switch surface to sk_sp

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1817383002
CQ_EXTRA_TRYBOTS=client.skia.compile:Build-Ubuntu-GCC-x86_64-Release-CMake-Trybot,Build-Mac-Clang-x86_64-Release-CMake-Trybot

Review URL: https://codereview.chromium.org/1817383002
diff --git a/gm/textblobgeometrychange.cpp b/gm/textblobgeometrychange.cpp
index bae2381..0632908 100644
--- a/gm/textblobgeometrychange.cpp
+++ b/gm/textblobgeometrychange.cpp
@@ -44,7 +44,7 @@
 
         SkImageInfo info = SkImageInfo::MakeN32Premul(200, 200);
         SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
-        SkAutoTUnref<SkSurface> surface(canvas->newSurface(info, &props));
+        auto surface(canvas->makeSurface(info, &props));
         if (surface) {
             SkCanvas* c = surface->getCanvas();