Add json test results format support for SwarmingIsolatedScriptTest

scripts/slave/recipe_modules/test_utils/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.
 
 from recipe_engine import recipe_api
 from recipe_engine import util as recipe_util
 
 from .util import GTestResults, TestResults
 
 # TODO(luqui): Destroy this DEPS hack.
@@ skipping 177 matching lines @@
       if new_failures:
         self.m.python.failing_step(step_name, step_text)
       else:
         self.m.python.succeeding_step(step_name, step_text)
     finally:
       if new_failures:
         self.m.tryserver.set_test_failure_tryjob_result()
       elif ignored_failures:
         self.m.step.active_result.presentation.status = self.m.step.WARNING
 
+  def create_results_from_json(self, data):
+    return TestResults(data)
+
   @recipe_util.returns_placeholder
   def test_results(self, add_json_log=True):
     """A placeholder which will expand to '/tmp/file'.
 
     The recipe must provide the expected --json-test-results flag.
 
     The test_results will be an instance of the TestResults class.
     """
     return TestResultsOutputPlaceholder(self, add_json_log)
 
   @recipe_util.returns_placeholder
   def gtest_results(self, add_json_log=True):
     """A placeholder which will expand to
     '--test-launcher-summary-output=/tmp/file'.
 
     Provides the --test-launcher-summary-output flag since --flag=value
     (i.e. a single token in the command line) is the required format.
 
     The test_results will be an instance of the GTestResults class.
     """
     return GTestResultsOutputPlaceholder(self, add_json_log)