Clean backport to jfx11u. -------------
Commit messages: - 8088420: JavaFX WebView memory leak via EventListener Changes: https://git.openjdk.org/jfx11u/pull/105/files Webrev: https://webrevs.openjdk.org/?repo=jfx11u&pr=105&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8088420 Stats: 1509 lines in 11 files changed: 1503 ins; 3 del; 3 mod Patch: https://git.openjdk.org/jfx11u/pull/105.diff Fetch: git fetch https://git.openjdk.org/jfx11u pull/105/head:pull/105 PR: https://git.openjdk.org/jfx11u/pull/105
