Revert of Cross-repo recipe package system.

scripts/slave/recipe_modules/swarming/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.
 
 import datetime
 import functools
 
-from recipe_engine.types import freeze
+from infra.libs.infra_types import freeze
 from recipe_engine import recipe_api
 
 
 # Minimally supported version of swarming.py script (reported by --version).
 MINIMAL_SWARMING_VERSION = (0, 4, 10)
 
 
 def parse_time(value):
   """Converts serialized time from the API to datetime.datetime."""
   # When microseconds are 0, the '.123456' suffix is elided. This means the
@@ skipping 808 matching lines @@
 
   def get_shard_view_url(self, index):
     """Returns URL of HTML page with shard details or None if not available.
 
     Works only after the task has been successfully triggered.
     """
     if self._trigger_output and self._trigger_output.get('tasks'):
       for shard_dict in self._trigger_output['tasks'].itervalues():
         if shard_dict['shard_index'] == index:
           return shard_dict['view_url']