LibWeb: Add stub reset algorithm for HTMLOutputElement

Userland/Libraries/LibWeb/HTML/HTMLOutputElement.cpp

@@ -17,4 +17,12 @@ HTMLOutputElement::HTMLOutputElement(DOM::Document& document, DOM::QualifiedName
 
 HTMLOutputElement::~HTMLOutputElement() = default;
 
+// https://html.spec.whatwg.org/multipage/form-elements.html#the-output-element:concept-form-reset-control
+void HTMLOutputElement::reset_algorithm()
+{
+    // 1. FIXME: String replace all with this element's default value within this element.
+
+    // 2. FIXME: Set this element's default value override to null.
+}
+
 }

Userland/Libraries/LibWeb/HTML/HTMLOutputElement.h

@@ -41,6 +41,8 @@ public:
     // https://html.spec.whatwg.org/multipage/forms.html#category-label
     virtual bool is_labelable() const override { return true; }
 
+    virtual void reset_algorithm() override;
+
 private:
     HTMLOutputElement(DOM::Document&, DOM::QualifiedName);
 };