swarming: always append task's OS dimension to step name

scripts/slave/recipes/chromium.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 = [
   'adb',
   'amp',
   'bisect_tester',
   'depot_tools/bot_update',
   'chromium',
@@ skipping 541 matching lines @@
       'Linux Tests': {
         'isolated_scripts': [
           {
             'isolate_name': 'telemetry_gpu_unittests',
             'name': 'telemetry_gpu_unittests',
             'swarming': {'can_use_on_swarming_builders': True},
           },
         ],
       },
     })) +
-    api.override_step_data('telemetry_gpu_unittests',
+    api.override_step_data('telemetry_gpu_unittests on Ubuntu-12.04',
         api.test_utils.canned_isolated_script_output(
             passing=True, is_win=False, swarming=True,
             isolated_script_passing=False, valid=True),
         retcode=255)
   )
 
   yield (
     api.test('dynamic_swarmed_passed_with_bad_retcode_isolated_script_test') +
     api.properties.generic(mastername='chromium.linux',
                            buildername='Linux Tests',
                            parent_buildername='Linux Builder') +
     api.properties(swarm_hashes={
       'telemetry_gpu_unittests': 'eeeeeeeeeeeeeeeeeeeeeeeeeeeeee',
     }) +
     api.platform('linux', 64) +
     api.override_step_data('read test spec', api.json.output({
       'Linux Tests': {
         'isolated_scripts': [
           {
             'isolate_name': 'telemetry_gpu_unittests',
             'name': 'telemetry_gpu_unittests',
             'swarming': {'can_use_on_swarming_builders': True},
           },
         ],
       },
     })) +
-    api.override_step_data('telemetry_gpu_unittests',
+    api.override_step_data('telemetry_gpu_unittests on Ubuntu-12.04',
         api.test_utils.canned_isolated_script_output(
             passing=True, is_win=False, swarming=True,
             isolated_script_passing=True, valid=True),
         retcode=255)
   )
 
   yield (
     api.test(
         'dynamic_swarmed_passed_isolated_script_test_with_swarming_failure') +
     api.properties.generic(mastername='chromium.linux',
                            buildername='Linux Tests',
                            parent_buildername='Linux Builder') +
     api.properties(swarm_hashes={
       'telemetry_gpu_unittests': 'eeeeeeeeeeeeeeeeeeeeeeeeeeeeee',
     }) +
     api.platform('linux', 64) +
     api.override_step_data('read test spec', api.json.output({
       'Linux Tests': {
         'isolated_scripts': [
           {
             'isolate_name': 'telemetry_gpu_unittests',
             'name': 'telemetry_gpu_unittests',
             'swarming': {'can_use_on_swarming_builders': True},
           },
         ],
       },
     })) +
-    api.override_step_data('telemetry_gpu_unittests',
+    api.override_step_data('telemetry_gpu_unittests on Ubuntu-12.04',
         api.test_utils.canned_isolated_script_output(
             passing=False, is_win=False, swarming=True,
             swarming_internal_failure=True, isolated_script_passing=True,
             valid=True),
         retcode=255)
   )
 
   yield (
     api.test('dynamic_instrumentation_test') +
     api.properties.generic(mastername='chromium.linux',
@@ skipping 385 matching lines @@
     api.test('chromium_linux_Android_Tests_logcat_upload_timeout') +
     api.properties(
         mastername='chromium.linux',
         buildername='Android Tests',
         slavename='build1-a1',
         buildnumber='77457',
         parent_buildername='Android Builder',
     ) +
     api.override_step_data('gsutil upload', retcode=-2001)
   )