add portable and canonical font support for DM

gm/variedtext.cpp

Index: gm/variedtext.cpp
diff --git a/gm/variedtext.cpp b/gm/variedtext.cpp
index e174796780513c48b8f6ecfeea83be7fdecd94d9..978c22495c1cb3b783e4a0fc4a1ca91e735dc8b6 100644
--- a/gm/variedtext.cpp
+++ b/gm/variedtext.cpp
@@ -59,10 +59,10 @@ protected:
         SkScalar h = SkIntToScalar(size.fHeight);
 
         SK_COMPILE_ASSERT(4 == SK_ARRAY_COUNT(fTypefacesToUnref), typeface_cnt);
-        fTypefacesToUnref[0] = SkTypeface::CreateFromName("sans-serif", SkTypeface::kNormal);
-        fTypefacesToUnref[1] = SkTypeface::CreateFromName("sans-serif", SkTypeface::kBold);
-        fTypefacesToUnref[2] = SkTypeface::CreateFromName("serif", SkTypeface::kNormal);
-        fTypefacesToUnref[3] = SkTypeface::CreateFromName("serif", SkTypeface::kBold);
+        fTypefacesToUnref[0] = sk_tool_utils::portable_typeface("sans-serif", SkTypeface::kNormal);
+        fTypefacesToUnref[1] = sk_tool_utils::portable_typeface("sans-serif", SkTypeface::kBold);
+        fTypefacesToUnref[2] = sk_tool_utils::portable_typeface("serif", SkTypeface::kNormal);
+        fTypefacesToUnref[3] = sk_tool_utils::portable_typeface("serif", SkTypeface::kBold);
 
         SkRandom random;
         for (int i = 0; i < kCnt; ++i) {