Revert "Remove all safesync_url functionality from gclient"

fetch_configs/dartino.py

 # Copyright 2015 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 sys
 
 import config_util  # pylint: disable=F0401
 
 # This class doesn't need an __init__ method, so we disable the warning
 # pylint: disable=W0232
 class Dartino(config_util.Config):
   """Basic Config class for Dartino."""
 
   @staticmethod
   def fetch_spec(props):
     url = 'https://github.com/dartino/sdk.git'
     solution = {
       'name'   :'sdk',
       'url'    : url,
       'deps_file': 'DEPS',
       'managed'   : False,
       'custom_deps': {},
+      'safesync_url': '',
     }
     spec = {
       'solutions': [solution],
     }
     if props.get('target_os'):
       spec['target_os'] = props['target_os'].split(',')
     return {
       'type': 'gclient_git',
       'gclient_git_spec': spec,
     }
 
   @staticmethod
   def expected_root(_props):
     return 'sdk'
 
 
 def main(argv=None):
   return Dartino().handle_args(argv)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))