Properly handle different transports having different SSL roles.

webrtc/p2p/base/transportcontroller.h

Index: webrtc/p2p/base/transportcontroller.h
diff --git a/webrtc/p2p/base/transportcontroller.h b/webrtc/p2p/base/transportcontroller.h
index 8d57b460e80c001821dda6cec6e7ae0c2d3c0d85..e26f3b5f17c17bd95972a61c2ed715c46bef176b 100644
--- a/webrtc/p2p/base/transportcontroller.h
+++ b/webrtc/p2p/base/transportcontroller.h
@@ -48,11 +48,7 @@ class TransportController : public sigslot::has_slots<>,
   void SetIceConfig(const IceConfig& config);
   void SetIceRole(IceRole ice_role);
 
-  // TODO(deadbeef) - Return role of each transport, as role may differ from
-  // one another.
-  // In current implementaion we just return the role of the first transport
-  // alphabetically.
-  bool GetSslRole(rtc::SSLRole* role);
+  bool GetSslRole(const std::string& transport_name, rtc::SSLRole* role);
 
   // Specifies the identity to use in this session.
   // Can only be called once.
@@ -160,7 +156,7 @@ class TransportController : public sigslot::has_slots<>,
   bool SetSslMaxProtocolVersion_w(rtc::SSLProtocolVersion version);
   void SetIceConfig_w(const IceConfig& config);
   void SetIceRole_w(IceRole ice_role);
-  bool GetSslRole_w(rtc::SSLRole* role);
+  bool GetSslRole_w(const std::string& transport_name, rtc::SSLRole* role);
   bool SetLocalCertificate_w(
       const rtc::scoped_refptr<rtc::RTCCertificate>& certificate);
   bool GetLocalCertificate_w(