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 bdbc6a7e38c1e92b07a8e7ee778166bdd2f39abb..39f20f8a246b3328b7911b0cbe172dba0c1ba286 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/dtlsidentitystore.h"
@@ -503,6 +504,9 @@ class PeerConnectionFactoryInterface : public rtc::RefCountInterface {
 
   virtual void SetOptions(const Options& options) = 0;
 
+  // If a |dtls_identity_store| is provided it will be used for
+  // SSLIdentity/DtlsCertificate generation, otherwise a default store will be
+  // used.
   virtual rtc::scoped_refptr<PeerConnectionInterface>
       CreatePeerConnection(
           const PeerConnectionInterface::RTCConfiguration& configuration,
@@ -511,6 +515,17 @@ class PeerConnectionFactoryInterface : public rtc::RefCountInterface {
           rtc::scoped_ptr<DtlsIdentityStoreInterface> dtls_identity_store,
           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,
+          const rtc::scoped_refptr<DtlsCertificate>& certificate,
+          PeerConnectionObserver* observer) = 0;
+
   // TODO(hbos): Remove below version after clients are updated to above method.
   // In latest W3C WebRTC draft, PC constructor will take RTCConfiguration,
   // and not IceServers. RTCConfiguration is made up of ice servers and