LibWebView: Add do-not-track setting to about:settings

Author: https://github.com/trflynn89
Commit: 1be3e7fd8a
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4194
Reviewed-by: https://github.com/AtkinsSJ

Libraries/LibWebView/WebUI/SettingsUI.h

@@ -30,6 +30,8 @@ private:
     void add_site_setting_filter(JsonValue const&);
     void remove_site_setting_filter(JsonValue const&);
     void remove_all_site_setting_filters(JsonValue const&);
+
+    void set_do_not_track(JsonValue const&);
 };
 
 }