Better fix for flaky LitePagesTimeout test

Figured out the problem and the best way to address it. Comments
document my reasoning.

Bug: 874150
Change-Id: Iba4b95fd615137d08836c98ec89bcb36db39327b
Reviewed-on: https://chromium-review.googlesource.com/c/1348549
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Robert Ogden <robertogden@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610488}
1 file changed