
Clarify that there is no need to use `testing/xvfb.py` to start `run_web_tests.py` on Linux. Change-Id: Ic589e5b74cfb208995c3bbbf3b5dc6810df38bfb Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2555262 Commit-Queue: Robert Ma <robertma@chromium.org> Commit-Queue: Marijn Kruisselbrink <mek@chromium.org> Auto-Submit: Robert Ma <robertma@chromium.org> Reviewed-by: Marijn Kruisselbrink <mek@chromium.org> Cr-Commit-Position: refs/heads/master@{#830287}