Revert of Link to DirectWrite directly, instead of calling LoadLibrary

ui/gfx/font_fallback_win.cc

Index: ui/gfx/font_fallback_win.cc
diff --git a/ui/gfx/font_fallback_win.cc b/ui/gfx/font_fallback_win.cc
index 02afed5006bc5babb3783183f8dc3e62e1d4a5f1..e3e89dffee6326e5d1d1260acb7e9a317195ac9d 100644
--- a/ui/gfx/font_fallback_win.cc
+++ b/ui/gfx/font_fallback_win.cc
@@ -28,6 +28,8 @@
 namespace gfx {
 
 namespace {
+
+IDWriteFactory* g_factory = nullptr;
 
 // Queries the registry to get a mapping from font filenames to font names.
 void QueryFontsFromRegistry(std::map<std::string, std::string>* map) {
@@ -348,10 +350,11 @@
   // renderer should instead use the font proxy.
   DCHECK(base::MessageLoopForUI::IsCurrent());
 
-  base::win::ScopedComPtr<IDWriteFactory> factory;
-  gfx::win::CreateDWriteFactory(factory.Receive());
+  if (g_factory == nullptr) {
+    gfx::win::CreateDWriteFactory(&g_factory);
+  }
   base::win::ScopedComPtr<IDWriteFactory2> factory2;
-  factory.QueryInterface(factory2.Receive());
+  g_factory->QueryInterface(factory2.Receive());
   if (!factory2) {
     // IDWriteFactory2 is not available before Win8.1
     return GetUniscribeFallbackFont(font, text, text_length, result);