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/gm/multipicturedraw.cpp b/gm/multipicturedraw.cpp
index 88d6cd7..c3f6b89 100644
--- a/gm/multipicturedraw.cpp
+++ b/gm/multipicturedraw.cpp
@@ -511,9 +511,8 @@
             for (int i = 0; i < composeSteps.count(); ++i) {
                 const ComposeStep& step = composeSteps[i];
 
-                SkAutoTUnref<SkImage> image(step.fSurf->newImageSnapshot());
-
-                canvas->drawImage(image, step.fX, step.fY, step.fPaint);
+                canvas->drawImage(step.fSurf->makeImageSnapshot().get(),
+                                  step.fX, step.fY, step.fPaint);
             }
         }