[8u20] Request for approval: JDK-8024926 [macosx] AquaIcon HiDPI support

[Alexander Scherbatiy]

Hello,

Could you approve the backport of the fix to jdk8u-dev.

The bug: https://bugs.openjdk.java.net/browse/JDK-8024926
The webrev: http://cr.openjdk.java.net/~alexsch/8024926/webrev.02/
The review thread: 
http://mail.openjdk.java.net/pipermail/awt-dev/2013-December/006551.html
The jdk 9 changeset: 
http://hg.openjdk.java.net/jdk9/client/jdk/rev/4991a758abef

Thanks,
Alexandr.