RFR: 8290357: Drop HeapRegion::marked_bytes() [v2]

[Thomas Schatzl]

> Hi all,
> 
>   please review this removal of the `HeapRegion::_marked_bytes` member that records the bytes marked below tams in the recent mark as it is not really interesting in the removed places. I added comments to give reasons for this removal in the particular places for your review.
> 
> Testing: jtreg gc/g1, gha
> 
> Thanks,
>   Thomas

Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:

  Remove actual member and references

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/9511/files
  - new: https://git.openjdk.org/jdk/pull/9511/files/9d7f95bb..f1c5bc5a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9511&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9511&range=00-01

  Stats: 5 lines in 2 files changed: 0 ins; 4 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/9511.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9511/head:pull/9511

PR: https://git.openjdk.org/jdk/pull/9511