LibWeb: Implement [SameObject] behavior for HTMLTableSectionElement.rows

Author: https://github.com/awesomekling
Commit: ad36bc72f4
Pull-request: https://github.com/SerenityOS/serenity/pull/16175
Reviewed-by: https://github.com/ADKaster

Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.h

@@ -23,6 +23,10 @@ public:
 
 private:
     HTMLTableSectionElement(DOM::Document&, DOM::QualifiedName);
+
+    virtual void visit_edges(Cell::Visitor&) override;
+
+    JS::GCPtr<DOM::HTMLCollection> mutable m_rows;
 };
 
 }