Move recipe engine to third_party/recipe_engine.

scripts/slave/recipe_modules/gitiles/test_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 base64
 import hashlib
 
-from slave import recipe_test_api
+from recipe_engine import recipe_test_api
 
 class GitilesTestApi(recipe_test_api.RecipeTestApi):
   def _make_gitiles_response_json(self, data):
     return self.m.json.output(data)
 
   def make_refs_test_data(self, *refs):
     return self._make_gitiles_response_json({ref: None for ref in refs})
 
   def make_log_test_data(self, s, n=3):
     return self._make_gitiles_response_json({
@@ skipping 47 matching lines @@
         'new_mode': 33188,
         'new_path': f,
       } for f in new_files)
     return self._make_gitiles_response_json(d)
 
   def make_hash(self, *bases):
     return hashlib.sha1(':'.join(bases)).hexdigest()
 
   def make_encoded_file(self, data):
     return self.m.raw_io.output(base64.b64encode(data))