Remove SkiaFontWin as it is no longer used

Source/platform/fonts/mac/FontMac.cpp

 /*
  * Copyright (c) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 145 matching lines @@
         && gc->strokeThickness() > 0) {
 
         SkPaint paint;
         gc->setupPaintForStroking(&paint);
         setupPaint(&paint, font, this, shouldAntialias, shouldSmoothFonts);
         gc->adjustTextRenderMode(&paint);
         paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
 
         if (textMode & TextModeFill) {
             // If we also filled, we don't want to draw shadows twice.
-            // See comment in FontChromiumWin.cpp::paintSkiaText() for more details.
+            // See comment in FontHarfBuzz.cpp::paintGlyphs() for more details.
             paint.setLooper(0);
         }
 
         gc->drawPosText(glyphs, numGlyphs * sizeof(uint16_t), pos, textRect, paint);
     }
     if (font->platformData().orientation() == Vertical)
         gc->restore();
 }
 
 } // namespace WebCore