Move recipe engine to third_party/recipe_engine.

scripts/slave/recipe_modules/syzygy/api.py

 # Copyright 2014 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 ast
 import os
 import re
 
-from slave import recipe_api
+from recipe_engine import recipe_api
 
 
 class SyzygyApi(recipe_api.RecipeApi):
   # Used for constructing URLs to the Syzygy archives.
   _SYZYGY_ARCHIVE_URL = (
       'https://syzygy-archive.commondatastorage.googleapis.com')
   _SYZYGY_GS = 'gs://syzygy-archive'
   _SYZYGY_GITHUB = 'https://github.com/google/syzygy/commit/'
 
   # Fake unittests.gypi contents.
@@ skipping 301 matching lines @@
             '--overwrite',
             '--verbose']
     return self.m.python('download_binaries', get_syzygy_binaries_py, args)
 
   def smoke_test(self):
     """Returns a step that launches the smoke test script."""
     smoke_test_py = self.internal_scripts_dir.join('smoke_test.py')
     build_dir = self.m.path['checkout'].join('build')
     args = ['--verbose', '--build-dir', build_dir]
     return self.m.python('smoke_test', smoke_test_py, args)