Filed by sheriff-o-matic@appspot.gserviceaccount.com on behalf of charliea@google.com

media.mobile/video.html?src=tulip2.vp9.webm_Regular-3G in media.mobile failing on multiple builders

Builders failed on: 
- Android Nexus5 Perf: 
  https://ci.chromium.org/buildbot/chromium.perf/Android%20Nexus5%20Perf
- Android Nexus5X Perf: 
  https://ci.chromium.org/buildbot/chromium.perf/Android%20Nexus5X%20Perf
- Android One Perf: 
  https://ci.chromium.org/buildbot/chromium.perf/Android%20One%20Perf

Excerpt from logs:

(ERROR) 2018-06-29 17:48:23,093 story_runner.ProcessError:100  Handleable error
Traceback (most recent call last):
  File "/b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/story_runner.py", line 125, in _RunStoryAndProcessErrorIfNeeded
    state.RunStory(results)
  File "/b/swarming/w/ir/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/swarming/w/ir/third_party/catapult/telemetry/telemetry/page/shared_page_state.py", line 310, in RunStory
    self._current_page.Run(self)
  File "/b/swarming/w/ir/third_party/catapult/telemetry/telemetry/page/__init__.py", line 99, in Run
    self.RunPageInteractions(action_runner)
  File "/b/swarming/w/ir/tools/perf/page_sets/media_cases.py", line 100, in RunPageInteractions
    ended_event_timeout_in_seconds=60)
  File "/b/swarming/w/ir/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/actions/action_runner.py", line 720, in PlayMedia
    ended_event_timeout_in_seconds=ended_event_timeout_in_seconds))
  File "/b/swarming/w/ir/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/actions/action_runner.py", line 62, in _RunAction
    action.RunAction(self._tab)
  File "/b/swarming/w/ir/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/actions/play.py", line 48, in RunAction
    self._ended_event_timeout_in_seconds)
  File "/b/swarming/w/ir/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/actions/media_action.py", line 33, in WaitForEvent
    timeout=timeout_in_seconds)
  File "/b/swarming/w/ir/third_party/catapult/common/py_utils/py_utils/__init__.py", line 148, in WaitFor
    (timeout, GetConditionString()))
TimeoutException: Timed out while waiting 60s for lambda: self.HasEventCompletedOrError(tab, selector, event_name),.