The check triggered in 30 / 1000 cases of running PeerConnectionIntegrationTest.CallTransferredForCaller locally, far more often than expected. It will soon be replaced by more graceful handling. BUG=webrtc:7845 Review-Url: https://codereview.webrtc.org/2975043002 Cr-Commit-Position: refs/heads/master@{#18983}