[7u6] Request for approval: 7123957: Switch of Gnome theme ends up deadlocked in GTKEngine.native_switch_theme

[Dmitry Cherepanov]

This is a request to back port a fix from jdk8 to 7u6:

Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id= 7123957
Webrev: http://cr.openjdk.java.net/~dcherepanov/7123957/webrev.0/
Review: http://mail.openjdk.java.net/pipermail/awt-dev/2012-June/002988.html

Thanks,
Dmitry