RFR: Little cleanup

[Zhengyu Gu]

Looks good.

-Zhengyu

On 03/15/2018 10:06 AM, Roman Kennke wrote:
> I noticed we use some ShenandoahHeap::heap() while being in a
> ShenandoahHeap instance method. Probably leftovers from moving code
> around. This cleans it up and replaces it with 'this' instead.
> 
> http://cr.openjdk.java.net/~rkennke/little-cleanup/webrev.00/
> 
> Roman
>