[8] Review request for 7124513: [macosx] Support NSTexturedBackgroundWindowMask/different titlebar styles to create unified toolbar

[Sergey Bylokhov]

Hi Everyone,
Please review the fix.
1 When the property "apple.awt.brushMetalLook" is set we draw our panels 
and toolbars with composite=SRc and alpha=0.
2 Changes in JViewport are needed, because copyArea does not handle 
correctly content with alpha!=1.0.


Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7124513
Webrev can be found at: http://cr.openjdk.java.net/~serb/7124513/webrev.00/

Also note that this CR depends from CR 7124244.

-- 
Best regards, Sergey.