RFR: 8325082: Rename headers named 'heapRegion*' of G1 [v3]

[Lei Zaakjyu]

> 8325082: Rename headers named 'heapRegion*' of G1

Lei Zaakjyu has updated the pull request incrementally with one additional commit since the last revision:

  fix

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17666/files
  - new: https://git.openjdk.org/jdk/pull/17666/files/7d105a58..d65b6597

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17666&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17666&range=01-02

  Stats: 6 lines in 2 files changed: 3 ins; 3 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17666.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17666/head:pull/17666

PR: https://git.openjdk.org/jdk/pull/17666