Starts converting GclChange to a method-less class.

tests/presubmit_unittest.py

 #!/usr/bin/python
 # Copyright (c) 2006-2009 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 presubmit_support.py and presubmit_canned_checks.py."""
 
 import os
 import StringIO
 import sys
@@ skipping 119 matching lines @@
         'blat.cc',
         'foo/haspresubmit/yodle/smart.h',
         'moo/mat/gat/yo.h',
         'foo/luck.h'])
     self.failUnless(len(presubmit_files) == 2)
     self.failUnless(presubmit.normpath('PRESUBMIT.py') in presubmit_files)
     self.failUnless(presubmit.normpath('foo/haspresubmit/PRESUBMIT.py') in
                     presubmit_files)
 
   def testTagLineRe(self):
-    m = presubmit._tag_line_re.match(' BUG =1223, 1445  \t')
+    m = presubmit.GclChange._tag_line_re.match(' BUG =1223, 1445  \t')
     self.failUnless(m)
     self.failUnlessEqual(m.group('key'), 'BUG')
     self.failUnlessEqual(m.group('value'), '1223, 1445')
 
   def testGclChange(self):
     description_lines = ('Hello there',
                          'this is a change',
                          'BUG=123',
                          ' STORY =http://foo/  \t',
                          'and some more regular text  \t')
@@ skipping 632 matching lines @@
     # TODO(maruel): Add real tests.
     self.failIf(presubmit_canned_checks.RunPythonUnitTests(
         self.MockInputApi(),
         presubmit.OutputApi, []))
     self.failUnless(presubmit_canned_checks.RunPythonUnitTests(
         self.MockInputApi(),
         presubmit.OutputApi, ['non_existent_module']))
 
 if __name__ == '__main__':
   unittest.main()