adapt FontConfig to use SK_FONTHOST_USES_FONTMGR

src/fonts/SkFontMgr_fontconfig.cpp

Index: src/fonts/SkFontMgr_fontconfig.cpp
diff --git a/src/fonts/SkFontMgr_fontconfig.cpp b/src/fonts/SkFontMgr_fontconfig.cpp
index a78575262fd41bb0edcb0339d463d5abe0ac4b13..1c87a72f06cc08a01b4a1423dcfcde87cde86c41 100644
--- a/src/fonts/SkFontMgr_fontconfig.cpp
+++ b/src/fonts/SkFontMgr_fontconfig.cpp
@@ -8,6 +8,7 @@
 #include "SkFontMgr.h"
 #include "SkFontStyle.h"
 #include "SkFontConfigInterface.h"
+#include "SkFontConfigTypeface.h"
 #include "SkMath.h"
 #include "SkString.h"
 #include "SkTDArray.h"
@@ -267,6 +268,12 @@ protected:
     virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) {
         return NULL;
     }
+    
+    virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],
+                                               unsigned styleBits) SK_OVERRIDE {
+        return FontConfigTypeface::LegacyCreateTypeface(NULL, familyName,
+                                                  (SkTypeface::Style)styleBits);
+    }
 };
 
 SkFontMgr* SkFontMgr::Factory() {