reland #1: Set mac_min_sdk=10.10 on chromium.mac bots

scripts/slave/recipe_modules/chromium_tests/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 contextlib
 import copy
 import json
 
 from infra.libs.infra_types import freeze, thaw
 from recipe_engine import recipe_api
@@ skipping 26 matching lines @@
     bot_config = master_dict.get('builders', {}).get(buildername)
 
     # Get the buildspec version. It can be supplied as a build property or as
     # a recipe config value.
     buildspec_version = (self.m.properties.get('buildspec_version') or
                          bot_config.get('buildspec_version'))
 
     self.m.chromium.set_config(
         bot_config.get('chromium_config'),
         **bot_config.get('chromium_config_kwargs', {}))
+
     # Set GYP_DEFINES explicitly because chromium config constructor does
     # not support that.
     self.m.chromium.c.gyp_env.GYP_DEFINES.update(
         bot_config.get('GYP_DEFINES', {}))
     if bot_config.get('use_isolate'):
       self.m.isolate.set_isolate_environment(self.m.chromium.c)
 
     # WARNING: src-side runtest.py is only tested with chromium CQ builders.
     # Usage not covered by chromium CQ is not supported and can break
     # without notice.
@@ skipping 636 matching lines @@
   def get_compile_targets_for_scripts(self):
     return self.m.python(
         name='get compile targets for scripts',
         script=self.m.path['checkout'].join(
             'testing', 'scripts', 'get_compile_targets.py'),
         args=[
             '--output', self.m.json.output(),
             '--',
         ] + self.get_common_args_for_scripts(),
         step_test_data=lambda: self.m.json.test_api.output({}))