GitLab

https://github.com/webrtc/apprtc/blob/20cdd7652d58c9cf47ef92ba0190a5505760dc05/src/web_app/js/call.js#L159
sends an XHR on page close which is now an error in Chromium. Ignoring the error doesn't cause any problems, especially for the purpose of this test, so until a real fix is made, this is a simple way to un-break tests.
(https://ci.chromium.org/p/chromium/g/chromium.webrtc)

Bug: 918871
Change-Id: I29497a39424a1c54e7b6875edc0cb896663221ea
Reviewed-on: https://chromium-review.googlesource.com/c/1396019Reviewed-by: Henrik Boström <hbos@chromium.org>
Commit-Queue: Oleh Prypin <oprypin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619943}