WPT importer: Fix addition of --cc arguments for test owners.

WPT importer: Fix addition of --cc arguments for test owners.

This is a follow-up fix for a mistake in https://crrev.com/2716083002.

Example of the error caused by that mistake:
https://build.chromium.org/p/chromium.infra.cron/builders/w3c-test-autoroller/builds/7977/steps/update%20wpt/logs/stdio

BUG=684026
Review-Url: https://codereview.chromium.org/2719963002
Cr-Commit-Position: refs/heads/master@{#453321}
Committed: https://chromium.googlesource.com/chromium/src/+/25efc8063d6c3af7ae0c9de24051325a77bfe90b

[qyearsley, 2017-02-27 16:13:48]

qyearsley@chromium.org changed reviewers:
+ tkent@chromium.org

[qyearsley, 2017-02-27 18:53:34]

qyearsley@chromium.org changed reviewers:
+ jeffcarp@chromium.org

[qyearsley, 2017-02-27 18:53:39]

The CQ bit was checked by qyearsley@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-02-27 18:54:11]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[jeffcarp, 2017-02-27 18:59:55]

lgtm

[qyearsley, 2017-02-27 19:00:47]

The CQ bit was checked by qyearsley@chromium.org

[commit-bot: I haz the power, 2017-02-27 19:00:53]

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, 2017-02-27 20:37:01]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1488222047245850, "parent_rev":
"2a5e6e00828ef68ffd416555347aa710a163d3f4", "commit_rev":
"25efc8063d6c3af7ae0c9de24051325a77bfe90b"}

[commit-bot: I haz the power, 2017-02-27 20:38:05]

Description was changed from

==========
WPT importer: Fix addition of --cc arguments for test owners.

This is a follow-up fix for a mistake in https://crrev.com/2716083002.

Example of the error caused by that mistake:
https://build.chromium.org/p/chromium.infra.cron/builders/w3c-test-autoroller...

BUG=684026
==========

to

==========
WPT importer: Fix addition of --cc arguments for test owners.

This is a follow-up fix for a mistake in https://crrev.com/2716083002.

Example of the error caused by that mistake:
https://build.chromium.org/p/chromium.infra.cron/builders/w3c-test-autoroller...

BUG=684026

Review-Url: https://codereview.chromium.org/2719963002
Cr-Commit-Position: refs/heads/master@{#453321}
Committed:
https://chromium.googlesource.com/chromium/src/+/25efc8063d6c3af7ae0c9de24051...
==========

[commit-bot: I haz the power, 2017-02-27 20:38:06]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/25efc8063d6c3af7ae0c9de24051...