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 021234709dc2983af631f81db01df8db4ac18de5..6e2c950e22c0d956ff6dd5b687bb807746475297 100644
--- a/talk/app/webrtc/statscollector.cc
+++ b/talk/app/webrtc/statscollector.cc
@@ -734,10 +734,12 @@ void StatsCollector::ExtractSessionInfo() {
         channel_report->AddString(StatsReport::kStatsValueNameSrtpCipher,
                                   srtp_cipher);
       }
-      const std::string& ssl_cipher = channel_iter.ssl_cipher;
-      if (!ssl_cipher.empty()) {
-        channel_report->AddString(StatsReport::kStatsValueNameDtlsCipher,
-                                  ssl_cipher);
+      uint16_t ssl_cipher = channel_iter.ssl_cipher;
+      if (ssl_cipher &&
+          rtc::SSLStreamAdapter::GetSslCipherSuiteName(ssl_cipher).length()) {
+        channel_report->AddString(
+            StatsReport::kStatsValueNameDtlsCipher,
+            rtc::SSLStreamAdapter::GetSslCipherSuiteName(ssl_cipher));
       }
 
       int connection_id = 0;