Make the MockDRT implementation work again and add support for --actuals.

Tools/Scripts/webkitpy/layout_tests/run_webkit_tests_integrationtest.py

 # Copyright (C) 2010 Google Inc. All rights reserved.
 # Copyright (C) 2010 Gabor Rapcsanyi (rgabor@inf.u-szeged.hu), University of Szeged
 # Copyright (C) 2011 Apple Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
@@ skipping 944 matching lines @@
             "platform/test-mac-leopard/failures/expected/missing_image", [".txt", ".png"], err)
 
 
 class PortTest(unittest.TestCase):
     def assert_mock_port_works(self, port_name, args=[]):
         self.assertTrue(passing_run(args + ['--platform', 'mock-' + port_name, 'fast/harness/results.html'], tests_included=True, host=Host()))
 
     def disabled_test_mac_lion(self):
         self.assert_mock_port_works('mac-lion')
 
-    def disabled_test_mac_lion_in_test_shell_mode(self):
-        self.assert_mock_port_works('mac-lion', args=['--additional-drt-flag=--test-shell'])
-
-    def disabled_test_qt_linux(self):
-        self.assert_mock_port_works('qt-linux')
-
-    def disabled_test_mac_lion(self):
-        self.assert_mock_port_works('mac-lion')
-
 
 class MainTest(unittest.TestCase):
     def test_exception_handling(self):
         orig_run_fn = run_webkit_tests.run
 
         # unused args pylint: disable=W0613
         def interrupting_run(port, options, args, stderr):
             raise KeyboardInterrupt
 
         def successful_run(port, options, args, stderr):
@@ skipping 15 matching lines @@
 
             run_webkit_tests.run = successful_run
             res = run_webkit_tests.main(['--platform', 'test'], stdout, stderr)
             self.assertEqual(res, -1)
 
             run_webkit_tests.run = exception_raising_run
             res = run_webkit_tests.main([], stdout, stderr)
             self.assertEqual(res, run_webkit_tests.EXCEPTIONAL_EXIT_STATUS)
         finally:
             run_webkit_tests.run = orig_run_fn