RFR (S): 8248322: G1: Refactor full collection sizing code

[Kim Barrett]

> On Jun 26, 2020, at 10:30 AM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
> 
> Hi all,
> 
>  can I have reviews for this small refactoring changes that moves some heap sizing policy related code into a the "right" place (into the heap sizing policy class), and refactors it a bit.
> 
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8248322
> Webrev:
> http://cr.openjdk.java.net/~tschatzl/8248322/webrev/
> Testing:
> tier1
> 
> Thanks,
>  Thomas

Looks good.