RFR: 8325082: Rename headers named 'heapRegion*' of G1 [v4]

[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:

  rename

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17666/files
  - new: https://git.openjdk.org/jdk/pull/17666/files/d65b6597..faa6f661

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17666&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17666&range=02-03

  Stats: 15 lines in 7 files changed: 0 ins; 0 del; 15 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