Reset the BWE when the network changes

webrtc/p2p/base/dtlstransportchannel.h

Index: webrtc/p2p/base/dtlstransportchannel.h
diff --git a/webrtc/p2p/base/dtlstransportchannel.h b/webrtc/p2p/base/dtlstransportchannel.h
index a58b1a0f6b8de695cbe1ce5c5192b50a74f8ccf4..18fad442e4d4345f922fced06a9388a3f7933f43 100644
--- a/webrtc/p2p/base/dtlstransportchannel.h
+++ b/webrtc/p2p/base/dtlstransportchannel.h
@@ -216,6 +216,8 @@ class DtlsTransportChannelWrapper : public TransportChannelImpl {
                            const Candidates& candidates);
   void OnRoleConflict(TransportChannelImpl* channel);
   void OnRouteChange(TransportChannel* channel, const Candidate& candidate);
+  void OnBestConnectionChanged(TransportChannel* channel,
+                               Connection* best_connection);

[pthatcher1, 2016/03/24 18:46:37]

I think we should move away from calling these "best connection"s and toward
calling them "selected connection"s, or even "selected candidate pair"s. 

Can you call this OnSelectedConnectionChanged?  And then call it
selected_connection?

[honghaiz3, 2016/03/24 22:37:12]

Done.

   void OnConnectionRemoved(TransportChannelImpl* channel);
   void Reconnect();