Move recipe engine to third_party/recipe_engine.

third_party/recipe_engine/unittests/field_composer_test.py

 #!/usr/bin/env python
 # Copyright 2013 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 os
 import shutil
+import sys
 import tempfile
 import unittest
 
-import test_env  # pylint: disable=W0403,W0611
-import sys
-from slave import field_composer
+sys.path.append(os.path.dirname(os.path.dirname(os.path.dirname(
+    os.path.abspath(__file__)))))
+
+from recipe_engine import field_composer
 
 
 # Functors are compared by reference.
 BEAUTY_LAMBDA = lambda x, y: x + y + 1
 
 
 class TestFieldComposer(unittest.TestCase):
 
   def setUp(self):
     super(TestFieldComposer, self).setUp()
@@ skipping 47 matching lines @@
   def test_compose_with_sneaky_bad_registry(self):
     """RegistryConflict must be raised when functors clash."""
     second_fc = field_composer.FieldComposer(
         {}, {'beauty': {'combine': lambda x, y: 0}})
     with self.assertRaises(field_composer.RegistryConflict):
       self.fc.compose(second_fc)
 
 
 if __name__ == '__main__':
   unittest.main()