RFR: 8310311: Serial: move Generation::contribute_scratch to DefNewGeneration [v4]

[Thomas Schatzl]

On Tue, 1 Aug 2023 08:43:52 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Simple cleanup to move a method from base-class to  sub-class.
>> 
>> Test: hotspot_gc
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   const

Marked as reviewed by tschatzl (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/14540#pullrequestreview-1556906120