Use default SkFontMgr on Windows.

Source/platform/fonts/win/FontCacheSkiaWin.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Computer, Inc.
  * Copyright (c) 2006, 2007, 2008, 2009, 2012 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.
@@ skipping 32 matching lines @@
 namespace WebCore {
 
 FontCache::FontCache()
     : m_purgePreventCount(0)
 {
     SkFontMgr* fontManager = 0;
 
     // Prefer DirectWrite (if runtime feature is enabled) but fallback
     // to GDI on platforms where DirectWrite is not supported.
     if (RuntimeEnabledFeatures::directWriteEnabled())
-        fontManager = SkFontMgr_New_DirectWrite();
+        fontManager = SkFontMgr::RefDefault();
 
     // Subpixel text positioning is not supported by the GDI backend.
     m_useSubpixelPositioning = fontManager
         ? RuntimeEnabledFeatures::subpixelFontScalingEnabled()
         : false;
 
     if (!fontManager)
         fontManager = SkFontMgr_New_GDI();
 
     m_fontManager = adoptPtr(fontManager);
@@ skipping 146 matching lines @@
         name.data(),
         fontSize,
         fontDescription.weight() >= FontWeightBold && !tf->isBold() || fontDescription.isSyntheticBold(),
         fontDescription.style() == FontStyleItalic && !tf->isItalic() || fontDescription.isSyntheticItalic(),
         fontDescription.orientation(),
         m_useSubpixelPositioning);
     return result;
 }
 
 }