<AWT Dev> [9] Review request for 8053657: [TEST_BUG] move some 5 tests related to undecorated Frame/JFrame to JDK

[Yuri Nesterenko]

Hi team,

please review yet another test update in jdk9:

http://cr.openjdk.java.net/~yan/8053657/webrev.00

( https://bugs.openjdk.java.net/browse/JDK-8053657 )

These are 5 tests made out of some 8 old functional ones
dealing with undecorated Frames (and JFrames).

NB: piggybacking here a removal of
java/awt/Mixing/AWT_Mixing/Util.java.
It was approved long ago but I forgot to delete it in
time.

Tests proven on 4 platforms in continuous runs.

Thanks,
-yan