Sync m_lastRemainingAllocationSize on promptly freeing objects.

Sync m_lastRemainingAllocationSize on promptly freeing objects.

A heap's m_lastRemainingAllocationSize field is used to limit updating
of heap allocated object size tracking. Upon promptly freeing objects,
make sure it is synchronized so as to it avoid deviating across multiple
such operations.

R=haraken
BUG=534423
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=202634

[sof, 2015-09-22 10:11:24]

sigbjornf@opera.com changed reviewers:
+ oilpan-reviews@chromium.org

[sof, 2015-09-22 10:11:24]

please take a look.

[haraken, 2015-09-22 11:22:44]

Thanks for the fix! LGTM

[sof, 2015-09-22 12:03:10]

On 2015/09/22 11:22:44, haraken wrote:
> Thanks for the fix! LGTM

Thanks - thinking this one through more carefully while taking a walk, I don't
think the sync'ing of recorded size was general enough now. Updated, along with
a comment. Please double check I got the 'polarity' of these updates right :)

[haraken, 2015-09-22 14:40:34]

On 2015/09/22 12:03:10, sof wrote:
> On 2015/09/22 11:22:44, haraken wrote:
> > Thanks for the fix! LGTM
> 
> Thanks - thinking this one through more carefully while taking a walk, I don't
> think the sync'ing of recorded size was general enough now. Updated, along
with
> a comment. Please double check I got the 'polarity' of these updates right :)

Still LGTM

[sof, 2015-09-22 15:34:59]

The CQ bit was checked by sigbjornf@opera.com

[commit-bot: I haz the power, 2015-09-22 15:35:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1360763002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1360763002/40001

[commit-bot: I haz the power, 2015-09-22 15:40:40]

Committed patchset #3 (id:40001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=202634