Add missing import from r26426....

trychange.py

 #!/usr/bin/python
 # Copyright (c) 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.
 """Client-side script to send a try job to the try server. It communicates to
 the try server by either writting to a svn repository or by directly connecting
 to the server by HTTP.
 """
 
 
 import datetime
 import getpass
 import logging
 import optparse
 import os
 import shutil
 import socket
 import sys
 import tempfile
 import traceback
 import urllib
 
 import gcl
 import gclient
+import gclient_scm
 import upload
 
 __version__ = '1.1.1'
 
 
 # Constants
 HELP_STRING = "Sorry, Tryserver is not available."
 USAGE = r"""%prog [options]
 
 Client-side script to send a try job to the try server. It communicates to
@@ skipping 496 matching lines @@
     if patch_name == 'Unnamed':
       print "Note: use --name NAME to change the try's name."
   except (InvalidScript, NoTryServerAccess), e:
     if swallow_exception:
       return
     print e
 
 
 if __name__ == "__main__":
   TryChange(None, None, False)