If it still handle packets, when a ping arrives, it will pass the packet to p2ptransportchannel, eventually causing an ASSERT error there (when p2ptransportchannel tries to create a connection from the ping request from unknown address). BUG= Review URL: https://codereview.webrtc.org/1649493006 Cr-Commit-Position: refs/heads/master@{#11430}