1 files changed, 9 insertions, 0 deletions
diff --git a/chromium/ui/webui/resources/js/web_ui_listener_behavior.js b/chromium/ui/webui/resources/js/web_ui_listener_behavior.js
index 837518397f7..ffe11ba7bb7 100644
--- a/chromium/ui/webui/resources/js/web_ui_listener_behavior.js
+++ b/chromium/ui/webui/resources/js/web_ui_listener_behavior.js
@@ -47,4 +47,13 @@
   },
 };
 
+/** @interface */
+/* #export */ class WebUIListenerBehaviorInterface {
+  /**
+   * @param {string} eventName
+   * @param {!Function} callback
+   */
+  addWebUIListener(eventName, callback) {}
+}
+
 /* #ignore */ console.warn('crbug/1173575, non-JS module files deprecated.');