Fix bug with runtime-call-stats timers

Fix bug with runtime-call-stats timers

RuntimeCallTimers were not properly stopped and this made a DCHECK
in the Debug version fail.

R=cbruni@chromium.org
BUG=
LOG=N

Committed: https://crrev.com/a156a05101bb8822d12c5f21fbea2f00854ed165
Cr-Commit-Position: refs/heads/master@{#36097}

[Camillo Bruni, 2016-05-09 07:03:02]

lgtm

[nickie, 2016-05-09 07:31:57]

The CQ bit was checked by nikolaos@chromium.org

[commit-bot: I haz the power, 2016-05-09 07:32:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1955943002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1955943002/1

[commit-bot: I haz the power, 2016-05-09 08:04:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-09 08:04:59]

Description was changed from

==========
Fix bug with runtime-call-stats timers

RuntimeCallTimers were not properly stopped and this made a DCHECK
in the Debug version fail.

R=cbruni@chromium.org
BUG=
LOG=N
==========

to

==========
Fix bug with runtime-call-stats timers

RuntimeCallTimers were not properly stopped and this made a DCHECK
in the Debug version fail.

R=cbruni@chromium.org
BUG=
LOG=N

Committed: https://crrev.com/a156a05101bb8822d12c5f21fbea2f00854ed165
Cr-Commit-Position: refs/heads/master@{#36097}
==========

[commit-bot: I haz the power, 2016-05-09 08:04:59]

Patchset 1 (id:??) landed as
https://crrev.com/a156a05101bb8822d12c5f21fbea2f00854ed165
Cr-Commit-Position: refs/heads/master@{#36097}