Bug 1715512 part 5 - Add GetObjectFlagsForNewProperty overload that takes JSClass and ObjectFlags instead of shape. r=jonco

The overload taking a shape will be removed in a later patch.

Differential Revision: https://phabricator.services.mozilla.com/D117305

js/src/vm/ObjectFlags-inl.h

@@ -16,10 +16,9 @@
 
 namespace js {
 
-MOZ_ALWAYS_INLINE ObjectFlags GetObjectFlagsForNewProperty(
-    Shape* last, jsid id, PropertyFlags propFlags, JSContext* cx) {
-  ObjectFlags flags = last->objectFlags();
-
+MOZ_ALWAYS_INLINE ObjectFlags
+GetObjectFlagsForNewProperty(const JSClass* clasp, ObjectFlags flags, jsid id,
+                             PropertyFlags propFlags, JSContext* cx) {
   uint32_t index;
   if (IdIsIndex(id, &index)) {
     flags.setFlag(ObjectFlag::Indexed);
@@ -28,14 +27,20 @@ MOZ_ALWAYS_INLINE ObjectFlags GetObjectFlagsForNewProperty(
   }
 
   if ((!propFlags.isDataProperty() || !propFlags.writable()) &&
-      last->getObjectClass() == &PlainObject::class_ &&
-      !id.isAtom(cx->names().proto)) {
+      clasp == &PlainObject::class_ && !id.isAtom(cx->names().proto)) {
     flags.setFlag(ObjectFlag::HasNonWritableOrAccessorPropExclProto);
   }
 
   return flags;
 }
 
+MOZ_ALWAYS_INLINE ObjectFlags GetObjectFlagsForNewProperty(
+    Shape* last, jsid id, PropertyFlags propFlags, JSContext* cx) {
+  ObjectFlags flags = last->objectFlags();
+  const JSClass* clasp = last->getObjectClass();
+  return GetObjectFlagsForNewProperty(clasp, flags, id, propFlags, cx);
+}
+
 }  // namespace js
 
 #endif /* vm_ObjectFlags_inl_h */