Metal L&F has dependency on the Windows L&F

I noticed Windows L&F being included in the 'rt.jar' for OS X and attempted to tell
the build system not to build/include it there, but it turns out that Metal has a dependency

Its in code 'that is only used on Windows' but nonetheless Metal won't compile unless
this one class is there.

Here's the error :

jdk/src/java.desktop/share/classes/javax/swing/plaf/metal/DefaultMetalTheme.java:431: error: cannot find symbol
            return (FontUIResource)props[type].createValue(null);
                                              ^
  symbol: method createValue(<null>)
  location: class MetalFontDesktopProperty

This usage is in a static nested class called WindowsFontDelegate

The problem is that MetalFontDesktopProperty extends com.sun.java.swing.plaf.windows.DesktopProperty

We need to break this dependency so that Metal can unburden itself of all the rest of the Win L&F