bench, samples, etc: s/SkAutoTUnref/sk_sp/

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4437

Change-Id: Ice071684ac8a99e4bb405b4b9be8e8f42c7bac42
Reviewed-on: https://skia-review.googlesource.com/4437
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/bench/SKPAnimationBench.h b/bench/SKPAnimationBench.h
index c0bef30..7701595 100644
--- a/bench/SKPAnimationBench.h
+++ b/bench/SKPAnimationBench.h
@@ -40,10 +40,10 @@
     void drawPicture() override;
 
 private:
-    SkAutoTUnref<Animation>   fAnimation;
-    WallTimer                 fAnimationTimer;
-    SkString                  fUniqueName;
-    SkIRect                   fDevBounds;
+    sk_sp<Animation> fAnimation;
+    WallTimer        fAnimationTimer;
+    SkString         fUniqueName;
+    SkIRect          fDevBounds;
 
     typedef SKPBench INHERITED;
 };