Add author to Change object. Don't set it yet.

git_cl.py

 #!/usr/bin/env python
 # Copyright (c) 2011 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.
 
 # Copyright (C) 2008 Evan Martin <martine@danga.com>
 
 """A git-command for integrating reviews on Rietveld."""
 
 import errno
@@ skipping 819 matching lines @@
   issue = ConvertToInteger(cl.GetIssue())
   patchset = ConvertToInteger(cl.GetPatchset())
   if issue:
     description = cl.GetDescription()
   else:
     # If the change was never uploaded, use the log messages of all commits
     # up to the branch point, as git cl upload will prefill the description
     # with these log messages.
     description = RunCommand(['git', 'log', '--pretty=format:%s%n%n%b',
                               '%s...' % (upstream_branch)]).strip()
-  change = presubmit_support.GitChange(name, description, absroot, files,
-                                       issue, patchset)
+  change = presubmit_support.GitChange(
+      name,
+      description,
+      absroot,
+      files,
+      issue,
+      patchset,
+      None)
 
   # Apply watchlists on upload.
   if not committing:
     watchlist = watchlists.Watchlists(change.RepositoryRoot())
     files = [f.LocalPath() for f in change.AffectedFiles()]
     cl.SetWatchers(watchlist.GetWatchersForPaths(files))
 
   try:
     output = presubmit_support.DoPresubmitChecks(change, committing,
         verbose=verbose, output_stream=sys.stdout, input_stream=sys.stdin,
@@ skipping 593 matching lines @@
              'and retry or visit go/isgaeup.\n%s') % (e.code, str(e)))
 
   # Not a known command. Default to help.
   GenUsage(parser, 'help')
   return CMDhelp(parser, argv)
 
 
 if __name__ == '__main__':
   fix_encoding.fix_encoding()
   sys.exit(main(sys.argv[1:]))