git: openjdk/jdk15u-dev: 8244088: [Regression] Switch of Gnome theme ends up in deadlocked UI

[Yuri Nesterenko]

Changeset: 5626db38
Author:    Yuri Nesterenko <yan at openjdk.org>
Date:      2021-05-05 09:33:59 +0000
URL:       https://git.openjdk.java.net/jdk15u-dev/commit/5626db38fe39dd43b46d9f28d792a73a075188d3

8244088: [Regression] Switch of Gnome theme ends up in deadlocked UI

Backport-of: a7f46919ff43ede12ed977512a3b0d93bc4cbc76

! src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.c
! src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.h
! src/java.desktop/unix/native/libawt_xawt/awt/swing_GTKEngine.c