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 66aba3536afe23e52e6b791e4430562d97b185e8..4bc023693175f050c17f024530411d484f48010c 100644
--- a/ui/gfx/font_fallback_win.cc
+++ b/ui/gfx/font_fallback_win.cc
@@ -29,6 +29,8 @@
 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) {
@@ -355,10 +357,11 @@
   DCHECK_GE(wcslen(text), static_cast<size_t>(text_length));
   text_length = std::min(wcslen(text), static_cast<size_t>(text_length));
 
-  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);