Don't run presubmit scripts when reverting.

revert.py

 #!/usr/bin/python
 # Copyright (c) 2006-2009 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.
 #
 # Tool to quickly revert a change.
 
 import exceptions
 import optparse
 import os
@@ skipping 198 matching lines @@
 
   description = "Reverting %s." % revisions_string
   if message:
     description += "\n\n"
     description += message
   # Don't use gcl.Change() since it prompts the user for infos.
   change_info = gcl.ChangeInfo(name=changename, issue='',
                                description=description, files=files_status)
   change_info.Save()
 
-  upload_args = ['-r', ",".join(reviewers)]
+  upload_args = ['--no_presubmit', '-r', ",".join(reviewers)]
   if send_email:
     upload_args.append('--send_mail')
   if commit:
     upload_args.append('--no_try')
   gcl.UploadCL(change_info, upload_args)
 
   retcode = 0
   if commit:
-    gcl.Commit(change_info, ['--force'])
+    gcl.Commit(change_info, ['--no_presubmit', '--force'])
     # TODO(maruel):  gclient sync (to leave the local checkout in an usable
     # state)
     retcode = gclient.Main(["gclient.py", "sync"])
   return retcode
 
 
 def Main(argv):
   usage = (
 """%prog [options] [revision numbers to revert]
 Revert a set of revisions, send the review to Rietveld, sends a review email
@@ skipping 36 matching lines @@
     print "".join(e.args)
     print "You can use the --force flag to revert the files."
   except OutsideOfCheckout, e:
     print "Your repository doesn't contain ", str(e)
 
   return retcode
 
 
 if __name__ == "__main__":
   sys.exit(Main(sys.argv))