Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibWeb/HTML/UniversalGlobalScope.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2023, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2023, Luke Wilde <lukew@serenityos.org>
+ * Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Forward.h>
+#include <AK/String.h>
+#include <LibJS/Runtime/Value.h>
+#include <LibWeb/Forward.h>
+#include <LibWeb/WebIDL/ExceptionOr.h>
+
+namespace Web::HTML {
+
+// https://whatpr.org/html/9893/webappapis.html#universalglobalscope-mixin
+class UniversalGlobalScopeMixin {
+public:
+    virtual ~UniversalGlobalScopeMixin();
+
+    virtual Bindings::PlatformObject& this_impl() = 0;
+    virtual Bindings::PlatformObject const& this_impl() const = 0;
+
+    WebIDL::ExceptionOr<String> btoa(String const& data) const;
+    WebIDL::ExceptionOr<String> atob(String const& data) const;
+    void queue_microtask(WebIDL::CallbackType&);
+    WebIDL::ExceptionOr<JS::Value> structured_clone(JS::Value, StructuredSerializeOptions const&) const;
+};
+
+}