Move recipe engine to third_party/recipe_engine.

scripts/slave/recipe_modules/gclient/config.py

 # 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 types
 
-from slave.recipe_config import config_item_context, ConfigGroup, BadConf
-from slave.recipe_config import ConfigList, Dict, Single, Static, Set, List
+from recipe_engine.config import config_item_context, ConfigGroup, BadConf
+from recipe_engine.config import ConfigList, Dict, Single, Static, Set, List
 
 from . import api as gclient_api
 
 
 def BaseConfig(USE_MIRROR=True, GIT_MODE=False, CACHE_DIR=None,
                PATCH_PROJECT=None, BUILDSPEC_VERSION=None,
                **_kwargs):
   deps = '.DEPS.git' if GIT_MODE else 'DEPS'
   cache_dir = str(CACHE_DIR) if GIT_MODE and CACHE_DIR else None
   return ConfigGroup(
@@ skipping 482 matching lines @@
       'buildspec/build/')
   soln.custom_vars['svn_url'] = 'svn://svn-mirror.golo.chromium.org'
   soln.custom_deps = {}
 
 @config_ctx()
 def catapult(c):
   soln = c.solutions.add()
   soln.name = 'catapult'
   soln.url = ('https://chromium.googlesource.com/external/github.com/'
               'catapult-project/catapult.git')