Docserver: Use GitilesFileSystem instead of SubversionFileSystem

chrome/common/extensions/docs/server2/caching_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 posixpath
 import sys
 
 from file_system import FileSystem, StatInfo, FileNotFoundError
 from future import Future
 from path_util import IsDirectory, ToDirectory
@@ skipping 15 matching lines @@
     self._stat_object_store = create_object_store('stat')
     # The read caches can start populated (start_empty=False) because file
     # updates are picked up by the stat, so it doesn't need the force-refresh
     # which starting empty is designed for. Without this optimisation, cron
     # runs are extra slow.
     self._read_object_store = create_object_store('read', start_empty=False)
 
   def Refresh(self):
     return self._file_system.Refresh()
 
+  def GetCommitID(self):
+    return self._file_system.GetCommitID()
+
   def Stat(self, path):
     return self.StatAsync(path).Get()
 
   def StatAsync(self, path):
     '''Stats the directory given, or if a file is given, stats the file's parent
     directory to get info about the file.
     '''
     # Always stat the parent directory, since it will have the stat of the child
     # anyway, and this gives us an entire directory's stat info at once.
     dir_path, file_path = posixpath.split(path)
@@ skipping 79 matching lines @@
       return new_results
     # Read in the values that were uncached or old.
     return self._file_system.Read(set(paths) - set(fresh_data.iterkeys()),
                                   skip_not_found=skip_not_found).Then(next)
 
   def GetIdentity(self):
     return self._file_system.GetIdentity()
 
   def __repr__(self):
     return '%s of <%s>' % (type(self).__name__, repr(self._file_system))