Similar issue as  crbug.com/742475 . Story should be disabled util a fix is in place.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6e193dc398ae5a0b925d2d2ca89100c0f30e5df5

commit 6e193dc398ae5a0b925d2d2ca89100c0f30e5df5
Author: Vovo Yang <vovoy@google.com>
Date: Wed Aug 02 09:51:48 2017

[tools/perf] Disable tab_switching.typical_25 on Mac

Bug:  747026 
Change-Id: If3154377583d9617516d6c2f4596d1da35272b97
Reviewed-on: https://chromium-review.googlesource.com/595352
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Commit-Queue: Vovo Yang <vovoy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491325}
[modify] https://crrev.com/6e193dc398ae5a0b925d2d2ca89100c0f30e5df5/tools/perf/benchmarks/tab_switching.py

Should this be duped to  issue 742475 ? Root cause is the same, right?

Friendly ping to get an update from vovoy@ on this as per C#4.