Move recipe engine to third_party/recipe_engine.

scripts/slave/recipe_modules/v8/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.
 
 # Exposes the builder and recipe configurations to GenTests in recipes.
 
-from slave import recipe_test_api
+from recipe_engine import recipe_test_api
 from . import builders
 
 class V8TestApi(recipe_test_api.RecipeTestApi):
   BUILDERS = builders.BUILDERS
   SLOWEST_TESTS = [
     {
       'name': 'mjsunit/Cool.Test',
       'flags': ['-f'],
       'command': 'd8 -f mjsunit/Cool.Test',
       'duration': 61.0028,
@@ skipping 173 matching lines @@
   @staticmethod
   def perf_failures(has_failures):
     return has_failures
 
   def __call__(self, test_failures=False, wrong_results=False,
                perf_failures=False, flakes=False):
     return (self.test_failures(test_failures) +
             self.wrong_results(wrong_results) +
             self.flakes(flakes) +
             self.perf_failures(perf_failures))