RFR: 8309306: G1: Move is_obj_dead from HeapRegion to G1CollectedHeap

[Albert Mingkun Yang]

On Thu, 1 Jun 2023 15:05:41 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple refactoring around `HeapRegion::is_obj_dead`.
> 
> Test: hotspot_gc

Thanks for the review.

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PR Comment: https://git.openjdk.org/jdk/pull/14265#issuecomment-1587113712