Added DtlsCertificate, a ref counted object owning an SSLIdentity

webrtc/base/sslstreamadapterhelper.cc

Index: webrtc/base/sslstreamadapterhelper.cc
diff --git a/webrtc/base/sslstreamadapterhelper.cc b/webrtc/base/sslstreamadapterhelper.cc
index c3be4ea6845456b46fdbc1ea111affd49f2a2eef..97f959bdf383f3337bbc34b74a3eb4daaf3ea919 100644
--- a/webrtc/base/sslstreamadapterhelper.cc
+++ b/webrtc/base/sslstreamadapterhelper.cc
@@ -34,9 +34,10 @@ SSLStreamAdapterHelper::SSLStreamAdapterHelper(StreamInterface* stream)
 
 SSLStreamAdapterHelper::~SSLStreamAdapterHelper() = default;
 
-void SSLStreamAdapterHelper::SetIdentity(SSLIdentity* identity) {
-  ASSERT(identity_.get() == NULL);
-  identity_.reset(identity);
+void SSLStreamAdapterHelper::SetCertificate(
+    const scoped_refptr<webrtc::DtlsCertificate>& dtlscert) {
+  ASSERT(!dtlscertificate_.get());
+  dtlscertificate_ = dtlscert;
 }
 
 void SSLStreamAdapterHelper::SetServerRole(SSLRole role) {