Clean backport to `jfx20u`. Tested in connection with all other WebKit backports in `jfx-20.0.1` branch.
------------- Commit messages: - 8302684: Cherry-pick WebKit 615.1 stabilization fixes (2) Changes: https://git.openjdk.org/jfx20u/pull/6/files Webrev: https://webrevs.openjdk.org/?repo=jfx20u&pr=6&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8302684 Stats: 34 lines in 14 files changed: 18 ins; 1 del; 15 mod Patch: https://git.openjdk.org/jfx20u/pull/6.diff Fetch: git fetch https://git.openjdk.org/jfx20u pull/6/head:pull/6 PR: https://git.openjdk.org/jfx20u/pull/6
