Clean backport to `jfx11u`. Tested in connection with all other WebKit backports in `jfx-kcr-11.0.19` branch.
------------- Commit messages: - 8303217: Webview loaded webpage is not showing play, volume related buttons for embeded Audio/Video elements Changes: https://git.openjdk.org/jfx11u/pull/138/files Webrev: https://webrevs.openjdk.org/?repo=jfx11u&pr=138&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8303217 Stats: 400 lines in 18 files changed: 396 ins; 3 del; 1 mod Patch: https://git.openjdk.org/jfx11u/pull/138.diff Fetch: git fetch https://git.openjdk.org/jfx11u pull/138/head:pull/138 PR: https://git.openjdk.org/jfx11u/pull/138
