[Sheriff] Disable VirtualTimeCrossProcessNavigation on Linux

TBR=eseckler@chromium.org

Bug: 930717
Change-Id: Id59243d337c0b2c1295155d7a393998eeb6e473c
Reviewed-on: https://chromium-review.googlesource.com/c/1463447
Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#630784}
1 file changed