[jdk15u-dev] RFR: 8249215: JFrame::setVisible crashed with -Dfile.encoding=UTF-8 on Japanese Windows.

[Yuri Nesterenko]

The issue reported in 15, too, and should be backported here.

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Commit messages:
 - Backport e15e30fef22ddffcaef9449648ae93b407a7b598

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/55/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=55&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8249215
  Stats: 7 lines in 1 file changed: 4 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk15u-dev/pull/55.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/55/head:pull/55

PR: https://git.openjdk.java.net/jdk15u-dev/pull/55