GitLab

In an effort to better share test infrastructure, the first step is to
move the currently shared files into a shared directory.

AX-Relnotes: n/a.
Bug: 1078119
Change-Id: I68240eea961dd6ca733cca483332dbd6caaa230d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2209673
Commit-Queue: Anastasia Helfinstein <anastasi@google.com>
Reviewed-by: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772050}