Remove the default values and add a comprehensible error message.

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 14 matching lines @@
     self.mox.StubOutWithMock(gcl.gclient_utils, 'FileWrite')
     gcl.REPOSITORY_ROOT = None
 
 
 class GclUnittest(GclTestsBase):
   """General gcl.py tests."""
   def testMembersChanged(self):
     self.mox.ReplayAll()
     members = [
         'CODEREVIEW_SETTINGS', 'CODEREVIEW_SETTINGS_FILE',
+        'CODEREVIEW_SETTINGS_FILE_NOT_FOUND',
         'CMDchange', 'CMDchanges', 'CMDcommit', 'CMDdelete', 'CMDdeleteempties',
         'CMDdescription', 'CMDdiff', 'CMDhelp', 'CMDlint', 'CMDnothave',
         'CMDopened', 'CMDpassthru', 'CMDpresubmit', 'CMDrename', 'CMDsettings',
         'CMDstatus', 'CMDtry', 'CMDupload',
         'ChangeInfo', 'Command', 'DEFAULT_LINT_IGNORE_REGEX',
         'DEFAULT_LINT_REGEX', 'CheckHomeForFile', 'DoPresubmitChecks',
         'ErrorExit', 'FILES_CACHE', 'FilterFlag', 'GenUsage',
         'GenerateChangeName', 'GenerateDiff', 'GetCLs', 'GetCacheDir',
         'GetCachedFile', 'GetChangelistInfoFile', 'GetChangesDir',
         'GetCodeReviewSetting', 'GetEditor', 'GetFilesNotInCL', 'GetInfoDir',
@@ skipping 240 matching lines @@
     self.mox.ReplayAll()
 
     gcl.CMDupload(['naame', '--no_watchlists'])
     self.assertEquals(change_info.issue, 1)
     self.assertEquals(change_info.patchset, 2)
 
 
 if __name__ == '__main__':
   import unittest
   unittest.main()