[8u backport] Request for review: 8133193: Memory leak in G1 because G1RootProcessor doesn't have desctructor

[Mikael Gerdin]

Hi all,

Please review the backport of 8133193.
The backport didn't apply cleanly due to some changes in the surrounding 
code.

Webrev: http://cr.openjdk.java.net/~mgerdin/8133193_8u/webrev/
Bug: https://bugs.openjdk.java.net/browse/JDK-8133193

JDK 9 Webrev: http://cr.openjdk.java.net/~david/JDK-8133193/webrev.00
JDK 9 Review Thread: 
http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2015-August/014387.html

I also created a unified diff of the different changesets at
http://cr.openjdk.java.net/~mgerdin/8133193_8u/diffdiff

Thanks
/Mikael