Move final parts of class literal setup into a single runtime call

src/runtime/runtime-classes.cc

Index: src/runtime/runtime-classes.cc
diff --git a/src/runtime/runtime-classes.cc b/src/runtime/runtime-classes.cc
index 92df7fe0645d1e4e43017fe68c2ea8e109c0a4a1..317d34b8f5b0b4828a49b0034eb226255e1c68ad 100644
--- a/src/runtime/runtime-classes.cc
+++ b/src/runtime/runtime-classes.cc
@@ -253,6 +253,36 @@ RUNTIME_FUNCTION(Runtime_DefineClassMethod) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_FinalizeClassDefinition) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 2);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, constructor, 0);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, prototype, 1);
+
+  JSObject::MigrateSlowToFast(prototype, 0, "RuntimeToFastProperties");
+  JSObject::MigrateSlowToFast(constructor, 0, "RuntimeToFastProperties");
+
+  return *constructor;
+}
+
+
+RUNTIME_FUNCTION(Runtime_FinalizeClassDefinitionStrong) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 2);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, constructor, 0);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, prototype, 1);
+
+  JSObject::MigrateSlowToFast(prototype, 0, "RuntimeToFastProperties");
+  JSObject::MigrateSlowToFast(constructor, 0, "RuntimeToFastProperties");
+
+  RETURN_FAILURE_ON_EXCEPTION(isolate, JSObject::Freeze(prototype));
+  Handle<Object> result;
+  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
+                                     JSObject::Freeze(constructor));
+  return *result;
+}
+
+
 RUNTIME_FUNCTION(Runtime_ClassGetSourceCode) {
   HandleScope shs(isolate);
   DCHECK(args.length() == 1);