Remove JSON summaries from chromium trybot recipe output.

scripts/slave/recipes/chromium_trybot.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.
 
 DEPS = [
   'chromium',
   'gclient',
   'itertools',
   'json',
   'path',
@@ skipping 99 matching lines @@
     def run(self, suffix):
       def followup_fn(step_result):
         r = step_result.json.gtest_results
         p = step_result.presentation
 
         if r.valid:
           p.step_text += api.test_utils.format_step_text([
               ['failures:', r.failures]
           ])
 
-      args = [api.json.gtest_results()]
+      args = [api.json.gtest_results(add_json_log=False)]
 
       if suffix == 'without patch':
         args.append(api.chromium.test_launcher_filter(
                         self.failures('with patch')))
 
       return api.chromium.runtests(self.name,
                                    args,
                                    xvfb=True,
                                    name=self._step_name(suffix),
                                    parallel=True,
@@ skipping 255 matching lines @@
                                                    api.json.output(None))
   yield invalid_json_without_patch_test
 
   for step in ('gclient revert', 'gclient runhooks', 'compile'):
     yield (
       api.test(step.replace(' ', '_') + '_failure') +
       props() +
       api.platform.name('win') +
       api.step_data(step, retcode=1)
     )