power.idle_platform/IdleStory_120s in power.idle_platform failing on chromium.perf/Mac Retina Perf

Builders failed on: 
- Mac Retina Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Mac%20Retina%20Perf


https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%20Retina%20Perf/builds/1349
https://logs.chromium.org/v/?s=chrome%2Fbb%2Fchromium.perf%2FMac_Retina_Perf%2F1349%2F%2B%2Frecipes%2Fsteps%2Fpower.idle_platform_on_Intel_GPU_on_Mac_on_Mac-10.11%2F0%2Fstdout

[ RUN      ] IdleStory_120s
(CRITICAL) 2017-11-02 07:29:53,498 battor_wrapper.KillBattOrShell:191  BattOr shell was not properly closed. Killing now.
(INFO) 2017-11-02 07:29:53,498 cloud_storage.Insert:377  Uploading /b/s/w/itFMrNIf/tmp7o6hby to gs://chrome-telemetry-output/battor-serial-log-2017-11-02_07-29.txt-33485.txt
View BattOr serial log at https://console.developers.google.com/m/cloudstorage/b/chrome-telemetry-output/o/battor-serial-log-2017-11-02_07-29.txt-33485.txt
(WARNING) 2017-11-02 07:30:06,552 shared_page_state.DumpStateUponFailure:131  Cannot dump browser state: No browser.
Traceback (most recent call last):
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/internal/story_runner.py", line 106, in _RunStoryAndProcessErrorIfNeeded
    test.Measure(state.platform, results)
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/web_perf/timeline_based_measurement.py", line 277, in Measure
    trace_result = platform.tracing_controller.StopTracing()
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/core/tracing_controller.py", line 47, in StopTracing
    return self._tracing_controller_backend.StopTracing()
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/internal/platform/tracing_controller_backend.py", line 140, in StopTracing
    '\n'.join(raised_exception_messages))
TracingException: Exceptions raised when trying to stop tracing:
Traceback (most recent call last):
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/internal/platform/tracing_controller_backend.py", line 118, in StopTracing
    agent.StopAgentTracing()
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/internal/platform/tracing_agent/battor_tracing_agent.py", line 83, in StopAgentTracing
    self._battor.StopTracing()
  File "/b/s/w/ir/third_party/catapult/common/battor/battor/battor_wrapper.py", line 247, in StopTracing
    '%s %s' % (self._STOP_TRACING_CMD, self._trace_results_path))
  File "/b/s/w/ir/third_party/catapult/common/battor/battor/battor_wrapper.py", line 359, in _SendBattOrCommand
    'Outputted: %s' % (cmd, status))
BattOrError: BattOr did not complete command 'StopTracing /b/s/w/itFMrNIf/tmphCkyOD' correctly.
Outputted: [1102/072953.498206:FATAL:battor_agent_bin.cc(100)] Fatal error when communicating with the BattOr: TOO MANY COMMAND RETRIES
Traceback (most recent call last):
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/internal/platform/tracing_controller_backend.py", line 128, in StopTracing
    agent.CollectAgentTraceData(builder)
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/internal/platform/tracing_agent/battor_tracing_agent.py", line 112, in CollectAgentTraceData
    data = self._battor.CollectTraceData(timeout=timeout)
  File "/b/s/w/ir/third_party/catapult/common/battor/battor/battor_wrapper.py", line 262, in CollectTraceData
    self._stop_tracing_time))
BattOrError: No start or stop time detected when collecting BattOr trace.
Start: 1509632591 
 Stop: None
[  FAILED  ] IdleStory_120s (422271 ms)