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: Ia45584f59617165b3d230d551351ea51f3385add
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1703424
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680135}