GitLab

- Added tests for scope parameter.
- Added lots of different types and values for inputs.
- Tests which value is set, not just the type of value.
- Fixed assert argument order and fix failure messages.

Explainer (current, but vague):
https://github.com/WICG/badging/blob/master/explainer.md
Spec (out of date):
https://wicg.github.io/badging/

Bug: 987514, 1000968, 1001404, 1001405
Change-Id: I518ff82a81c9a56bd45421cf8b7b16b9855a7ba6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1788966
Commit-Queue: Matt Giuca <mgiuca@chromium.org>
Reviewed-by: Eric Willigers <ericwilligers@chromium.org>
Cr-Commit-Position: refs/heads/master@{#696695}