conflict.
A role conflict received from an unknown address (peer reflexive
candidate) results in an early return before signaling the unknown
address to P2PTransportChannel. Without this signal, there is no
candidate pair or TURN entry created, and sending the error response
when handling the role conflict fails.
Bug: webrtc:9034
Change-Id: I0f1b232a574449e98025618d93aac8a91b30e14b
Reviewed-on: https://webrtc-review.googlesource.com/63840
Commit-Queue: Qingsi Wang <qingsi@google.com>
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22588}