chromium/third_party/blink/web_tests/external/wpt/webrtc/RTCPeerConnection-setRemoteDescription-simulcast.https-expected.txt

This is a testharness.js-based test.
[FAIL] createAnswer() attaches to an existing transceiver with a remote simulcast offer
  assert_equals: Expected exactly one transceiver expected 1 but got 2
Harness: the test ran to completion.