Replacing SSLIdentity* with scoped_refptr<RTCCertificate> in TransportChannel layer

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 9c14314135663d58d5edc6a3109cb2bf06c56859..7c0f58bb52a8a93b3331aeb686977a1a2e8c72c2 100644
--- a/webrtc/p2p/base/dtlstransportchannel.h
+++ b/webrtc/p2p/base/dtlstransportchannel.h
@@ -99,8 +99,10 @@ class DtlsTransportChannelWrapper : public TransportChannelImpl {
   virtual IceRole GetIceRole() const {
     return channel_->GetIceRole();
   }
-  virtual bool SetLocalIdentity(rtc::SSLIdentity *identity);
-  virtual bool GetLocalIdentity(rtc::SSLIdentity** identity) const;
+  bool SetLocalCertificate(
+      const rtc::scoped_refptr<rtc::RTCCertificate>& certificate) override;
+  bool GetLocalCertificate(
+      rtc::scoped_refptr<rtc::RTCCertificate>* certificate) const override;
 
   virtual bool SetRemoteFingerprint(const std::string& digest_alg,
                                     const uint8* digest,
@@ -147,7 +149,7 @@ class DtlsTransportChannelWrapper : public TransportChannelImpl {
 
   // Once DTLS has been established, this method retrieves the certificate in
   // use by the remote peer, for use in external identity verification.
-  virtual bool GetRemoteCertificate(rtc::SSLCertificate** cert) const;
+  bool GetRemoteSSLCertificate(rtc::SSLCertificate** cert) const override;
 
   // Once DTLS has established (i.e., this channel is writable), this method
   // extracts the keys negotiated during the DTLS handshake, for use in external
@@ -230,7 +232,7 @@ class DtlsTransportChannelWrapper : public TransportChannelImpl {
   StreamInterfaceChannel* downward_;  // Wrapper for channel_, owned by dtls_.
   std::vector<std::string> srtp_ciphers_;  // SRTP ciphers to use with DTLS.
   State dtls_state_;
-  rtc::SSLIdentity* local_identity_;
+  rtc::scoped_refptr<rtc::RTCCertificate> local_certificate_;
   rtc::SSLRole ssl_role_;
   rtc::SSLProtocolVersion ssl_max_version_;
   rtc::Buffer remote_fingerprint_value_;