Convert SkAutoTUnref<SkData> to sk_sp<SkData>.

tools/visualize_color_gamut.cpp

Index: tools/visualize_color_gamut.cpp
diff --git a/tools/visualize_color_gamut.cpp b/tools/visualize_color_gamut.cpp
index 424106f9c4c903eb0513426f7e3b5f5b8eab734b..3da1e3c9362f2e0bc720974f825e047c3009dca6 100644
--- a/tools/visualize_color_gamut.cpp
+++ b/tools/visualize_color_gamut.cpp
@@ -159,7 +159,7 @@ int main(int argc, char** argv) {
     draw_gamut(&canvas, colorSpace->xyz(), input, 0xFF000000, true);
 
     // Finally, encode the result to the output file.
-    SkAutoTUnref<SkData> out(SkImageEncoder::EncodeData(gamut, SkImageEncoder::kPNG_Type, 100));
+    sk_sp<SkData> out(SkImageEncoder::EncodeData(gamut, SkImageEncoder::kPNG_Type, 100));
     if (!out) {
         SkDebugf("Failed to encode gamut output.\n");
         return -1;