RFR: 8317730: Change byte_size to return size_t

Mon Oct 9 13:06:38 UTC 2023

Simple signature update to `byte_size` to match expectation from callers.

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Commit messages:
 - byte-size

Changes: https://git.openjdk.org/jdk/pull/16100/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16100&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8317730
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/16100.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16100/head:pull/16100

PR: https://git.openjdk.org/jdk/pull/16100