Support official Chrome builders.

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 ast
 import collections
 import contextlib
 import copy
 import itertools
 import json
@@ skipping 164 matching lines @@
       except self.m.step.StepFailure:
         # As part of deapplying patch we call runhooks without the patch.
         self.deapply_patch(update_step)
         raise
     else:
       self.m.chromium.runhooks()
 
   def get_test_spec(self, mastername, buildername):
     bot_config = self._get_bot_config(mastername, buildername)
 
+    # The official builders specify the test spec using a test_spec property in
+    # the bot_config instead of reading it from a file.
+    if 'test_spec' in bot_config:
+      return { buildername: bot_config['test_spec'] }
+
     test_spec_file = bot_config.get('testing', {}).get(
         'test_spec_file', '%s.json' % mastername)
 
     # TODO(phajdan.jr): Bots should have no generators instead.
     if bot_config.get('disable_tests'):
       return {}
     return self.read_test_spec(self.m, test_spec_file)
 
   def _get_master_dict_with_dynamic_tests(
       self, mastername, buildername, test_spec, scripts_compile_targets):
@@ skipping 698 matching lines @@
       result_text = 'MB is enabled for this builder at this revision.'
       log_name = 'Builder MB-ready'
       self.m.step.active_result.presentation.logs[log_name] = [result_text]
       return False
     except (self.m.step.StepFailure, KeyError):
       result_text = 'MB is not enabled for this builder at this revision.'
       log_name = 'Builder NOT MB-ready'
       self.m.step.active_result.presentation.logs[log_name] = [result_text]
       self.m.step.active_result.presentation.status = self.m.step.WARNING
       return True