Added DtlsCertificate, a ref counted object owning an SSLIdentity

webrtc/base/sslstreamadapterhelper.h

Index: webrtc/base/sslstreamadapterhelper.h
diff --git a/webrtc/base/sslstreamadapterhelper.h b/webrtc/base/sslstreamadapterhelper.h
index a28dba4deaeb72508a5f2abb6b7ad01a2845c65d..05f70fb7d9c96216b3c54fcaa4bbcb8bf0eb2f36 100644
--- a/webrtc/base/sslstreamadapterhelper.h
+++ b/webrtc/base/sslstreamadapterhelper.h
@@ -30,7 +30,8 @@ class SSLStreamAdapterHelper : public SSLStreamAdapter {
   ~SSLStreamAdapterHelper() override;
 
   // Overrides of SSLStreamAdapter
-  void SetIdentity(SSLIdentity* identity) override;
+  void SetCertificate(
+      const rtc::scoped_refptr<webrtc::DtlsCertificate>& dtlscert) override;
   void SetServerRole(SSLRole role = SSL_SERVER) override;
   void SetMode(SSLMode mode) override;
   void SetMaxProtocolVersion(SSLProtocolVersion version) override;
@@ -87,8 +88,8 @@ class SSLStreamAdapterHelper : public SSLStreamAdapter {
   SSLRole role_;
   int ssl_error_code_;  // valid when state_ == SSL_ERROR
 
-  // Our key and certificate, mostly useful in peer-to-peer mode.
-  scoped_ptr<SSLIdentity> identity_;
+  // Contains our key and certificate, mostly useful in peer-to-peer mode.
+  scoped_refptr<webrtc::DtlsCertificate> dtlscertificate_;
   // in traditional mode, the server name that the server's certificate
   // must specify. Empty in peer-to-peer mode.
   std::string ssl_server_name_;