Move recipe engine to third_party/recipe_engine.

scripts/slave/recipe_modules/cronet/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.
 
 """Common steps for recipes that sync/build Cronet sources."""
 
 from infra.libs.infra_types import freeze
-from slave import recipe_api
+from recipe_engine import recipe_api
 
 INSTRUMENTATION_TESTS = freeze([
   {
     'test': 'CronetSampleTest',
     'gyp_target': 'cronet_sample_test_apk',
     'kwargs': {
       'install_apk': {
         'package': 'org.chromium.cronet_sample_apk',
         'apk': 'CronetSample.apk'
       },
@@ skipping 71 matching lines @@
     droid.common_tests_setup_steps()
     with self.m.step.defer_results():
       for suite in UNIT_TESTS:
         droid.run_test_suite(suite)
       for suite in INSTRUMENTATION_TESTS:
         droid.run_instrumentation_suite(
             suite['test'], verbose=True,
             **suite.get('kwargs', {}))
       droid.common_tests_final_steps()