LibWeb: Implement the CrossOriginProperties AO

Author: https://github.com/linusg
Commit: 78938d933a
Pull-request: https://github.com/SerenityOS/serenity/pull/12919
Reviewed-by: https://github.com/awesomekling ✅

Userland/Libraries/LibWeb/Bindings/CrossOriginAbstractOperations.h

@@ -9,9 +9,16 @@
 #include <AK/Forward.h>
 #include <AK/Traits.h>
 #include <LibJS/Forward.h>
+#include <LibWeb/Forward.h>
 
 namespace Web::Bindings {
 
+struct CrossOriginProperty {
+    String property;
+    Optional<bool> needs_get {};
+    Optional<bool> needs_set {};
+};
+
 struct CrossOriginKey {
     FlatPtr current_settings_object;
     FlatPtr relevant_settings_object;
@@ -20,6 +27,8 @@ struct CrossOriginKey {
 
 using CrossOriginPropertyDescriptorMap = HashMap<CrossOriginKey, JS::PropertyDescriptor>;
 
+Vector<CrossOriginProperty> cross_origin_properties(Variant<LocationObject const*, WindowObject const*> const&);
+
 }
 
 namespace AK {