Update links to testharness.js to point to new location.

Update links to testharness.js to point to new location.

After moving testharness.js to be part of web-platform-tests its
documentation is no longer available at the old location.

BUG=None

Review-Url: https://codereview.chromium.org/2858043002
Cr-Commit-Position: refs/heads/master@{#469086}
Committed: https://chromium.googlesource.com/chromium/src/+/b330e3186158abe3d235f88316dceb318ca5bd2c

[Marijn Kruisselbrink, 2017-05-03 19:27:26]

mek@chromium.org changed reviewers:
+ pwnall@chromium.org

[pwnall, 2017-05-03 19:29:39]

LGTM

Thank you very much for fixing this!

[Marijn Kruisselbrink, 2017-05-03 19:30:56]

The CQ bit was checked by mek@chromium.org

[commit-bot: I haz the power, 2017-05-03 19:31:34]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-03 19:56:25]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493839856404030, "parent_rev":
"fd8809b68f9bbd6ba708e34c054216d26a21c3f2", "commit_rev":
"b330e3186158abe3d235f88316dceb318ca5bd2c"}

[commit-bot: I haz the power, 2017-05-03 19:56:38]

Description was changed from

==========
Update links to testharness.js to point to new location.

After moving testharness.js to be part of web-platform-tests its
documentation is no longer available at the old location.

BUG=None
==========

to

==========
Update links to testharness.js to point to new location.

After moving testharness.js to be part of web-platform-tests its
documentation is no longer available at the old location.

BUG=None

Review-Url: https://codereview.chromium.org/2858043002
Cr-Commit-Position: refs/heads/master@{#469086}
Committed:
https://chromium.googlesource.com/chromium/src/+/b330e3186158abe3d235f88316dc...
==========

[commit-bot: I haz the power, 2017-05-03 19:56:38]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/b330e3186158abe3d235f88316dc...