[7u4] Request for review: 7124548 [macosx] Memory leak in JOptionPane.createDialog

[Sergey Bylokhov]

Hi Everyone,
It would be good to break connection to window peer when we dispose 
CGLayer. Because CGlayer can be used in the CGLSurfaceData which can be 
cached in BufferedContext.validatedSrcData.

Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7124548
Webrev can be found at: http://cr.openjdk.java.net/~serb/7124548/webrev.00/

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Best regards, Sergey.