Remove use of legacy SkFontMgr factories.

content/child/dwrite_font_proxy/dwrite_font_proxy_init_win.cc

Index: content/child/dwrite_font_proxy/dwrite_font_proxy_init_win.cc
diff --git a/content/child/dwrite_font_proxy/dwrite_font_proxy_init_win.cc b/content/child/dwrite_font_proxy/dwrite_font_proxy_init_win.cc
index 5708d60caa65511fa862ea0787649258d8e46a6d..9ac9311d8d0d0788972ff39ad98c47c04afd8580 100644
--- a/content/child/dwrite_font_proxy/dwrite_font_proxy_init_win.cc
+++ b/content/child/dwrite_font_proxy/dwrite_font_proxy_init_win.cc
@@ -70,14 +70,11 @@ void InitializeDWriteFontProxy() {
         &font_fallback, g_font_collection.Get(), sender);
   }
 
-  sk_sp<SkFontMgr> skia_font_manager(SkFontMgr_New_DirectWrite(
-      factory.Get(), g_font_collection.Get(), font_fallback.Get()));
-  blink::WebFontRendering::setSkiaFontManager(skia_font_manager.get());
-
-  // Add an extra ref for SetDefaultSkiaFactory, which keeps a ref but doesn't
-  // addref.
-  skia_font_manager->ref();
-  SetDefaultSkiaFactory(skia_font_manager.get());
+  sk_sp<SkFontMgr> skia_font_manager = SkFontMgr_New_DirectWrite(
+      factory.Get(), g_font_collection.Get(), font_fallback.Get());
+  blink::WebFontRendering::setSkiaFontManager(skia_font_manager);
+
+  SetDefaultSkiaFactory(std::move(skia_font_manager));
 
   // When IDWriteFontFallback is not available (prior to Win8.1) Skia will
   // still attempt to use DirectWrite to determine fallback fonts (in