[jdk11u-dev] RFR: 8233558: [TESTBUG] WindowOwnedByEmbeddedFrameTest.java fails on macos

[Joshua Cao]

Backport for parity with oracle. Passes WindowOwnedByEmbeddedFrameTest.java on my Macos.

Fix conflict in ProblemList.txt. Clean backport otherwise.

-------------

Commit messages:
 - 8233558: [TESTBUG] WindowOwnedByEmbeddedFrameTest.java fails on macos

Changes: https://git.openjdk.org/jdk11u-dev/pull/1431/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1431&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8233558
  Stats: 2 lines in 2 files changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1431.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1431/head:pull/1431

PR: https://git.openjdk.org/jdk11u-dev/pull/1431