scheduler.tough_scheduling_cases/simple_text_page.html in scheduler.tough_scheduling_cases failing on chromium.perf/Win 7 Intel GPU Perf

Builders failed on: 
- Win 7 Intel GPU Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Win%207%20Intel%20GPU%20Perf


Including stack trace, looks like telemetry can't find something it needs in the results: 

Traceback (most recent call last):
  _RunStoryAndProcessErrorIfNeeded at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\internal\story_runner.py:131
    test.DidRunPage(state.platform)
  traced_function at c:\b\s\w\ir\third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py:75
    return func(*args, **kwargs)
  DidRunPage at c:\b\s\w\ir\tools\perf\measurements\smoothness.py:67
    self._tbm.DidRunStory(platform, self._results)
  DidRunStory at c:\b\s\w\ir\third_party\catapult\telemetry\telemetry\web_perf\timeline_based_measurement.py:309
    results.current_page, trace_result,
AttributeError: 'NoneType' object has no attribute 'current_page'


https://cs.chromium.org/chromium/src/third_party/catapult/telemetry/telemetry/web_perf/timeline_based_measurement.py?l=309