Include system time in Mac ThreadTicks.

Include system time in Mac ThreadTicks.

Currently Mac ComputeThreadTicks doesn't only use user time, this patch includes
system time in order to get more accurate CPU time.

BUG=608936
Committed: https://crrev.com/89c5c64c72a737a52426df0f29146fb530b9129c
Cr-Commit-Position: refs/heads/master@{#391717}

[lpy, 2016-05-04 20:26:27]

lpy@chromium.org changed reviewers:
+ fmeawad@chromium.org

[lpy, 2016-05-04 20:26:27]

PTAL.

[fmeawad, 2016-05-04 20:32:26]

lgtm

[lpy, 2016-05-04 20:55:42]

lpy@chromium.org changed reviewers:
+ brettw@chromium.org

[lpy, 2016-05-04 20:55:43]

Thanks.
+brettw for review.
PTAL.

[brettw, 2016-05-04 23:45:31]

lgtm

[lpy, 2016-05-04 23:49:03]

The CQ bit was checked by lpy@chromium.org

[commit-bot: I haz the power, 2016-05-04 23:49:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1946303003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1946303003/1

[commit-bot: I haz the power, 2016-05-05 00:37:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-05 00:39:41]

Description was changed from

==========
Include system time in Mac ThreadTicks.

Currently Mac ComputeThreadTicks doesn't only use user time, this patch includes
system time in order to get more accurate CPU time.

BUG=608936
==========

to

==========
Include system time in Mac ThreadTicks.

Currently Mac ComputeThreadTicks doesn't only use user time, this patch includes
system time in order to get more accurate CPU time.

BUG=608936

Committed: https://crrev.com/89c5c64c72a737a52426df0f29146fb530b9129c
Cr-Commit-Position: refs/heads/master@{#391717}
==========

[commit-bot: I haz the power, 2016-05-05 00:39:42]

Patchset 1 (id:??) landed as
https://crrev.com/89c5c64c72a737a52426df0f29146fb530b9129c
Cr-Commit-Position: refs/heads/master@{#391717}