RFR: 8252888: Collapse G1MMUTracker class hierarchy [v2]

[John Tortugo]

On Wed, 23 Sep 2020 07:17:24 GMT, Stefan Johansson <sjohanss at openjdk.org> wrote:

>> I'm currently running some basic testing to make sure everything is fine.
>
> Testing looks good.

@kstefanj - I addressed your feedback. Thanks for reviewing. PTAL when you have some time.

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PR: https://git.openjdk.java.net/jdk/pull/214