RFR: 8237567: Refactor G1-specific code in shared VM_CollectForMetadataAllocation

[Albert Mingkun Yang]

On Fri, 27 Aug 2021 15:48:50 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

> Hi all,
> 
> Please review this refactoring change to move G1 specific code out of VM_CollectForMetadataAllocation. 
> 
> Testing: Tier 1-3.

Marked as reviewed by ayang (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/5282