Add signaling to support ICE renomination.

webrtc/p2p/base/transportdescriptionfactory.h

Index: webrtc/p2p/base/transportdescriptionfactory.h
diff --git a/webrtc/p2p/base/transportdescriptionfactory.h b/webrtc/p2p/base/transportdescriptionfactory.h
index 828aa6d22c4f2fae6b0b7d233d2209d3095b9642..0cf478aa089001c17162b42af29305e841213c92 100644
--- a/webrtc/p2p/base/transportdescriptionfactory.h
+++ b/webrtc/p2p/base/transportdescriptionfactory.h
@@ -21,9 +21,10 @@ class SSLIdentity;
 namespace cricket {
 
 struct TransportOptions {
-  TransportOptions() : ice_restart(false), prefer_passive_role(false) {}
-  bool ice_restart;
-  bool prefer_passive_role;
+  bool ice_restart = false;
+  bool prefer_passive_role = false;
+  // This tells the remote side that we supports ICE renomination.
+  bool ice_renomination = true;

[pthatcher1, 2016/08/08 21:56:23]

I think we should make this false like  use_renomination_if_remote_supports, and
make both true if the application opts into it (and later make the default of
both true, and not allow opt-out).

[honghaiz3, 2016/08/11 04:57:58]

Done.

 };
 
 // Creates transport descriptions according to the supplied configuration.