Use Skia's matchFamilyStyleCharacter API for font fallback

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 f71e0d81143fc7c8720a7f7da927338aca506e40..245897740b760fab958ef028b4a0756c0ba2e430 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
@@ -5,6 +5,7 @@
 #include "content/child/dwrite_font_proxy/dwrite_font_proxy_init_win.h"
 
 #include <dwrite.h>
+#include <dwrite_2.h>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ -83,8 +84,17 @@ void InitializeDWriteFontProxy(
     }
   }
 
-  skia::RefPtr<SkFontMgr> skia_font_manager = skia::AdoptRef(
-      SkFontMgr_New_DirectWrite(factory.Get(), g_font_collection.Get()));
+  // DirectWrite font fallback does not work if it is initialized after the
+  // sandbox starts.
+  mswr::ComPtr<IDWriteFactory2> factory2;
+  factory.As<IDWriteFactory2>(&factory2);  // QueryInterface
+  mswr::ComPtr<IDWriteFontFallback> font_fallback;
+  if (factory2.Get())
+    factory2->GetSystemFontFallback(&font_fallback);
+
+  skia::RefPtr<SkFontMgr> skia_font_manager =
+      skia::AdoptRef(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