LibWeb: Recreate the <input> shadow tree when the type attribute changes

This is often used on login forms, for example, to toggle the visibility
of a password. The site will change the <input> element's type to "text"
to allow the password to show.

Userland/Libraries/LibWeb/HTML/HTMLInputElement.h

@@ -265,6 +265,7 @@ private:
     JS::GCPtr<DOM::Element> m_placeholder_element;
     JS::GCPtr<DOM::Text> m_placeholder_text_node;
 
+    void update_text_input_shadow_tree();
     JS::GCPtr<DOM::Element> m_inner_text_element;
     JS::GCPtr<DOM::Text> m_text_node;
     bool m_checked { false };