RFR (XXS): 8155811: Remove HeapRegionRemSet::_coarse_dirty flag

[Thomas Schatzl]

Hi Jon,

On Mon, 2016-05-02 at 09:26 -0700, Jon Masamitsu wrote:
> Looks good.
> 
> Jon
> 
> PS.  I agree that it can be pushed without the 24hour
> wait.

 already pushed with you added as reviewer :)

Thanks for the review,
  Thomas