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/tests/ImageTest.cpp b/tests/ImageTest.cpp
index ce3cb99..15ee54c 100644
--- a/tests/ImageTest.cpp
+++ b/tests/ImageTest.cpp
@@ -62,13 +62,13 @@
 }
 static sk_sp<SkImage> create_image() {
     const SkImageInfo info = SkImageInfo::MakeN32(20, 20, kOpaque_SkAlphaType);
-    SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
+    auto surface(SkSurface::MakeRaster(info));
     draw_image_test_pattern(surface->getCanvas());
     return surface->makeImageSnapshot();
 }
 static sk_sp<SkImage> create_image_565() {
     const SkImageInfo info = SkImageInfo::Make(20, 20, kRGB_565_SkColorType, kOpaque_SkAlphaType);
-    SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
+    auto surface(SkSurface::MakeRaster(info));
     draw_image_test_pattern(surface->getCanvas());
     return surface->makeImageSnapshot();
 }
@@ -146,8 +146,7 @@
 #if SK_SUPPORT_GPU
 static sk_sp<SkImage> create_gpu_image(GrContext* context) {
     const SkImageInfo info = SkImageInfo::MakeN32(20, 20, kOpaque_SkAlphaType);
-    SkAutoTUnref<SkSurface> surface(SkSurface::NewRenderTarget(context, SkBudgeted::kNo,
-                                                               info));
+    auto surface(SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, info));
     draw_image_test_pattern(surface->getCanvas());
     return surface->makeImageSnapshot();
 }
@@ -224,7 +223,7 @@
 
 // Test that image encoding failures do not break picture serialization/deserialization.
 DEF_TEST(Image_Serialize_Encoding_Failure, reporter) {
-    SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(100, 100));
+    auto surface(SkSurface::MakeRasterN32Premul(100, 100));
     surface->getCanvas()->clear(SK_ColorGREEN);
     sk_sp<SkImage> image(surface->makeImageSnapshot());
     REPORTER_ASSERT(reporter, image);
@@ -287,7 +286,7 @@
     const SkPMColor red   = SkPackARGB32(0xFF, 0xFF, 0, 0);
     const SkPMColor green = SkPackARGB32(0xFF, 0, 0xFF, 0);
     SkImageInfo info = SkImageInfo::MakeN32Premul(2, 2);
-    SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
+    auto surface(SkSurface::MakeRaster(info));
     surface->getCanvas()->clear(0xFF00FF00);
 
     SkPMColor pixels[4];
@@ -373,7 +372,7 @@
     sk_sp<SkImage> image(create_gpu_image(context));
     const uint32_t uniqueID = image->uniqueID();
 
-    SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info));
+    auto surface(SkSurface::MakeRaster(info));
 
     // now we can test drawing a gpu-backed image into a cpu-backed surface