Bug 1646700 [wpt PR 24235] - Update picture-in-picture idlharness tes…

…t, a=testonly

Automatic update from web-platform-tests
Update picture-in-picture idlharness test (#24235)

The actual idl update already happened in
web-platform-tests/wpt@1449b69,
but the associated test was not updated.

Closes web-platform-tests/wpt#24226
--

wpt-commits: b70f4c4663087bd441962e54ee6d062d39fc2ab5
wpt-pr: 24235

testing/web-platform/tests/picture-in-picture/idlharness.window.js

@@ -19,6 +19,7 @@ idl_test(
       DocumentOrShadowRoot: ['document'],
       HTMLVideoElement: ['video'],
       PictureInPictureWindow: ['pipw'],
+      PictureInPictureEvent: ['new PictureInPictureEvent("type", { pictureInPictureWindow: pipw })'],
     });
 
     self.video = await loadVideo();