LibWeb: Move logic to check if valueAsNumber applies to its own function

Author: https://github.com/bplaat
Commit: 1a63639518
Pull-request: https://github.com/SerenityOS/serenity/pull/22166
Reviewed-by: https://github.com/LucasChollet
Reviewed-by: https://github.com/shannonbooth
Reviewed-by: https://github.com/trflynn89 ✅

Userland/Libraries/LibWeb/HTML/HTMLInputElement.h

@@ -160,6 +160,7 @@ public:
 
     bool has_input_activation_behavior() const;
     bool change_event_applies() const;
+    bool value_as_number_applies() const;
 
 private:
     HTMLInputElement(DOM::Document&, DOM::QualifiedName);