Have 'fetch chromium' set up with .DEPS.git to support recursion.

recipes/infra.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.
 
 import sys
 
 import recipe_util  # pylint: disable=F0401
 
 
 # This class doesn't need an __init__ method, so we disable the warning
 # pylint: disable=W0232
 class Infra(recipe_util.Recipe):
   """Basic Recipe class for the Infrastructure repositories."""
 
   @staticmethod
   def fetch_spec(_props):
     solution = lambda name, path_infix = None: {
       'name'     : name,
       'url'      : 'https://chromium.googlesource.com/infra/%s%s.git' % (
         path_infix + '/' if path_infix else '', name
       ),
-      'deps_file': 'DEPS',
+      'deps_file': '.DEPS.git',
       'managed'  : False,
     }
     spec = {
         'solutions': [
           solution('infra'),
           solution('expect_tests', 'testing'),
           solution('testing_support', 'testing'),
         ],
     }
     return {
         'type': 'gclient_git',
         'gclient_git_spec': spec,
     }
 
   @staticmethod
   def expected_root(_props):
     return 'infra'
 
 
 def main(argv=None):
   return Infra().handle_args(argv)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))