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 9f6c563b62fe11c9687f5b99f8bb2929bee9ced9..19823f8c346d9c922b1f77fce1e614464b2f34ee 100644
--- a/webrtc/p2p/base/dtlstransportchannel.h
+++ b/webrtc/p2p/base/dtlstransportchannel.h
@@ -163,13 +163,11 @@ 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);
   }
-  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);