sk_make_sp<T>()

because
    auto atm = sk_make_sp<SkAdvancedTypefaceMetrics>();
is better than
    sk_sp<SkAdvancedTypefaceMetrics> atm(new SkAdvancedTypefaceMetrics);

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1753973002

Review URL: https://codereview.chromium.org/1753973002

include/core/SkRefCnt.h

@@ -11,6 +11,7 @@
 #include "../private/SkAtomics.h"
 #include "../private/SkUniquePtr.h"
 #include "SkTypes.h"
+#include <utility>
 
 /** \class SkRefCntBase
 
@@ -326,4 +327,9 @@ private:
     T*  fPtr;
 };
 
+template <typename T, typename... Args>
+sk_sp<T> sk_make_sp(Args&&... args) {
+    return sk_sp<T>(new T(std::forward<Args>(args)...));
+}
+
 #endif

tests/RefCntTest.cpp

@@ -120,7 +120,7 @@ public:
 };
 
 static sk_sp<Effect> Create() {
-    return sk_sp<Effect>(new Effect);
+    return sk_make_sp<Effect>();
 }
 
 class Paint {