RFR: 8318629: G1: Refine code a bit in G1RemSetTrackingPolicy::update_at_allocate [v3]

[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 comments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16300/files
  - new: https://git.openjdk.org/jdk/pull/16300/files/9c4149e1..ce6f9892

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16300&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16300&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 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