RFR: 8305060: G1: Refactor G1ScanHRForRegionClosure::scan_heap_roots [v2]

[Ivan Walulya]

On Tue, 11 Apr 2023 09:57:44 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Simple refactoring to separate out dirty-cards iteration logic from dirty-cards processing.
>> 
>> Test: tier1-6
>
> Albert Mingkun Yang has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:
> 
>  - review
>  - g1-scan-card

Marked as reviewed by iwalulya (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/13205#pullrequestreview-1387554723