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This test converts the two web tests with W3C testharness.js, which is a
more preferred test framework. It's also a preparation for
crrev.com/c/2451598

Bug: 1087854
Change-Id: Ibd58fe188c75258f66568f93a41ea4b994915b6c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2453491
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814344}