Fix trychange unittest.

tests/trychange_unittest.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.
 
 """Unit tests for trychange.py."""
 
 import unittest
 
 # Local imports
@@ skipping 10 matching lines @@
 class TryChangeUnittest(TryChangeTestsBase):
   """General trychange.py tests."""
   def testMembersChanged(self):
     members = [
       'EscapeDot', 'GIT', 'GetSourceRoot',
       'GetTryServerSettings', 'GuessVCS',
       'HELP_STRING', 'InvalidScript', 'NoTryServerAccess', 'PathDifference',
       'RunCommand', 'SCM', 'SVN', 'TryChange', 'USAGE',
       'datetime', 'gcl', 'gclient', 'gclient_scm', 'getpass', 'logging',
       'optparse', 'os', 'shutil', 'socket', 'sys', 'tempfile', 'traceback',
-      'upload', 'urllib',
+      'upload', 'urllib', 'subprocess',
     ]
     # If this test fails, you should add the relevant test.
     self.compareMembers(trychange, members)
 
 
 class SVNUnittest(TryChangeTestsBase):
   """trychange.SVN tests."""
   def testMembersChanged(self):
     members = [
       'GenerateDiff', 'ProcessOptions', 'options'
     ]
     # If this test fails, you should add the relevant test.
     self.compareMembers(trychange.SVN(None), members)
 
 
 class GITUnittest(TryChangeTestsBase):
   """trychange.GIT tests."""
   def testMembersChanged(self):
     members = [
       'GenerateDiff', 'GetEmail', 'GetPatchName', 'ProcessOptions', 'options'
     ]
     # If this test fails, you should add the relevant test.
     self.compareMembers(trychange.GIT(None), members)
 
 
 if __name__ == '__main__':
   unittest.main()