Add RunPylint as a canned presubmit check.

tests/presubmit_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 presubmit_support.py and presubmit_canned_checks.py."""
 
 import StringIO
 
 # Fixes include path.
@@ skipping 1119 matching lines @@
       'CheckChangeHasQaField', 'CheckChangeHasTestedField',
       'CheckChangeHasTestField',
       'CheckChangeLintsClean',
       'CheckChangeSvnEolStyle',
       'CheckLicense',
       'CheckSvnModifiedDirectories',
       'CheckSvnForCommonMimeTypes', 'CheckSvnProperty',
       'CheckDoNotSubmit',
       'CheckDoNotSubmitInDescription', 'CheckDoNotSubmitInFiles',
       'CheckLongLines', 'CheckTreeIsOpen', 'RunPythonUnitTests',
+      'RunPylint',
       'CheckBuildbotPendingBuilds', 'CheckRietveldTryJobExecution',
     ]
     # If this test fails, you should add the relevant test.
     self.compareMembers(presubmit_canned_checks, members)
 
   def DescriptionTest(self, check, description1, description2, error_type,
                       committing):
     change1 = presubmit.Change('foo1', description1, self.fake_root_dir, None,
                                0, 0)
     input_api1 = self.MockInputApi(change1, committing)
@@ skipping 597 matching lines @@
     results = presubmit_canned_checks.CheckBuildbotPendingBuilds(
         input_api, presubmit.OutputApi, 'uurl', 2, ('foo'))
     self.assertEquals(len(results), 1)
     self.assertEquals(results[0].__class__,
         presubmit.OutputApi.PresubmitNotifyResult)
 
 
 if __name__ == '__main__':
   import unittest
   unittest.main()