Use FontPlatformDataHarfBuzz.h on Windows

Source/platform/fonts/harfbuzz/FontPlatformDataHarfBuzz.cpp

 /*
  * Copyright (c) 2006, 2007, 2008, 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 267 matching lines @@
         m_style.useAntiAlias = useSkiaAntiAlias;
     if (m_style.useSubpixelRendering == FontRenderStyle::NoPreference)
         m_style.useSubpixelRendering = useSkiaSubpixelRendering;
 
     // TestRunner specifically toggles the subpixel positioning flag.
     if (m_style.useSubpixelPositioning == FontRenderStyle::NoPreference
         || isRunningLayoutTest())
         m_style.useSubpixelPositioning = useSkiaSubpixelPositioning;
 }
 
+bool FontPlatformData::defaultUseSubpixelPositioning()
+{
+    return FontDescription::subpixelPositioning();
+}
+
 } // namespace WebCore