LibWeb+LibWebView+WebContent+Ladybird: Add IPC call that opens new tab

Author: https://github.com/kalenikaliaksandr
Commit: a9f8d4eada
Pull-request: https://github.com/SerenityOS/serenity/pull/17855
Reviewed-by: https://github.com/linusg
Reviewed-by: https://github.com/trflynn89 ✅

Ladybird/WebContentView.cpp

@@ -975,6 +975,11 @@ void WebContentView::notify_server_did_close_browsing_context(Badge<WebContentCl
     emit close();
 }
 
+String WebContentView::notify_request_open_new_tab(Badge<WebContentClient>)
+{
+    return {};
+}
+
 void WebContentView::notify_server_did_update_cookie(Badge<WebContentClient>, Web::Cookie::Cookie const& cookie)
 {
     if (on_update_cookie)