Make ChromeOSVersionInfo singleton leaky to avoid startup thread restriction DCHECK

Make ChromeOSVersionInfo singleton leaky to avoid startup thread restriction DCHECK

It doesn't do any interesting work on shutdown. The check was added today with
https://codereview.chromium.org/1904273002/

This is needed to run a target_os="chromeos" build on Linux.

BUG=none
TEST=none

Committed: https://crrev.com/5aa2d8c58b4dbb74437652c32dcdfec5a323db44
Cr-Commit-Position: refs/heads/master@{#406395}

[James Cook, 2016-07-19 21:08:38]

jamescook@chromium.org changed reviewers:
+ pmonette@chromium.org

[James Cook, 2016-07-19 21:08:38]

pmonette, PTAL

[James Cook, 2016-07-19 21:09:35]

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

[Patrick Monette, 2016-07-19 21:09:59]

LGTM

[commit-bot: I haz the power, 2016-07-19 21:10:23]

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

[James Cook, 2016-07-19 21:11:11]

jamescook@chromium.org changed reviewers:
+ danakj@chromium.org

[James Cook, 2016-07-19 21:11:12]

danakj, can I get OWNERS?

[danakj, 2016-07-19 21:16:36]

LGTM

[James Cook, 2016-07-19 21:17:12]

The CQ bit was unchecked by jamescook@chromium.org

[James Cook, 2016-07-19 21:17:25]

The CQ bit was checked by jamescook@chromium.org

[commit-bot: I haz the power, 2016-07-19 21:17:34]

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, 2016-07-19 22:11:43]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-19 22:13:47]

Description was changed from

==========
Make ChromeOSVersionInfo singleton leaky to avoid startup thread restriction
DCHECK

It doesn't do any interesting work on shutdown. The check was added today with
https://codereview.chromium.org/1904273002/

This is needed to run a target_os="chromeos" build on Linux.

BUG=none
TEST=none
==========

to

==========
Make ChromeOSVersionInfo singleton leaky to avoid startup thread restriction
DCHECK

It doesn't do any interesting work on shutdown. The check was added today with
https://codereview.chromium.org/1904273002/

This is needed to run a target_os="chromeos" build on Linux.

BUG=none
TEST=none

Committed: https://crrev.com/5aa2d8c58b4dbb74437652c32dcdfec5a323db44
Cr-Commit-Position: refs/heads/master@{#406395}
==========

[commit-bot: I haz the power, 2016-07-19 22:13:48]

Patchset 1 (id:??) landed as
https://crrev.com/5aa2d8c58b4dbb74437652c32dcdfec5a323db44
Cr-Commit-Position: refs/heads/master@{#406395}