Properly handle different transports having different SSL roles.

talk/app/webrtc/webrtcsession.cc

Index: talk/app/webrtc/webrtcsession.cc
diff --git a/talk/app/webrtc/webrtcsession.cc b/talk/app/webrtc/webrtcsession.cc
index ec0456f7cb9f1f8743dabc4794f181353369f439..1e6c0a641178bf446cd138fd584c514360293009 100644
--- a/talk/app/webrtc/webrtcsession.cc
+++ b/talk/app/webrtc/webrtcsession.cc
@@ -763,14 +763,15 @@ cricket::SecurePolicy WebRtcSession::SdesPolicy() const {
   return webrtc_session_desc_factory_->SdesPolicy();
 }
 
-bool WebRtcSession::GetSslRole(rtc::SSLRole* role) {
+bool WebRtcSession::GetSslRole(const std::string& transport_name,
+                               rtc::SSLRole* role) {
   if (!local_desc_ || !remote_desc_) {
     LOG(LS_INFO) << "Local and Remote descriptions must be applied to get "
                  << "SSL Role of the session.";
     return false;
   }
 
-  return transport_controller_->GetSslRole(role);
+  return transport_controller_->GetSslRole(transport_name, role);
 }
 
 void WebRtcSession::CreateOffer(