[Downloads] Re-add notification namespace

[Downloads] Re-add notification namespace

The namespace accidentally got removed while experimenting with a fix for
notification grouping.

BUG=678694
Review-Url: https://codereview.chromium.org/2619643002
Cr-Commit-Position: refs/heads/master@{#442070}
Committed: https://chromium.googlesource.com/chromium/src/+/4333928031cee6b8ff32d2fcddd45d537f7ea500

[gone, 2017-01-06 21:46:14]

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

[commit-bot: I haz the power, 2017-01-06 21:46:27]

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

[gone, 2017-01-06 21:46:36]

dfalcantara@chromium.org changed reviewers:
+ qinmin@chromium.org

[qinmin, 2017-01-06 21:49:08]

lgtm

[gone, 2017-01-06 22:03:45]

The CQ bit was unchecked by dfalcantara@chromium.org

[gone, 2017-01-06 22:03:45]

The CQ bit was checked by dfalcantara@chromium.org

[commit-bot: I haz the power, 2017-01-06 22:03:50]

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, 2017-01-06 22:16:47]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1483740225325560, "parent_rev":
"4ff362d26a90a400409db755aa389b1b87363da7", "commit_rev":
"4333928031cee6b8ff32d2fcddd45d537f7ea500"}

[commit-bot: I haz the power, 2017-01-06 22:17:17]

Description was changed from

==========
[Downloads] Re-add notification namespace

The namespace accidentally got removed while experimenting with a fix for
notification grouping.

BUG=678694
==========

to

==========
[Downloads] Re-add notification namespace

The namespace accidentally got removed while experimenting with a fix for
notification grouping.

BUG=678694

Review-Url: https://codereview.chromium.org/2619643002
Cr-Commit-Position: refs/heads/master@{#442070}
Committed:
https://chromium.googlesource.com/chromium/src/+/4333928031cee6b8ff32d2fcddd4...
==========

[commit-bot: I haz the power, 2017-01-06 22:17:19]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/4333928031cee6b8ff32d2fcddd4...