update callsites for Make image factories

not forced yet, as we still have the build-guard. waiting on chrome CL

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1810813003

TBR=

Review URL: https://codereview.chromium.org/1810813003
diff --git a/tests/CachedDecodingPixelRefTest.cpp b/tests/CachedDecodingPixelRefTest.cpp
index fe6b412..da4a111 100644
--- a/tests/CachedDecodingPixelRefTest.cpp
+++ b/tests/CachedDecodingPixelRefTest.cpp
@@ -320,8 +320,8 @@
         TestImageGenerator::TestType test = testTypes[i];
         for (const SkColorType testColorType : testColorTypes) {
             SkImageGenerator* gen = new TestImageGenerator(test, r, testColorType);
-            SkAutoTUnref<SkImage> image(SkImage::NewFromGenerator(gen));
-            if (nullptr == image.get()) {
+            sk_sp<SkImage> image(SkImage::MakeFromGenerator(gen));
+            if (nullptr == image) {
                 ERRORF(r, "SkImage::NewFromGenerator unexpecedly failed ["
                     SK_SIZE_T_SPECIFIER "]", i);
                 continue;