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This only causes an increased likelihood of role conflicts as each peer is picking a new role. It also means that if ICE is restarted for only one media stream, roles can be different across media streams (which isn't even allowed). For more explanation of why this is unnecessary and should be changed, see this discussion: https://mailarchive.ietf.org/arch/msg/ice/C0_QRCTNcwtvUF12y28jQicPR10 Review-Url: https://codereview.webrtc.org/2046123003 Cr-Commit-Position: refs/heads/master@{#13077}