tree 13656e028aa3fa3d81139fb14302c6812840ed72
parent 620d9c919504d9d7af94366fa22730f139a991db
author Zhi Huang <zhihuang@webrtc.org> 1510608367 -0800
committer Commit Bot <commit-bot@chromium.org> 1510613411 +0000

Reland: Replaced the SignalSelectedCandidatePairChanged with a new signal.

|packet_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.

TBR=pthatcher@webrtc.org

Bug: webrtc:7013
Change-Id: If9928b25a7259544c2d9c42048b53ab24292fc67
Reviewed-on: https://webrtc-review.googlesource.com/22767
Reviewed-by: Zhi Huang <zhihuang@webrtc.org>
Commit-Queue: Zhi Huang <zhihuang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20664}