Keep repo using http on incremental builds

bin/cros_repo_sync_all.py

 #!/usr/bin/python
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Stop gap sync function until cbuildbot is integrated into all builders"""
 
 import cbuildbot
 import optparse
 import sys
 
 """Number of retries to retry repo sync before giving up"""
 _NUMBER_OF_RETRIES=3
 
 def main():
   parser = optparse.OptionParser()
   parser.add_option('-r', '--buildroot',
                     help='root directory where sync occurs')
   parser.add_option('-c', '--clobber', action='store_true', default=False,
                     help='clobber build directory and do a full checkout')
   (options, args) = parser.parse_args()
   if options.buildroot:
     if options.clobber:
       cbuildbot._FullCheckout(options.buildroot, rw_checkout=False,
           retries=_NUMBER_OF_RETRIES)
     else:
-      cbuildbot._IncrementalCheckout(options.buildroot,
+      cbuildbot._IncrementalCheckout(options.buildroot, rw_checkout=False,
           retries=_NUMBER_OF_RETRIES)
   else:
     print >>sys.stderr, 'ERROR:  Must set buildroot'
     sys.exit(1)
 
 if __name__ == '__main__':
     main()