GitLab

Enable re-use of these helpers across different test suites, by putting
them in their own header & cc.

Bug: 893229
Change-Id: I1d239baf708226d08a25a0aa741e8c5f6d0cf1a8
Reviewed-on: https://chromium-review.googlesource.com/c/1334559
Commit-Queue: Wez <wez@chromium.org>
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611178}