Adds ability to filter the set of tests that are run by a bot

scripts/slave/recipe_modules/json/api.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 functools
 import collections
 import contextlib
 import json
 
 from cStringIO import StringIO
@@ skipping 29 matching lines @@
   to a step's cmd list, will be replaced by annotated_run with the path to a
   temporary file (e.g. /tmp/tmp4lp1qM) which will exist only for the duration of
   the step. If the script requires a flag (e.g. --output-json /path/to/file),
   you must supply that flag yourself in the cmd list.
 
   This placeholder can be optionally added when you use the Steps.step()
   method in this module.
 
   FIXME
   After the termination of the step, this file is expected to contain a valid
-  JSON document, which will be set as the json_output for that step in the
+  JSON document, which will be set as the json.output for that step in the
   step_history OrderedDict passed to your recipe generator.
   """
   def __init__(self, api, add_json_log):
     self.raw = api.m.raw_io.output('.json')
     self.add_json_log = add_json_log
     super(JsonOutputPlaceholder, self).__init__()
 
   @property
   def backing_file(self):
     return self.raw.backing_file
@@ skipping 100 matching lines @@
 
     It's vastly preferable to have your recipe only pass the bare minimum
     of arguments to steps. Passing property objects obscures the data that
     the script actually consumes from the property object.
     """
     prop_str = self.dumps(dict(self.m.properties))
     return [
       '--factory-properties', prop_str,
       '--build-properties', prop_str
     ]