<AWT Dev> [9] Review request for 8149151 Use local GraphicsEnvironment to get screen size in WToolkit

[Alexandr Scherbatiy]

Hello,

Could you review the fix:
   bug: https://bugs.openjdk.java.net/browse/JDK-8149151
   webrev: http://cr.openjdk.java.net/~alexsch/8149151/webev.00

   This is just an enhancement to use local GraphicsEnvironment instead 
of nativec alls to get screen size in WToolkit.
   It also allows to get rid of the calling Devices and checking its 
initialization in native getScreenWidth/height methods
   which can leads to some problems, see the discussion:
http://mail.openjdk.java.net/pipermail/awt-dev/2015-November/010388.html

  Thanks,
  Alexandr.