Convert StringContent's Position usage tracking to use a WeakReference The test that is added only implicitly tests this but I added it because of a complete lack of any test for this code.
------------- Commit messages: - 8364230 Changes: https://git.openjdk.org/jdk/pull/26519/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26519&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8364230 Stats: 92 lines in 2 files changed: 71 ins; 14 del; 7 mod Patch: https://git.openjdk.org/jdk/pull/26519.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/26519/head:pull/26519 PR: https://git.openjdk.org/jdk/pull/26519
