[Reland] Implement CPU time for OS X and POSIX.

[Reland] Implement CPU time for OS X and POSIX.

V8 tracing controller uses 2 clocks: wall clock and cpu clock. This patch
implements CPU time for OS X and POSIX to provide more accurate
accounting of CPU time used by each thread.

BUG=v8:4984
LOG=n

Committed: https://crrev.com/efa27fb25e1fa5b8465f4af710086b73b0cba660
Cr-Commit-Position: refs/heads/master@{#36213}

[lpy, 2016-05-11 21:19:48]

lpy@chromium.org changed reviewers:
+ bmeurer@chromium.org, fmeawad@chromium.org, jochen@chromium.org,
rsesek@chromium.org

[lpy, 2016-05-11 21:19:55]

PTAL. This is a reland of the CPU time patch.

[lpy, 2016-05-11 21:21:31]

Description was changed from

==========
Implement CPU time for OS X and POSIX.

V8 tracing controller uses 2 clocks: wall clock and cpu clock. This patch
implements CPU time for OS X and POSIX to provide more accurate
accounting of CPU time used by each thread.

BUG=v8:4984
LOG=n
==========

to

==========
[Reland] Implement CPU time for OS X and POSIX.

V8 tracing controller uses 2 clocks: wall clock and cpu clock. This patch
implements CPU time for OS X and POSIX to provide more accurate
accounting of CPU time used by each thread.

BUG=v8:4984
LOG=n
==========

[Benedikt Meurer, 2016-05-12 04:15:43]

LGTM.

[lpy, 2016-05-12 15:32:19]

The CQ bit was checked by lpy@chromium.org

[commit-bot: I haz the power, 2016-05-12 15:32:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1966183003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1966183003/1

[commit-bot: I haz the power, 2016-05-12 15:34:09]

Description was changed from

==========
[Reland] Implement CPU time for OS X and POSIX.

V8 tracing controller uses 2 clocks: wall clock and cpu clock. This patch
implements CPU time for OS X and POSIX to provide more accurate
accounting of CPU time used by each thread.

BUG=v8:4984
LOG=n
==========

to

==========
[Reland] Implement CPU time for OS X and POSIX.

V8 tracing controller uses 2 clocks: wall clock and cpu clock. This patch
implements CPU time for OS X and POSIX to provide more accurate
accounting of CPU time used by each thread.

BUG=v8:4984
LOG=n
==========

[commit-bot: I haz the power, 2016-05-12 15:34:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-12 15:35:45]

Description was changed from

==========
[Reland] Implement CPU time for OS X and POSIX.

V8 tracing controller uses 2 clocks: wall clock and cpu clock. This patch
implements CPU time for OS X and POSIX to provide more accurate
accounting of CPU time used by each thread.

BUG=v8:4984
LOG=n
==========

to

==========
[Reland] Implement CPU time for OS X and POSIX.

V8 tracing controller uses 2 clocks: wall clock and cpu clock. This patch
implements CPU time for OS X and POSIX to provide more accurate
accounting of CPU time used by each thread.

BUG=v8:4984
LOG=n

Committed: https://crrev.com/efa27fb25e1fa5b8465f4af710086b73b0cba660
Cr-Commit-Position: refs/heads/master@{#36213}
==========

[commit-bot: I haz the power, 2016-05-12 15:35:46]

Patchset 1 (id:??) landed as
https://crrev.com/efa27fb25e1fa5b8465f4af710086b73b0cba660
Cr-Commit-Position: refs/heads/master@{#36213}

[Michael Hablich, 2016-05-13 07:07:59]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1977753002/ by hablich@chromium.org.

The reason for reverting is: Blocks roll:
https://codereview.chromium.org/1972303002/.