RFR: 8198525: Move _size_policy out of GenCollectorPolicy into GenCollectedHeap

[Stefan Karlsson]

Hi all,

Please review this patch to move the _size_all (AdaptiveSizePolicy) from 
GenCollectorPolicy to GenCollectedHeap.

  http://cr.openjdk.java.net/~stefank/8198525/webrev.01/
  https://bugs.openjdk.java.net/browse/JDK-8198525

This is a step towards the removal of CollectorPolicy:

  https://bugs.openjdk.java.net/browse/JDK-8198505

Thanks,
StefanK