Change WebRTC SslCipher to be exposed as number only.

talk/app/webrtc/statscollector.cc

Index: talk/app/webrtc/statscollector.cc
diff --git a/talk/app/webrtc/statscollector.cc b/talk/app/webrtc/statscollector.cc
index 76ac76d7d2b953ff556039151373733d388bff2d..45a30904693eedb6142277752026b9370e9debc4 100644
--- a/talk/app/webrtc/statscollector.cc
+++ b/talk/app/webrtc/statscollector.cc
@@ -740,7 +740,7 @@ void StatsCollector::ExtractSessionInfo() {
         channel_report->AddString(StatsReport::kStatsValueNameSrtpCipher,
                                   srtp_cipher);
       }
-      const std::string& ssl_cipher = channel_iter.ssl_cipher;
+      const std::string& ssl_cipher = channel_iter.ssl_cipher.rfc_name;
       if (!ssl_cipher.empty()) {
         channel_report->AddString(StatsReport::kStatsValueNameDtlsCipher,
                                   ssl_cipher);