Added DtlsCertificate, a ref counted object owning an SSLIdentity

talk/app/webrtc/peerconnectioninterface.h

Index: talk/app/webrtc/peerconnectioninterface.h
diff --git a/talk/app/webrtc/peerconnectioninterface.h b/talk/app/webrtc/peerconnectioninterface.h
index 946b1253c99bfca3ce1bd508a0973f6f437e83d6..6dda4fbe8ae1391d0845bd79418bbd6cb3f164f9 100644
--- a/talk/app/webrtc/peerconnectioninterface.h
+++ b/talk/app/webrtc/peerconnectioninterface.h
@@ -72,6 +72,7 @@
 #include <vector>
 
 #include "talk/app/webrtc/datachannelinterface.h"
+#include "talk/app/webrtc/dtlscertificate.h"
 #include "talk/app/webrtc/dtlsidentitystore.h"
 #include "talk/app/webrtc/dtmfsenderinterface.h"
 #include "talk/app/webrtc/jsep.h"
@@ -535,6 +536,7 @@ class PeerConnectionFactoryInterface : public rtc::RefCountInterface {
 
   // TODO(hbos): Temporary CreatePeerConnection function while we transition
   // from DTLSIdentityServiceInterface to DtlsIdentityStoreInterface.
+  // This method takes the ownership of |dtls_identity_service|.
   rtc::scoped_refptr<PeerConnectionInterface>
       CreatePeerConnection(
           const PeerConnectionInterface::RTCConfiguration& configuration,
@@ -547,6 +549,9 @@ class PeerConnectionFactoryInterface : public rtc::RefCountInterface {
                                 dtls_identity_service, observer);
   }
 
+  // If a |dtls_identity_service| is provided it will be used for
+  // SSLIdentity/DtlsCertificate generation, otherwise a default service will be
+  // used.
   // This method takes the ownership of |dtls_identity_service|.
   virtual rtc::scoped_refptr<PeerConnectionInterface>
       CreatePeerConnection(
@@ -556,6 +561,17 @@ class PeerConnectionFactoryInterface : public rtc::RefCountInterface {
           DTLSIdentityServiceInterface* dtls_identity_service,
           PeerConnectionObserver* observer) = 0;
 
+  // With the |certificate| already generated, this version of
+  // CreatePeerConnection can skip the need to generate
+  // SSLIdentity/DtlsCertificate. |certificate| must not be a null reference.
+  virtual rtc::scoped_refptr<PeerConnectionInterface>
+      CreatePeerConnection(
+          const PeerConnectionInterface::RTCConfiguration& configuration,
+          const MediaConstraintsInterface* constraints,
+          PortAllocatorFactoryInterface* allocator_factory,
+          rtc::scoped_refptr<DtlsCertificate> certificate,
+          PeerConnectionObserver* observer) = 0;
+
   // TODO(mallinath) : Remove below versions after clients are updated
   // to above method.
   // In latest W3C WebRTC draft, PC constructor will take RTCConfiguration,