Add ARC contents filesystem type

Add ARC contents filesystem type

This filesystem type will be used to support ARC contents with externalfile: URL.
Chrome will be able to use externalfile: URLs to access ARC contents.

BUG=654684
Committed: https://crrev.com/bc8994de1b388e468d8b1240d6b150d313fd84d9
Cr-Commit-Position: refs/heads/master@{#424666}

[hashimoto, 2016-10-11 07:42:53]

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

[commit-bot: I haz the power, 2016-10-11 07:43:03]

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

[hashimoto, 2016-10-11 08:24:54]

hashimoto@chromium.org changed reviewers:
+ tzik@chromium.org

[commit-bot: I haz the power, 2016-10-11 08:38:22]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-11 08:38:23]

Dry run: This issue passed the CQ dry run.

[tzik, 2016-10-12 03:38:51]

lgtm

[hashimoto, 2016-10-12 04:20:00]

The CQ bit was checked by hashimoto@chromium.org

[commit-bot: I haz the power, 2016-10-12 04:20:22]

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, 2016-10-12 04:26:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-12 04:29:45]

Description was changed from

==========
Add ARC contents filesystem type

This filesystem type will be used to support ARC contents with externalfile:
URL.
Chrome will be able to use externalfile: URLs to access ARC contents.

BUG=654684
==========

to

==========
Add ARC contents filesystem type

This filesystem type will be used to support ARC contents with externalfile:
URL.
Chrome will be able to use externalfile: URLs to access ARC contents.

BUG=654684

Committed: https://crrev.com/bc8994de1b388e468d8b1240d6b150d313fd84d9
Cr-Commit-Position: refs/heads/master@{#424666}
==========

[commit-bot: I haz the power, 2016-10-12 04:29:46]

Patchset 1 (id:??) landed as
https://crrev.com/bc8994de1b388e468d8b1240d6b150d313fd84d9
Cr-Commit-Position: refs/heads/master@{#424666}