RFR: 8318629: G1: Refine code a bit in G1RemSetTrackingPolicy::update_at_allocate [v2]

[Hamlin Li]

> Hi,
> Can you help to review this simple refactoring?
> Thanks!

Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:

  refine code

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16300/files
  - new: https://git.openjdk.org/jdk/pull/16300/files/a7332e76..9c4149e1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16300&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16300&range=00-01

  Stats: 9 lines in 1 file changed: 3 ins; 2 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/16300.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16300/head:pull/16300

PR: https://git.openjdk.org/jdk/pull/16300