Change WebRTC SslCipher to be exposed as number only.

webrtc/p2p/base/transport.h

Index: webrtc/p2p/base/transport.h
diff --git a/webrtc/p2p/base/transport.h b/webrtc/p2p/base/transport.h
index 72a089501e6007d51c61be121efbef1e1178fa25..609423229032759247adeaffc6d63c3b6a412bbc 100644
--- a/webrtc/p2p/base/transport.h
+++ b/webrtc/p2p/base/transport.h
@@ -115,7 +115,7 @@ struct TransportChannelStats {
   int component;
   ConnectionInfos connection_infos;
   std::string srtp_cipher;
-  std::string ssl_cipher;
+  rtc::SslCipher ssl_cipher;
 };
 
 // Information about all the channels of a transport.