Change gcl presubmit to only run commit hooks by default.

tests/gcl_unittest.py

 #!/usr/bin/python
 # Copyright (c) 2010 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."""
 
 # Fixes include path.
 from super_mox import mox, SuperMoxTestBase
 
@@ skipping 39 matching lines @@
         'ErrorExit', 'FILES_CACHE', 'FilterFlag', 'GenUsage',
         'GenerateChangeName', 'GenerateDiff', 'GetCLs', 'GetCacheDir',
         'GetCachedFile', 'GetChangelistInfoFile', 'GetChangesDir',
         'GetCodeReviewSetting', 'GetEditor', 'GetFilesNotInCL', 'GetInfoDir',
         'GetModifiedFiles', 'GetRepositoryRoot', 'ListFiles',
         'LoadChangelistInfoForMultiple', 'MISSING_TEST_MSG',
         'OptionallyDoPresubmitChecks', 'REPOSITORY_ROOT',
         'RunShell', 'RunShellWithReturnCode', 'SVN',
         'TryChange', 'UnknownFiles', 'Warn',
         'attrs', 'breakpad', 'defer_attributes', 'gclient_utils', 'getpass',
-        'json', 'main', 'need_change', 'need_change_and_args', 'no_args', 'os',
-        'random', 're', 'string', 'subprocess', 'sys', 'tempfile',
-        'time', 'upload', 'urllib2',
+        'json', 'main', 'need_change', 'need_change_and_args', 'no_args',
+        'optparse', 'os', 'random', 're', 'string', 'subprocess', 'sys',
+        'tempfile', 'time', 'upload', 'urllib2',
     ]
     # If this test fails, you should add the relevant test.
     self.compareMembers(gcl, members)
 
   def testIsSVNMoved(self):
     # TODO(maruel): TEST ME
     pass
 
   def testGetSVNFileProperty(self):
     # TODO(maruel): TEST ME
@@ skipping 294 matching lines @@
     try:
       gcl.CMDupload(['naame', '-s', 'foo'])
       self.fail()
     except SystemExit:
       pass
 
 
 if __name__ == '__main__':
   import unittest
   unittest.main()