return pictures as sk_sp

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1811703002

Review URL: https://codereview.chromium.org/1811703002
diff --git a/tools/dump_record.cpp b/tools/dump_record.cpp
index 96b8937..52f8f8c 100644
--- a/tools/dump_record.cpp
+++ b/tools/dump_record.cpp
@@ -49,7 +49,7 @@
             SkDebugf("Could not read %s.\n", FLAGS_skps[i]);
             return 1;
         }
-        SkAutoTUnref<SkPicture> src(SkPicture::CreateFromStream(stream));
+        sk_sp<SkPicture> src(SkPicture::MakeFromStream(stream));
         if (!src) {
             SkDebugf("Could not read %s as an SkPicture.\n", FLAGS_skps[i]);
             return 1;
@@ -79,7 +79,7 @@
                          0,
                          nullptr,
                          nullptr);
-            SkAutoTUnref<SkPicture> dst(r.endRecording());
+            sk_sp<SkPicture> dst(r.finishRecordingAsPicture());
             SkFILEWStream ostream(FLAGS_write[0]);
             dst->serialize(&ostream);
         }