commit 71677452f9cf210aa98162c6f4bd8d339e625337
author Zhi Huang <zhihuang@webrtc.org> Mon Nov 13 18:35:57 2017
committer Commit Bot <commit-bot@chromium.org> Mon Nov 13 20:57:31 2017
tree 3d1fd41d7dbe41358de85dc2bf9d88ddcbec4126
parent edfa7d7131a14e0c3ee6848adf0fcc6a2b8be307

Replaced the SignalSelectedCandidatePairChanged with a new signal.

|transport overhead| field is added to rtc::NetworkRoute structure.

In PackTransportInternal:
1. network_route() is added which returns the current network route.
2. debug_name() is removed.
3. transport_name() is moved from DtlsTransportInternal and
   IceTransportInternal to PacketTransportInternal.

When the selected candidate pair is changed, the P2PTransportChannel
will fire the SignalNetworkRouteChanged instead of
SignalSelectedCandidatePairChanged to upper layers.

The Rtp/SrtpTransport takes the responsibility of calculating the
transport overhead from the BaseChannel so that the BaseChannel
doesn't need to depend on P2P layer transports.

Bug: webrtc:7013
Change-Id: I60d30d785666a50a95052d00bf08f829d8f57e9c
Reviewed-on: https://webrtc-review.googlesource.com/13520
Commit-Queue: Zhi Huang <zhihuang@webrtc.org>
Reviewed-by: Peter Thatcher <pthatcher@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20661}