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

tests/PathTest.cpp

Index: tests/PathTest.cpp
diff --git a/tests/PathTest.cpp b/tests/PathTest.cpp
index 032b646d4e194314f61be4caf0e58c7b9b791401..483d14ec48c7d5e4d8b75497312bddef90c9e879 100644
--- a/tests/PathTest.cpp
+++ b/tests/PathTest.cpp
@@ -4083,7 +4083,7 @@ static void compare_dump(skiatest::Reporter* reporter, const SkPath& path, bool
         bool dumpAsHex, const char* str) {
     SkDynamicMemoryWStream wStream;
     path.dump(&wStream, force, dumpAsHex);
-    sk_sp<SkData> data(wStream.copyToData());
+    sk_sp<SkData> data = wStream.detachAsData();
     REPORTER_ASSERT(reporter, data->size() == strlen(str));
     if (strlen(str) > 0) {
         REPORTER_ASSERT(reporter, !memcmp(data->data(), str, strlen(str)));