Change WebRTC SslCipher to be exposed as number only.

webrtc/p2p/base/p2ptransportchannel.h

Index: webrtc/p2p/base/p2ptransportchannel.h
diff --git a/webrtc/p2p/base/p2ptransportchannel.h b/webrtc/p2p/base/p2ptransportchannel.h
index 3f7b696002b63ba73c32e29f5e06034215b4b3ad..133a9830c517ae7b76767d78a8b7018865250c8d 100644
--- a/webrtc/p2p/base/p2ptransportchannel.h
+++ b/webrtc/p2p/base/p2ptransportchannel.h
@@ -111,10 +111,10 @@ class P2PTransportChannel : public TransportChannelImpl,
   }
 
   // Find out which DTLS-SRTP cipher was negotiated.
-  bool GetSrtpCipher(std::string* cipher) override { return false; }
+  bool GetSrtpCipherByRfcName(std::string* cipher) override { return false; }
 
   // Find out which DTLS cipher was negotiated.
-  bool GetSslCipher(std::string* cipher) override { return false; }
+  bool GetSslCipher(uint16_t* cipher) override { return false; }
 
   // Returns null because the channel is not encrypted by default.
   rtc::scoped_refptr<rtc::RTCCertificate> GetLocalCertificate() const override {