Rename retcode to returncode to be consistent with subprocess.

tests/gclient_utils_test.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.
 
 import StringIO
 
 # Fixes include path.
 from super_mox import SuperMoxTestBase
 
@@ skipping 47 matching lines @@
         stderr=None,
         stdout=gclient_utils.subprocess.PIPE).AndReturn(process)
     process.communicate().AndReturn(['bleh', 'foo'])
     self.mox.ReplayAll()
     try:
       gclient_utils.CheckCall(args)
       self.fail()
     except gclient_utils.CheckCallError, e:
       self.assertEqual(e.command, args)
       self.assertEqual(e.cwd, None)
-      self.assertEqual(e.retcode, 42)
+      self.assertEqual(e.returncode, 42)
       self.assertEqual(e.stdout, 'bleh')
       self.assertEqual(e.stderr, 'foo')
 
 
 class CheckCallAndFilterTestCase(GclientUtilBase):
   class ProcessIdMock(object):
     def __init__(self, test_string):
       self.stdout = StringIO.StringIO(test_string)
     def wait(self):
         pass
@@ skipping 76 matching lines @@
     out_url, out_rev = gclient_utils.SplitUrlRevision("%s@%s" % (url, rev))
     self.assertEquals(out_rev, rev)
     self.assertEquals(out_url, url)
 
 
 if __name__ == '__main__':
   import unittest
   unittest.main()
 
 # vim: ts=2:sw=2:tw=80:et: