change SkStreams to work with sk_sp<SkData> instead of SkData*

src/ports/SkFontMgr_custom.cpp

Index: src/ports/SkFontMgr_custom.cpp
diff --git a/src/ports/SkFontMgr_custom.cpp b/src/ports/SkFontMgr_custom.cpp
index 65887662b03435437555178ea09bd2b61383897f..97489de50d6fba69b71303722349a2d304379941 100644
--- a/src/ports/SkFontMgr_custom.cpp
+++ b/src/ports/SkFontMgr_custom.cpp
@@ -261,7 +261,7 @@ protected:
     }
 
     SkTypeface* onCreateFromData(SkData* data, int ttcIndex) const override {
-        return this->createFromStream(new SkMemoryStream(data), ttcIndex);
+        return this->createFromStream(new SkMemoryStream(sk_ref_sp(data)), ttcIndex);
     }
 
     SkTypeface* onCreateFromStream(SkStreamAsset* bareStream, int ttcIndex) const override {