     "message": <codereview message>,
     #     ...
     #   }
     return content_future.Then(lambda json: _ParseGitilesJson(json)['commit'])
 
-  def Stat(self, path):
-    return self.StatAsync(path).Get()
-
   def StatAsync(self, path):
     dir_, filename = posixpath.split(path)
     def stat(content):
       stat_info = _CreateStatInfo(content)
       if stat_info.version is None:
         raise FileSystemError('Failed to find version of dir %s' % dir_)
       if IsDirectory(path):
         return stat_info
       if filename not in stat_info.child_versions:
         raise FileNotFoundError(
             '%s from %s was not in child versions for Stat' % (filename, path))
       return StatInfo(stat_info.child_versions[filename])
     fetch_future = self._FetchAsync(ToDirectory(dir_) + _JSON_FORMAT)
     return self._ResolveFetchContent(path, fetch_future).Then(stat)
 
   def GetIdentity(self):
     return '@'.join((self.__class__.__name__,
                      StringIdentity(self._commit or self._branch)))