chore: let result: ReturnType<typeof this._callWindowOpenHandler>; (#34669)

Co-authored-by: Milan Burda <[email protected]>

lib/browser/api/web-contents.ts

@@ -668,7 +668,7 @@ WebContents.prototype._init = function () {
         disposition
       };
 
-      let result;
+      let result: ReturnType<typeof this._callWindowOpenHandler>;
       try {
         result = this._callWindowOpenHandler(event, details);
       } catch (err) {
@@ -707,7 +707,7 @@ WebContents.prototype._init = function () {
         postBody
       };
 
-      let result;
+      let result: ReturnType<typeof this._callWindowOpenHandler>;
       try {
         result = this._callWindowOpenHandler(event, details);
       } catch (err) {