Added DtlsCertificate, a ref counted object owning an SSLIdentity

webrtc/p2p/base/rawtransportchannel.h

Index: webrtc/p2p/base/rawtransportchannel.h
diff --git a/webrtc/p2p/base/rawtransportchannel.h b/webrtc/p2p/base/rawtransportchannel.h
index 75b494e65a0f1818753fdff657af09d1677e4403..827390b33e2429b5eea20d6cfe93a952e8306b73 100644
--- a/webrtc/p2p/base/rawtransportchannel.h
+++ b/webrtc/p2p/base/rawtransportchannel.h
@@ -125,7 +125,8 @@ class RawTransportChannel : public TransportChannelImpl,
   }
 
   // Returns false because the channel is not DTLS.
-  virtual bool GetLocalIdentity(rtc::SSLIdentity** identity) const {
+  bool GetLocalCertificate(
+      rtc::scoped_refptr<webrtc::DtlsCertificate>* certificate) const override {
     return false;
   }
 
@@ -144,7 +145,8 @@ class RawTransportChannel : public TransportChannelImpl,
     return false;
   }
 
-  virtual bool SetLocalIdentity(rtc::SSLIdentity* identity) {
+  bool SetLocalCertificate(
+      rtc::scoped_refptr<webrtc::DtlsCertificate> certificate) override {
     return false;
   }