RFR: 8139890: Refactor self forwarding pointer removal task in G1

[Thomas Schatzl]

Hi,

On Tue, 2015-11-10 at 12:08 +0100, Erik Helin wrote:
> Hi all,
> 
> this small patch refactors how G1ParRemoveSelfForwardPtrsTask visits
> the regions that need self-fowarding pointers removed. An new method,
> apply_to_regions, is introduced, which makes it a bit easier to
> eventually use G1ParRemoveSelfForwardPtrsTask to remove self-fowarding
> pointers not only from the collection set.
> 
> Enhancement:
> https://bugs.openjdk.java.net/browse/JDK-8139890
> 
> Webrev:
> http://cr.openjdk.java.net/~ehelin/8139890/webrev.00/
> 

  looks good.

Thomas