switch surface to sk_sp

samplecode/SampleTextureDomain.cpp

Index: samplecode/SampleTextureDomain.cpp
diff --git a/samplecode/SampleTextureDomain.cpp b/samplecode/SampleTextureDomain.cpp
index 2c6dd64301fca576da0e1a29a661f7b3d44df460..59d0822b44c60cca183eac0618b4e843f1a15ed2 100644
--- a/samplecode/SampleTextureDomain.cpp
+++ b/samplecode/SampleTextureDomain.cpp
@@ -60,7 +60,7 @@ protected:
         // Note:  GPU-backed bitmaps follow a different rendering path
         // when copying from one GPU device to another.
         SkImageInfo info = SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType);
-        SkAutoTUnref<SkSurface> surface(canvas->newSurface(info));
+        auto surface(canvas->makeSurface(info));
 
         srcRect.setXYWH(1, 1, 3, 3);
         dstRect.setXYWH(1, 1, 3, 3);