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/tools/Resources.h b/tools/Resources.h
index 5e76eb3..678e4c8 100644
--- a/tools/Resources.h
+++ b/tools/Resources.h
@@ -8,6 +8,7 @@
 #ifndef Resources_DEFINED
 #define Resources_DEFINED
 
+#include "SkRefCnt.h"
 #include "SkString.h"
 
 class SkBitmap;
@@ -19,7 +20,7 @@
 void SetResourcePath(const char* );
 
 bool GetResourceAsBitmap(const char* resource, SkBitmap* dst);
-SkImage* GetResourceAsImage(const char* resource);
+sk_sp<SkImage> GetResourceAsImage(const char* resource);
 SkStreamAsset* GetResourceAsStream(const char* resource);
 SkTypeface* GetResourceAsTypeface(const char* resource);