[OpenJDK 2D-Dev] [9] Review request for 8073320 Windows HiDPI Graphics support

[Alexander Scherbatiy]

Hello,

Could you review the fix:
   bug: https://bugs.openjdk.java.net/browse/JDK-8073320
   webrev: http://cr.openjdk.java.net/~alexsch/8073320/webrev.00

   This is an initial part of the HiDPI Graphics support on Windows for 
the JEP 263: HiDPI Graphics on Windows and Linux
     http://openjdk.java.net/jeps/263

   - scale factors are added to surface dates
   - window size, events coordinates and font are scaled on native side
   - backup buffered image is scaled in SunVolatileImage
   - AwtRobot MouseMove() and GetRGBPixels() methods are updated
   - GetDpiForMonitor function is used to query the specified monitor 
for the horizontal and vertical DPI values.
     If it is not available ID2D1Factory::GetDesktopDpi method is used 
instead.
   - "sun.java2d.uiScale.enabled", "sun.java2d.win.uiScale", 
"sun.java2d.win.uiScaleX", and "sun.java2d.win.uiScaleY"  options are 
added for the testing purposes.

Thanks,
Alexandr.