Request for review (S): 7130974 G1: Remove G1ParCopyHelper

[Bengt Rutisson]

Hi all,

Could I have a couple of reviews of this small code clean up?

http://cr.openjdk.java.net/~brutisso/7130974/webrev.00/

Using templates it is possible to get rid of the extra inheritance level 
introduced by G1ParCopyHelper. This also removes a dependency between 
G1ParCopyHelper and G1ParCopyClosure regarding how the _scanner field is 
initialized.

Bug report:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7130974

Thanks,
Bengt