arc: Use ARC_GET_INSTANCE_FOR_METHOD for getting file_system instance

arc: Use ARC_GET_INSTANCE_FOR_METHOD for getting file_system instance

This is safer than manually specifying min versions.

BUG=649782
TEST=git try

Review-Url: https://codereview.chromium.org/2616223002
Cr-Commit-Position: refs/heads/master@{#442296}
Committed: https://chromium.googlesource.com/chromium/src/+/1411eb8bc047a30d081180b8c30ccdf5124ddfc5

[Yusuke Sato, 2017-01-07 00:52:15]

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

[commit-bot: I haz the power, 2017-01-07 00:52:41]

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

[Yusuke Sato, 2017-01-07 01:01:01]

yusukes@chromium.org changed reviewers:
+ lhchavez@chromium.org

[Yusuke Sato, 2017-01-07 01:01:02]

PTAL too

[commit-bot: I haz the power, 2017-01-07 01:21:03]

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

[commit-bot: I haz the power, 2017-01-07 01:21:03]

Dry run: This issue passed the CQ dry run.

[Luis Héctor Chávez, 2017-01-09 17:23:57]

lgtm

[Yusuke Sato, 2017-01-09 17:42:42]

The CQ bit was checked by yusukes@chromium.org

[commit-bot: I haz the power, 2017-01-09 17:43:09]

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, 2017-01-09 18:22:17]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1483983762258460, "parent_rev":
"d0c37cba3d84dc551c4d4b98a3dcf23321ed4b17", "commit_rev":
"1411eb8bc047a30d081180b8c30ccdf5124ddfc5"}

[commit-bot: I haz the power, 2017-01-09 18:22:44]

Description was changed from

==========
arc: Use ARC_GET_INSTANCE_FOR_METHOD for getting file_system instance

This is safer than manually specifying min versions.

BUG=649782
TEST=git try
==========

to

==========
arc: Use ARC_GET_INSTANCE_FOR_METHOD for getting file_system instance

This is safer than manually specifying min versions.

BUG=649782
TEST=git try

Review-Url: https://codereview.chromium.org/2616223002
Cr-Commit-Position: refs/heads/master@{#442296}
Committed:
https://chromium.googlesource.com/chromium/src/+/1411eb8bc047a30d081180b8c30c...
==========

[commit-bot: I haz the power, 2017-01-09 18:22:45]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/1411eb8bc047a30d081180b8c30c...