Everywhere: Hoist the Libraries folder to the top-level

Libraries/LibWeb/HTML/HTMLFrameSetElement.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/HTML/HTMLElement.h>
+#include <LibWeb/HTML/WindowEventHandlers.h>
+
+namespace Web::HTML {
+
+// NOTE: This element is marked as obsolete, but is still listed as required by the specification.
+class HTMLFrameSetElement final
+    : public HTMLElement
+    , public WindowEventHandlers {
+    WEB_PLATFORM_OBJECT(HTMLFrameSetElement, HTMLElement);
+    JS_DECLARE_ALLOCATOR(HTMLFrameSetElement);
+
+public:
+    virtual ~HTMLFrameSetElement() override;
+
+private:
+    HTMLFrameSetElement(DOM::Document&, DOM::QualifiedName);
+
+    virtual void initialize(JS::Realm&) override;
+    virtual void attribute_changed(FlyString const&, Optional<String> const& old_value, Optional<String> const&) override;
+
+    // ^HTML::GlobalEventHandlers
+    virtual JS::GCPtr<EventTarget> global_event_handlers_to_event_target(FlyString const& event_name) override;
+
+    // ^HTML::WindowEventHandlers
+    virtual JS::GCPtr<EventTarget> window_event_handlers_to_event_target() override;
+};
+
+}