RFR: 8281035: Serial: Move RemoveForwardedPointerClosure to local scope

[Kim Barrett]

On Tue, 1 Feb 2022 11:01:51 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple change of moving `RemoveForwardedPointerClosure` from shared code to Serial code.
> 
> Test: hotspot_gc

Marked as reviewed by kbarrett (Reviewer).

src/hotspot/share/gc/serial/defNewGeneration.cpp line 684:

> 682:     }
> 683:   };
> 684:   ResetForwardedMarkWord cl;

`cl` could be declared as part of the struct declaration, rather than separately, thereby eliminating the additional occurrence of `ResetForwardedMarkWord`.  Your call...

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PR: https://git.openjdk.java.net/jdk/pull/7301