LibWeb: Provide missing includes to StructuredSerializeTypes.h

Author: https://github.com/trflynn89
Commit: 356727f294
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4828
Reviewed-by: https://github.com/shannonbooth ✅

Libraries/LibWeb/HTML/StructuredSerializeTypes.h

@@ -4,10 +4,13 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include <LibGC/Forward.h>
-
 #pragma once
 
+#include <AK/HashMap.h>
+#include <AK/Vector.h>
+#include <LibGC/Forward.h>
+#include <LibJS/Forward.h>
+
 namespace Web::HTML {
 
 using DeserializationMemory = GC::RootVector<JS::Value>;