Remove abarth from mime_sniffer OWNERS

Remove abarth from mime_sniffer OWNERS

Add some new owners to make sure it gets some security attention

BUG=none
TBR=cbentzel (already reviewed)

Committed: https://crrev.com/718df167c44192dfec4661940d898831236bc41e
Cr-Commit-Position: refs/heads/master@{#325378}

[Ryan Sleevi, 2015-04-16 01:58:23]

rsleevi@chromium.org changed reviewers:
+ cbentzel@chromium.org

[Ryan Sleevi, 2015-04-16 01:58:23]

TBR=cbentzel

This is what was discussed on https://codereview.chromium.org/1023673013/, just
picking it up so it lands.

[Ryan Sleevi, 2015-04-16 01:58:52]

The CQ bit was checked by rsleevi@chromium.org

[commit-bot: I haz the power, 2015-04-16 01:59:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1090643003/1

[commit-bot: I haz the power, 2015-04-16 02:24:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-16 02:25:04]

Patchset 1 (id:??) landed as
https://crrev.com/718df167c44192dfec4661940d898831236bc41e
Cr-Commit-Position: refs/heads/master@{#325378}

[mmenke, 2015-10-27 15:35:32]

Not opposed to this change, but a heads up would have been welcome - was just
about to direct a newly filed mime-sniffing bug report to abarth.  It's entirely
possible that there was one, and I've since forgotten about it.