GitLab

Port tests for the shared JS resources migrated to modules in
https://crrev.com/c/1682889.

Note: Tests only run if optimize_webui is false, since these
resources only exist in this case.

Bug: 965770
Change-Id: Ic98c7fcf47149a96a21311fbc52cc8192cc60bf1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1716947
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680605}