Move recipe engine to third_party/recipe_engine.

third_party/recipe_engine/expect_tests/util.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 inspect
 
 EXPECT_TESTS_COVER_FUNCTION = 'EXPECT_TESTS_COVER_FUNCTION'
 
 def covers(coverage_path_function):
   """Allows annotation of a Test generator function with a function that will
   return a list of coverage patterns which should be enabled during the use of
   the Test generator function.
   """
   def _decorator(func):
     setattr(func, EXPECT_TESTS_COVER_FUNCTION, coverage_path_function)
     return func
   return _decorator
 
 
 def get_cover_list(test_gen_function):
   """Given a Test generator, return the list of coverage globs that should
   be included while executing the Test generator."""
   return getattr(test_gen_function, EXPECT_TESTS_COVER_FUNCTION,
                  lambda: [inspect.getabsfile(test_gen_function)])()