Use DirectWrite to populate list of avalible fonts

content/public/renderer/render_font_warmup_win.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_RENDERER_RENDER_FONT_WARMUP_WIN_H_
 #define CONTENT_PUBLIC_RENDERER_RENDER_FONT_WARMUP_WIN_H_
 
 #include "content/common/content_export.h"
 
+struct IDWriteFactory;
 class SkFontMgr;
 class SkTypeface;
 
 namespace content {
 
+// Gets the system direct write factory on systems with DirectWrite support.
+CONTENT_EXPORT void CreateDirectWriteFactory(IDWriteFactory**);
+
 // Make necessary calls to cache the data for a given font, used before
 // sandbox lockdown.
 CONTENT_EXPORT void DoPreSandboxWarmupForTypeface(SkTypeface* typeface);
 
 // Get the shared font manager used during pre-sandbox warmup for DirectWrite
 // fonts.
 CONTENT_EXPORT SkFontMgr* GetPreSandboxWarmupFontMgr();
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_FONT_WARMUP_WIN_H_