Move recipe engine to third_party/recipe_engine.

scripts/slave/recipe_modules/gpu/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.
 
-from slave import recipe_test_api
+from recipe_engine import recipe_test_api
 
 import common
 
 class GpuTestApi(recipe_test_api.RecipeTestApi):
   @property
   def dummy_swarm_hashes(self):
     return dict(
       (target, '[dummy hash for %s]' % target)
         for target in common.GPU_ISOLATES)
 
@@ skipping 32 matching lines @@
           # A few random targets from the Chrome build to try to
           # confuse the recipe
           'All', 'app_list_demo', 'app_list_unittests', 'app_shell',
           'chrome_initial') +
           # The names of our isolates (even though telemetry_gpu_test
           # won't actually be reported by analyze)
           common.GPU_ISOLATES ),
         'status': 'Found dependency',
         'targets': [u'%s_run' % test for test in common.GPU_ISOLATES],
         })