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 106 matching lines @@
       # Update the cache. This is a path -> (data, version) mapping.
       self._read_object_store.SetMulti(
           dict((path, (new_result, stat_futures[path].Get().version))
                for path, new_result in new_results.iteritems()))
       new_results.update(fresh_data)
       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 GetCommitID(self):
+    return self._file_system.GetCommitID()
+
+  def GetPreviousCommitID(self):
+    return self._file_system.GetPreviousCommitID()
+
   def GetIdentity(self):
     return self._file_system.GetIdentity()
 
   def __repr__(self):
     return '%s of <%s>' % (type(self).__name__, repr(self._file_system))