Clean backport to `jfx20u`. Tested in connection with all other WebKit backports in `jfx-20.0.1` branch.
------------- Commit messages: - 8301022: Video distortion is observed while playing youtube video Changes: https://git.openjdk.org/jfx20u/pull/7/files Webrev: https://webrevs.openjdk.org/?repo=jfx20u&pr=7&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8301022 Stats: 1527 lines in 4 files changed: 1527 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jfx20u/pull/7.diff Fetch: git fetch https://git.openjdk.org/jfx20u pull/7/head:pull/7 PR: https://git.openjdk.org/jfx20u/pull/7
