Added DtlsCertificate, a ref counted object owning an SSLIdentity

webrtc/p2p/base/transportchannelproxy.h

Index: webrtc/p2p/base/transportchannelproxy.h
diff --git a/webrtc/p2p/base/transportchannelproxy.h b/webrtc/p2p/base/transportchannelproxy.h
index 3a69bccb4c0a818f9b4a654624a05e58e86efb6c..dff0f33cb7be7e50c9e33389022e60096c395f04 100644
--- a/webrtc/p2p/base/transportchannelproxy.h
+++ b/webrtc/p2p/base/transportchannelproxy.h
@@ -60,7 +60,8 @@ class TransportChannelProxy : public TransportChannel,
   virtual bool SetSrtpCiphers(const std::vector<std::string>& ciphers);
   virtual bool GetSrtpCipher(std::string* cipher);
   virtual bool GetSslCipher(std::string* cipher);
-  virtual bool GetLocalIdentity(rtc::SSLIdentity** identity) const;
+  bool GetLocalCertificate(
+      rtc::scoped_refptr<webrtc::DtlsCertificate>* certificate) const override;
   virtual bool GetRemoteCertificate(rtc::SSLCertificate** cert) const;
   virtual bool ExportKeyingMaterial(const std::string& label,
                             const uint8* context,