RFR: 8265681: G1: general cleanup for G1FullGCHeapRegionAttr

Thu Apr 22 11:42:43 UTC 2021

General cleanups of `G1FullGCHeapRegionAttr`, its APIs and usage.

Regarding the naming, `SkipCompaction` is another option, but I went with the current version for the consistent `ing` suffix across all valid states..

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

Commit messages:
 - api

Changes: https://git.openjdk.java.net/jdk/pull/3621/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3621&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265681
  Stats: 68 lines in 10 files changed: 20 ins; 2 del; 46 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3621.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3621/head:pull/3621

PR: https://git.openjdk.java.net/jdk/pull/3621