Add ability to specify and run post upload hooks

tests/presubmit_unittest.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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."""
 
 # pylint: disable=E1101,E1103
 
 import functools
@@ skipping 145 matching lines @@
     self.mox.StubOutWithMock(presubmit.scm.SVN, 'GenerateDiff')
     self.mox.StubOutWithMock(presubmit.scm.GIT, 'GenerateDiff')
 
 
 class PresubmitUnittest(PresubmitTestsBase):
   """General presubmit_support.py tests (excluding InputApi and OutputApi)."""
 
   _INHERIT_SETTINGS = 'inherit-review-settings-ok'
 
   def testMembersChanged(self):
+    self.maxDiff = None
     self.mox.ReplayAll()
     members = [
-      'AffectedFile', 'Change', 'DoGetTrySlaves', 'DoPresubmitChecks',
+      'AffectedFile', 'Change', 'DoGetTrySlaves',
+      'DoPostUploadExecuter', 'DoPresubmitChecks', 'GetPostUploadExecuter',
       'GetTrySlavesExecuter', 'GitAffectedFile', 'CallCommand', 'CommandData',
       'GitChange', 'InputApi', 'ListRelevantPresubmitFiles', 'Main',
       'NonexistantCannedCheckFilter', 'OutputApi', 'ParseFiles',
       'PresubmitFailure', 'PresubmitExecuter', 'PresubmitOutput', 'ScanSubDirs',
       'SvnAffectedFile', 'SvnChange', 'cPickle', 'cpplint', 'cStringIO',
       'contextlib', 'canned_check_filter', 'fix_encoding', 'fnmatch',
       'gclient_utils', 'glob', 'inspect', 'json', 'load_files', 'logging',
       'marshal', 'normpath', 'optparse', 'os', 'owners', 'pickle',
       'presubmit_canned_checks', 'random', 're', 'rietveld', 'scm',
       'subprocess', 'sys', 'tempfile', 'time', 'traceback', 'types', 'unittest',
@@ skipping 2687 matching lines @@
         owners_check=False)
     self.assertEqual(1, len(results))
     self.assertEqual(
         'Found line ending with white spaces in:', results[0]._message)
     self.checkstdout('')
 
 
 if __name__ == '__main__':
   import unittest
   unittest.main()