tools: s/SkAutoTUnref/sk_sp/

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4391

Change-Id: Iae8b032b00d3579c77f3b86370dde71c4649da45
Reviewed-on: https://skia-review.googlesource.com/4391
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/tools/skiaserve/Request.cpp b/tools/skiaserve/Request.cpp
index 134fdf0..c1b3b25 100644
--- a/tools/skiaserve/Request.cpp
+++ b/tools/skiaserve/Request.cpp
@@ -117,8 +117,8 @@
 
     SkDynamicMemoryWStream outStream;
 
-    SkAutoTUnref<SkPixelSerializer> serializer(SkImageEncoder::CreatePixelSerializer());
-    picture->serialize(&outStream, serializer);
+    sk_sp<SkPixelSerializer> serializer(SkImageEncoder::CreatePixelSerializer());
+    picture->serialize(&outStream, serializer.get());
 
     return outStream.detachAsData();
 }
@@ -280,7 +280,7 @@
 
 sk_sp<SkData> Request::getJsonInfo(int n) {
     // drawTo
-    SkAutoTUnref<SkSurface> surface(this->createCPUSurface());
+    sk_sp<SkSurface> surface(this->createCPUSurface());
     SkCanvas* canvas = surface->getCanvas();
 
     // TODO this is really slow and we should cache the matrix and clip