Docserver: make file_system a property of Create

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 sys
 from zipfile import BadZipfile, ZipFile
 
@@ skipping 186 matching lines @@
     child_paths = {}
     if path.endswith('/'):
       # Deal with a directory
       for f in filter(lambda s: s.startswith(path), trimmed):
         filename = f[len(path):]
         if not '/' in filename and not f == path:
           child_paths[filename] = StatInfo(version)
 
     return StatInfo(version, child_paths or None)
 
-  def GetDebugString(self):
-    return ' %s: %s' % (self._repo_key, self._repo_url)
-
   def GetIdentity(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)