s/SkAutoTUnref/sk_sp/ in src/ part 1

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4480

Change-Id: I7d3219b02ad5094785e1b7635a9482e69aadbc8c
Reviewed-on: https://skia-review.googlesource.com/4480
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/src/image/SkSurface_Raster.cpp b/src/image/SkSurface_Raster.cpp
index c27e1bc..987ff2b 100644
--- a/src/image/SkSurface_Raster.cpp
+++ b/src/image/SkSurface_Raster.cpp
@@ -208,12 +208,12 @@
         return nullptr;
     }
 
-    SkAutoTUnref<SkPixelRef> pr(SkMallocPixelRef::NewZeroed(info, rowBytes, nullptr));
-    if (nullptr == pr.get()) {
+    sk_sp<SkPixelRef> pr(SkMallocPixelRef::NewZeroed(info, rowBytes, nullptr));
+    if (!pr) {
         return nullptr;
     }
     if (rowBytes) {
         SkASSERT(pr->rowBytes() == rowBytes);
     }
-    return sk_make_sp<SkSurface_Raster>(pr, props);
+    return sk_make_sp<SkSurface_Raster>(pr.get(), props);
 }