Worker: Clean up tests for module loading on dedicated workers

Bug: 680046
Change-Id: I7b58fdf26bb272c3a99cd35089387adcc9be62db
Reviewed-on: https://chromium-review.googlesource.com/1072216
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562187}
4 files changed