Review request: Clean up BarrierSet contructors and destructors

[Jesper Wilhelmsson]

Looks good.
I can sponsor this change.
/Jesper

Joseph Provino skrev den 23/1/15 22:53:
> Can I get reviews for this small change?
>
> I also need a sponsor to push the change.
>
> Webrev and bug report are here:
>
> http://cr.openjdk.java.net/~jprovino/8064947/webrev.01
>
> https://bugs.openjdk.java.net/browse/JDK-8064947
>
> thanks.
>
> joe
>