SkPDF: use sk_ref_sp

src/pdf/SkPDFDevice.cpp

Index: src/pdf/SkPDFDevice.cpp
diff --git a/src/pdf/SkPDFDevice.cpp b/src/pdf/SkPDFDevice.cpp
index 9d593aa80ae0a8ada38d4b3ea5580baa672ac229..744d42d25ea169dc4628c6fedbcb29555f928b68 100644
--- a/src/pdf/SkPDFDevice.cpp
+++ b/src/pdf/SkPDFDevice.cpp
@@ -1711,7 +1711,7 @@ void SkPDFDevice::appendDestinations(SkPDFDict* dict, SkPDFObject* page) const {
     for (const NamedDestination& dest : fNamedDestinations) {
         auto pdfDest = sk_make_sp<SkPDFArray>();
         pdfDest->reserve(5);
-        pdfDest->appendObjRef(sk_sp<SkPDFObject>(SkRef(page)));
+        pdfDest->appendObjRef(sk_ref_sp(page));
         pdfDest->appendName("XYZ");
         SkPoint p = fInitialTransform.mapXY(dest.point.x(), dest.point.y());
         pdfDest->appendScalar(p.x());