Review request: 8012687: Remove unused is_root checks and closures

[Jon Masamitsu]

Looks good.

Jon

On 4/19/2013 4:46 AM, Stefan Karlsson wrote:
> http://cr.openjdk.java.net/~stefank/8012687/webrev.00/
>
> From bug description:
> There's an unused parameter named is_root that is passed down to a 
> number of MarkSweep/ParOld closures. This enhancement suggests that we 
> remove it and cleanup the trails after it.
>
> thanks,
> StefanK