Remove two notification browsertests related to infobars.

Remove two notification browsertests related to infobars.

There's no special logic for this behavior in the Notifications
implementations that's not covered elsewhere. Given that the test
was timing out as well, let's remove them.

BUG=168976
Committed: https://crrev.com/a6dabae22b27c4dd8ad9daaa1d360f8bef7948b4
Cr-Commit-Position: refs/heads/master@{#329397}

[Peter Beverloo, 2015-05-11 18:11:11]

peter@chromium.org changed reviewers:
+ stevenjb@chromium.org

[Peter Beverloo, 2015-05-11 18:11:12]

+stevenjb

[stevenjb, 2015-05-11 23:53:27]

lgtm

[Peter Beverloo, 2015-05-12 13:17:03]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2015-05-12 13:17:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1136543004/1

[commit-bot: I haz the power, 2015-05-12 13:21:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-12 13:22:11]

Patchset 1 (id:??) landed as
https://crrev.com/a6dabae22b27c4dd8ad9daaa1d360f8bef7948b4
Cr-Commit-Position: refs/heads/master@{#329397}