LibJS: Add the WeakSet built-in object

Author: https://github.com/IdanHo
Commit: 8b6beac5ce
Pull-request: https://github.com/SerenityOS/serenity/pull/7954
Reviewed-by: https://github.com/linusg

Userland/Libraries/LibJS/Runtime/WeakSet.cpp

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibJS/Runtime/WeakSet.h>
+
+namespace JS {
+
+WeakSet* WeakSet::create(GlobalObject& global_object)
+{
+    return global_object.heap().allocate<WeakSet>(global_object, *global_object.weak_set_prototype());
+}
+
+WeakSet::WeakSet(Object& prototype)
+    : Object(prototype)
+{
+}
+
+WeakSet::~WeakSet()
+{
+}
+
+}