Added DtlsCertificate, a ref counted object owning an SSLIdentity

talk/app/webrtc/peerconnection.cc

Index: talk/app/webrtc/peerconnection.cc
diff --git a/talk/app/webrtc/peerconnection.cc b/talk/app/webrtc/peerconnection.cc
index dba77da219df45c8c47709ceed5c7cc71a805d94..4c5a1bd8d832f9667805ac33c208c3dfd924f8e8 100644
--- a/talk/app/webrtc/peerconnection.cc
+++ b/talk/app/webrtc/peerconnection.cc
@@ -350,6 +350,7 @@ bool PeerConnection::Initialize(
     const MediaConstraintsInterface* constraints,
     PortAllocatorFactoryInterface* allocator_factory,
     DTLSIdentityServiceInterface* dtls_identity_service,
+    rtc::scoped_refptr<DtlsCertificate> certificate,
     PeerConnectionObserver* observer) {
   ASSERT(observer != NULL);
   if (!observer)
@@ -405,7 +406,7 @@ bool PeerConnection::Initialize(
 
   // Initialize the WebRtcSession. It creates transport channels etc.
   if (!session_->Initialize(factory_->options(), constraints,
-                            dtls_identity_service, configuration))
+                            dtls_identity_service, certificate, configuration))
     return false;
 
   // Register PeerConnection as receiver of local ice candidates.