[7u6] Request for approval for 7124247: [macosx] Implement GraphicsDevice.setDisplayMode()

[Alexander Zuev]

Hello,

   this is a request for approval of the push with fix for CR 7124247: 
[macosx] Implement GraphicsDevice.setDisplayMode()
into the 7u6 repository.

   Bug description: http://bugs.sun.com/view_bug.do?bug_id=7124247
   Webrev:
   Reviewed by: Sergey Bylokhov and Anthony Petrov

   Fix already integrated into jdk8.

With best regards,
Alexander Zuev