Customize SkFontMgr::Factory to control DirectWrite vs. GDI selection

skia/ext/fontmgr_default_win.cc

Index: skia/ext/fontmgr_default_win.cc
diff --git a/skia/ext/fontmgr_default_win.cc b/skia/ext/fontmgr_default_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3b1031fa9b84153cd349e6843584e4f55ae8622b
--- /dev/null
+++ b/skia/ext/fontmgr_default_win.cc
@@ -0,0 +1,27 @@
+// 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.
+
+#include "skia/ext/fontmgr_default_win.h"
+
+#include "third_party/skia/include/ports/SkFontMgr.h"
+#include "third_party/skia/include/ports/SkTypeface_win.h"
+
+namespace {
+
+SkFontMgr* g_default_fontmgr;
+
+}  // namespace
+
+void SetDefaultSkiaFactory(SkFontMgr* fontmgr) {
+  g_default_fontmgr = fontmgr;
+}
+
+SK_API SkFontMgr* SkFontMgr::Factory() {
+  // This will be set when DirectWrite is in use, and an SkFontMgr has been
+  // created with the pre-sandbox warmed up one. Otherwise, we fallback to a
+  // GDI SkFontMgr which is used in the browser.
+  if (g_default_fontmgr)
+    return SkRef(g_default_fontmgr);
+  return SkFontMgr_New_GDI();
+}