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

tests/AnnotationTest.cpp

Index: tests/AnnotationTest.cpp
diff --git a/tests/AnnotationTest.cpp b/tests/AnnotationTest.cpp
index a4109c5e54927cbce0af8dfa738d541d05d370f8..71e378d55c5e2de95b2f23c46e03f06943c00961 100644
--- a/tests/AnnotationTest.cpp
+++ b/tests/AnnotationTest.cpp
@@ -51,7 +51,7 @@ DEF_TEST(Annotation_PdfLink, reporter) {
     SkAnnotateRectWithURL(canvas, r, data.get());
 
     REPORTER_ASSERT(reporter, doc->close());
-    sk_sp<SkData> out(outStream.copyToData());
+    sk_sp<SkData> out = outStream.makeCopy();
     const char* rawOutput = (const char*)out->data();
 
     REPORTER_ASSERT(reporter, ContainsString(rawOutput, out->size(), "/Annots "));
@@ -69,7 +69,7 @@ DEF_TEST(Annotation_NamedDestination, reporter) {
     SkAnnotateNamedDestination(canvas, p, data.get());
 
     REPORTER_ASSERT(reporter, doc->close());
-    sk_sp<SkData> out(outStream.copyToData());
+    sk_sp<SkData> out = outStream.makeCopy();
     const char* rawOutput = (const char*)out->data();
 
     REPORTER_ASSERT(reporter,