Add plumbing in blink to allow overriding the default font collection.

third_party/WebKit/Source/web/win/WebFontRendering.cpp

Index: third_party/WebKit/Source/web/win/WebFontRendering.cpp
diff --git a/third_party/WebKit/Source/web/win/WebFontRendering.cpp b/third_party/WebKit/Source/web/win/WebFontRendering.cpp
index 758922b38cd422b771edeeb46d4ee335e3710d0b..222df529f55879697b843241b7d86929938808e7 100644
--- a/third_party/WebKit/Source/web/win/WebFontRendering.cpp
+++ b/third_party/WebKit/Source/web/win/WebFontRendering.cpp
@@ -15,9 +15,9 @@ void WebFontRendering::setUseDirectWrite(bool useDirectWrite)
 }
 
 // static
-void WebFontRendering::setDirectWriteFactory(IDWriteFactory* factory)
+void WebFontRendering::setSkiaFontManager(SkFontMgr* fontManager)
 {
-    FontCache::setDirectWriteFactory(factory);
+    FontCache::setFontManager(fontManager);
 }
 
 // static