Add repository root presubmit support.

tests/gcl_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 gcl.py."""
 
 import StringIO
 import os
 import sys
@@ skipping 61 matching lines @@
     # If this test fails, you should add the relevant test.
     self.compareMembers(gcl, members)
 
 
   def testHelp(self):
     old_stdout = sys.stdout
     try:
       dummy = StringIO.StringIO()
       gcl.sys.stdout = dummy
       gcl.Help()
-      self.assertEquals(len(dummy.getvalue()), 1815)
+      self.assertEquals(len(dummy.getvalue()), 1832)
     finally:
       gcl.sys.stdout = old_stdout
 
   def testGetRepositoryRootNone(self):
     gcl.REPOSITORY_ROOT = None
     gcl.os.getcwd().AndReturn("/bleh/prout")
     result = {
       "Repository Root": ""
     }
     gcl.gclient.CaptureSVNInfo("/bleh/prout", print_error=False).AndReturn(
@@ skipping 185 matching lines @@
                   ['--issue', '1', '--patchset', '2'],
                   swallow_exception=True)
     gcl.os.chdir('somewhere')
     self.mox.ReplayAll()
     gcl.UploadCL(change_info, args)
     self.mox.VerifyAll()
 
 
 if __name__ == '__main__':
   unittest.main()