merge_pr_9881: Reland "Port another set of sticky tests to JS rather than reftests"

This is a reland of 913109149534a732bdb5461d0ba2759f5d2f50f4

Now that the WPT test infra has been pulled from upstream, the hope is
that changing tests from reftest to jsharness won't cause the bots to
fail horribly.

Original change's description:
> Port another set of sticky tests to JS rather than reftests
>
> Change-Id: Idf6dd882d2d50b1ec349f245d76717553ee266b3
> Reviewed-on: https://chromium-review.googlesource.com/882002
> Reviewed-by: Robert Flack <flackr@chromium.org>
> Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#532966}

Bug: 699244
Change-Id: Ib8c16d08f1327765e0bd322a708452373db8581c
Reviewed-on: https://chromium-review.googlesource.com/951662
Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
Reviewed-by: Robert Flack <flackr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541437}