[7u8] Request for approval: 7124244 [macosx] Shaped windows support

[Sergey Bylokhov]

Hi Everyone,
This is a back port from jdk 8 to jdk 7u8.

Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7124244
Webrev can be found at: http://cr.openjdk.java.net/~serb/7124244/webrev.04
Technical review: 
http://mail.openjdk.java.net/pipermail/awt-dev/2012-July/003094.html
jdk8 changeset: http://hg.openjdk.java.net/jdk8/awt/jdk/rev/f1a90ee31b38

Reviewers: Anthony Petrov

-- 
Best regards, Sergey.