Remove SkiaFontWin as it is no longer used

Source/platform/fonts/harfbuzz/FontHarfBuzz.cpp

 /*
  * Copyright (c) 2007, 2008, 2010 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 67 matching lines @@
         && gc->strokeStyle() != NoStroke
         && gc->strokeThickness() > 0) {
 
         SkPaint paint;
         gc->setupPaintForStroking(&paint);
         font->platformData().setupPaint(&paint, gc);
         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.
-            // Since we use the looper for shadows, we remove it (if any) now.
+            // If there is a shadow and we filled above, there will already be
+            // a shadow. We don't want to draw it again or it will be too dark
+            // and it will go on top of the fill.
+            //
+            // Note that this isn't strictly correct, since the stroke could be
+            // very thick and the shadow wouldn't account for this. The "right"
+            // thing would be to draw to a new layer and then draw that layer
+            // with a shadow. But this is a lot of extra work for something
+            // that isn't normally an issue.
             paint.setLooper(0);
         }
 
         gc->drawPosText(glyphs, numGlyphs << 1, pos, textRect, paint);
     }
 }
 
 void Font::drawGlyphs(GraphicsContext* gc, const SimpleFontData* font,
     const GlyphBuffer& glyphBuffer, unsigned from, unsigned numGlyphs,
     const FloatPoint& point, const FloatRect& textRect) const
@@ skipping 135 matching lines @@
                                             const FloatPoint& point, int height,
                                             int from, int to) const
 {
     HarfBuzzShaper shaper(this, run);
     if (!shaper.shape())
         return FloatRect();
     return shaper.selectionRect(point, height, from, to);
 }
 
 } // namespace WebCore