Add signaling to support ICE renomination.

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 7b8247a44903a5da6ac3535845f6f83a8c9678be..26ee7e1130adabf5f6844e1499b9f5d998486fd3 100644
--- a/webrtc/p2p/base/dtlstransportchannel.h
+++ b/webrtc/p2p/base/dtlstransportchannel.h
@@ -164,13 +164,11 @@ class DtlsTransportChannelWrapper : public TransportChannelImpl {
   void SetIceTiebreaker(uint64_t tiebreaker) override {
     channel_->SetIceTiebreaker(tiebreaker);
   }
-  void SetIceCredentials(const std::string& ice_ufrag,
-                         const std::string& ice_pwd) override {
-    channel_->SetIceCredentials(ice_ufrag, ice_pwd);
+  void SetIceParameters(const IceParameters& ice_params) override {
+    channel_->SetIceParameters(ice_params);

[Taylor Brandstetter, 2016/08/08 22:28:15]

I think the introduction of IceParameters is a great idea, since it matches an
ORTC struct:
http://ortc.org/wp-content/uploads/2016/03/ortc.html#idl-def-RTCIceParameters

But along those lines, it would make sense to put the ICE mode in this struct as
well. If not in this CL, could you add a TODO to do that?

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

Added TODO. I did not include in this CL because currently ICE mode is set from
a different path than ICE parameters. It is not obvious how to merge that two. 

   }
-  void SetRemoteIceCredentials(const std::string& ice_ufrag,
-                               const std::string& ice_pwd) override {
-    channel_->SetRemoteIceCredentials(ice_ufrag, ice_pwd);
+  void SetRemoteIceParameters(const IceParameters& ice_params) override {
+    channel_->SetRemoteIceParameters(ice_params);
   }
   void SetRemoteIceMode(IceMode mode) override {
     channel_->SetRemoteIceMode(mode);