GitLab

Split slow test into 3 to hopefully avoid timeouts.

Bug: 1135410
Change-Id: I4612e8b13740665bdf994ef17d7dc2fb4ab623d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2450139
Commit-Queue: Fergus Dall <sidereal@google.com>
Reviewed-by: Fergus Dall <sidereal@google.com>
Cr-Commit-Position: refs/heads/master@{#814485}