media.tough_video_cases_tbmv2 failing on chromium.perf/Mac Retina Perf

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


Charlie, feel free to dupe.
https://luci-logdog.appspot.com/v/?s=chrome%2Fbb%2Fchromium.perf%2FMac_Retina_Perf%2F966%2F%2B%2Frecipes%2Fsteps%2Fmedia.tough_video_cases_tbmv2_on_Intel_GPU_on_Mac_on_Mac-10.11%2F0%2Fstdout
[ RUN      ] video.html?src=crowd.ogg&type=audio
(INFO) 2017-08-03 05:58:26,807 chrome_tracing_agent._CreateTraceConfigFile:286  Trace config file string: {"trace_config": {"included_categories": ["toplevel", "rail", "blink.console", "disabled-by-default-memory-infra"], "memory_dump_config": {"triggers": []}, "record_mode": "record-as-much-as-possible"}}
(INFO) 2017-08-03 05:58:26,809 cloud_storage._GetLocked:339  Downloading gs://chromium-telemetry/binary_dependencies/battor/battor_agent_binary_2d1610374495130d8eefc731f3f38be63bb21f2e to /b/s/w/ir/third_party/catapult/common/battor/bin/darwin/x86_64/battor_agent
(ERROR) 2017-08-03 05:59:07,263 battor_wrapper._FlashBattOr:175  Git hash returned from BattOr was not as expected: [0803/055907.263213:FATAL:battor_agent_bin.cc(91)] Fatal error when communicating with the BattOr: TOO MANY COMMAND RETRIES
Traceback (most recent call last):
  File "/b/s/w/ir/third_party/catapult/common/battor/battor/battor_wrapper.py", line 162, in _FlashBattOr
    device_git_hash = self.GetFirmwareGitHash()
  File "/b/s/w/ir/third_party/catapult/common/battor/battor/battor_wrapper.py", line 392, in GetFirmwareGitHash
    int(self._git_hash, 16)
ValueError: invalid literal for int() with base 16: '[0803/055907.263213:FATAL:battor_agent_bin.cc(91)] Fatal error when communicating with the BattOr: TOO MANY COMMAND RETRIES'
(WARNING) 2017-08-03 05:59:07,265 shared_page_state.DumpStateUponFailure:140  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 97, in _RunStoryAndProcessErrorIfNeeded
    test.WillRunStory(state.platform)
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/web_perf/timeline_based_measurement.py", line 280, in WillRunStory
    platform.tracing_controller.StartTracing(self._tbm_options.config)
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/core/tracing_controller.py", line 43, in StartTracing
    self._tracing_controller_backend.StartTracing(tracing_config, timeout)
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/internal/platform/tracing_controller_backend.py", line 91, in StartTracing
    started = agent.StartAgentTracing(config, timeout)
  File "/b/s/w/ir/third_party/catapult/telemetry/telemetry/internal/platform/tracing_agent/battor_tracing_agent.py", line 73, in StartAgentTracing
    self._battor.StartTracing()
  File "/b/s/w/ir/third_party/catapult/common/battor/battor/battor_wrapper.py", line 233, in StartTracing
    self._FlashBattOr()
  File "/b/s/w/ir/third_party/catapult/common/battor/battor/battor_wrapper.py", line 176, in _FlashBattOr
    self.StopShell()
  File "/b/s/w/ir/third_party/catapult/common/battor/battor/battor_wrapper.py", line 221, in StopShell
    self._SendBattOrCommand(self._EXIT_CMD, check_return=False)
  File "/b/s/w/ir/third_party/catapult/common/battor/battor/battor_wrapper.py", line 345, in _SendBattOrCommand
    status = self._SendBattOrCommandImpl(cmd)
  File "/b/s/w/ir/third_party/catapult/common/battor/battor/battor_wrapper.py", line 340, in _SendBattOrCommandImpl
    self._battor_shell.stdin.write('%s\n' % cmd)
IOError: [Errno 32] Broken pipe