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/dm/DMSrcSinkAndroid.cpp b/dm/DMSrcSinkAndroid.cpp
index 77ec1c9..c204b36 100644
--- a/dm/DMSrcSinkAndroid.cpp
+++ b/dm/DMSrcSinkAndroid.cpp
@@ -48,7 +48,7 @@
         Error draw(SkCanvas* canvas) const override {
             // Pass through HWUI's upper layers to get operational transforms
             std::unique_ptr<android::Canvas> ac(android::Canvas::create_canvas(canvas));
-            SkAutoTUnref<android::uirenderer::SkiaCanvasProxy> scProxy
+            sk_sp<android::uirenderer::SkiaCanvasProxy> scProxy
                 (new android::uirenderer::SkiaCanvasProxy(ac.get()));
 
             // Pass through another proxy to get paint transforms