Class fields, part 2 (desugaring)

src/runtime/runtime-object.cc

Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index 6d4bad5c6f889e5f0f833c648a1db335eb10cd0b..d3d986c9009b9216c7ef05f89a7d0e27e17636ae 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -676,6 +676,38 @@ RUNTIME_FUNCTION(Runtime_DefineDataPropertyInLiteral) {
   return *object;
 }
 
+RUNTIME_FUNCTION(Runtime_DefineDataProperty) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 5);
+  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
+  CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
+  CONVERT_SMI_ARG_CHECKED(set_function_name, 4);
+
+  if (set_function_name) {
+    DCHECK(value->IsJSFunction());
+    JSFunction::SetName(Handle<JSFunction>::cast(value), name,
+                        isolate->factory()->empty_string());
+  }
+
+  PropertyDescriptor desc;
+  desc.set_writable(!(attrs & ReadOnly));
+  desc.set_enumerable(!(attrs & DontEnum));
+  desc.set_configurable(!(attrs & DontDelete));
+  desc.set_value(value);
+
+  Maybe<bool> result = JSReceiver::DefineOwnProperty(isolate, receiver, name,
+                                                     &desc, Object::DONT_THROW);
+  RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
+  if (result.IsNothing()) {
+    DCHECK(isolate->has_pending_exception());
+    return isolate->heap()->exception();
+  }
+
+  return *receiver;
+}
+
 // Return property without being observable by accessors or interceptors.
 RUNTIME_FUNCTION(Runtime_GetDataProperty) {
   HandleScope scope(isolate);