Properly handle different transports having different SSL roles.

talk/app/webrtc/webrtcsession.h

 /*
  * libjingle
  * Copyright 2012 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 186 matching lines @@
     return video_channel_.get();
   }
   virtual cricket::DataChannel* data_channel() {
     return data_channel_.get();
   }
 
   void SetSdesPolicy(cricket::SecurePolicy secure_policy);
   cricket::SecurePolicy SdesPolicy() const;
 
   // Get current ssl role from transport.
-  bool GetSslRole(rtc::SSLRole* role);
+  bool GetSslRole(const std::string& transport_name, rtc::SSLRole* role);
+
+  // Get current SSL role for this channel's transport.
+  // If |transport| is null, returns false.
+  bool GetSslRole(const cricket::BaseChannel* channel, rtc::SSLRole* role);
 
   void CreateOffer(
       CreateSessionDescriptionObserver* observer,
       const PeerConnectionInterface::RTCOfferAnswerOptions& options,
       const cricket::MediaSessionOptions& session_options);
   void CreateAnswer(CreateSessionDescriptionObserver* observer,
                     const MediaConstraintsInterface* constraints,
                     const cricket::MediaSessionOptions& session_options);
   // The ownership of |desc| will be transferred after this call.
   bool SetLocalDescription(SessionDescriptionInterface* desc,
@@ skipping 292 matching lines @@
   PeerConnectionInterface::BundlePolicy bundle_policy_;
 
   // Declares the RTCP mux policy for the WebRTCSession.
   PeerConnectionInterface::RtcpMuxPolicy rtcp_mux_policy_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(WebRtcSession);
 };
 }  // namespace webrtc
 
 #endif  // TALK_APP_WEBRTC_WEBRTCSESSION_H_