GitLab

Improves speed of page load stress test from 146 seconds to 43 seconds.

Also add logging for accessibility page load speed.

Bug: 976849
Change-Id: I51d2833366b7b54b2abb9fde40811d29ef287aef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1675917
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Commit-Queue: Nektarios Paisios <nektar@chromium.org>
Reviewed-by: Nektarios Paisios <nektar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672315}