Added DtlsCertificate, a ref counted object owning an SSLIdentity

webrtc/base/opensslstreamadapter.h

Index: webrtc/base/opensslstreamadapter.h
diff --git a/webrtc/base/opensslstreamadapter.h b/webrtc/base/opensslstreamadapter.h
index 5cad3a192041d62478e70e232c35690cac3f496f..1a2227d70cd4eddb34231dce829e8f8e21de980b 100644
--- a/webrtc/base/opensslstreamadapter.h
+++ b/webrtc/base/opensslstreamadapter.h
@@ -61,7 +61,8 @@ class OpenSSLStreamAdapter : public SSLStreamAdapter {
   explicit OpenSSLStreamAdapter(StreamInterface* stream);
   ~OpenSSLStreamAdapter() override;
 
-  void SetIdentity(SSLIdentity* identity) override;
+  void SetCertificate(
+      const scoped_refptr<webrtc::DtlsCertificate>& certificate) override;
 
   // Default argument is for compatibility
   void SetServerRole(SSLRole role = SSL_SERVER) override;
@@ -181,8 +182,8 @@ class OpenSSLStreamAdapter : public SSLStreamAdapter {
   SSL* ssl_;
   SSL_CTX* ssl_ctx_;
 
-  // Our key and certificate, mostly useful in peer-to-peer mode.
-  scoped_ptr<OpenSSLIdentity> identity_;
+  // Contains our key and certificate, mostly useful in peer-to-peer mode.
+  scoped_refptr<webrtc::DtlsCertificate> certificate_;
   // in traditional mode, the server name that the server's certificate
   // must specify. Empty in peer-to-peer mode.
   std::string ssl_server_name_;