v8.mobile_infinite_scroll_tbmv2 failing on 2 builders

Builders failed on: 
- Android Nexus5 Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus5%20Perf
- Android Nexus7v2 Perf: 
  https://build.chromium.org/p/chromium.perf/builders/Android%20Nexus7v2%20Perf


It looks like the scrolling is getting stuck somehow. See example swarming logs:
https://chromium-swarm.appspot.com/task?id=362f5c74ba6d8910&refresh=10&show_raw=1
https://chromium-swarm.appspot.com/task?id=362e10dd9fe15410&refresh=10&show_raw=1

Example log:
Traceback (most recent call last):
  File "/b/swarming/w/ir/third_party/catapult/telemetry/telemetry/internal/story_runner.py", line 90, 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 296, in RunStory
    self._current_page.Run(self)
  File "/b/swarming/w/ir/third_party/catapult/telemetry/telemetry/page/__init__.py", line 112, in Run
    self.RunPageInteractions(action_runner)
  File "/b/swarming/w/ir/tools/perf/page_sets/infinite_scroll_cases.py", line 51, in RunPageInteractions
    self._Scroll(action_runner, self.SCROLL_DISTANCE, self.SCROLL_STEP)
  File "/b/swarming/w/ir/tools/perf/page_sets/infinite_scroll_cases.py", line 73, in _Scroll
    raise Exception('Scrolling stuck at %d' % remaining)
Exception: Scrolling stuck at 24045