Clean backport to `jfx20u`. Tested in connection with all other WebKit backports in `jfx-20.0.1` branch.
------------- Commit messages: - 8302294: Cherry-pick WebKit 615.1 stabilization fixes Changes: https://git.openjdk.org/jfx20u/pull/5/files Webrev: https://webrevs.openjdk.org/?repo=jfx20u&pr=5&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8302294 Stats: 1797 lines in 198 files changed: 834 ins; 508 del; 455 mod Patch: https://git.openjdk.org/jfx20u/pull/5.diff Fetch: git fetch https://git.openjdk.org/jfx20u pull/5/head:pull/5 PR: https://git.openjdk.org/jfx20u/pull/5
