This CL increases tolerance for time measurement variability, from 1% to 5%. This accounts for heavily loaded bots in CI. Bug: webrtc:10553 Change-Id: I014f856f9e358f2871a2df8bc39ab0995fdc971f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/159284 Reviewed-by: Artem Titov <titovartem@webrtc.org> Commit-Queue: Yves Gerey <yvesg@google.com> Cr-Commit-Position: refs/heads/master@{#29765}