Add a dedicated SSL protocol version metric.

net/socket/ssl_client_socket_nss.cc

Index: net/socket/ssl_client_socket_nss.cc
diff --git a/net/socket/ssl_client_socket_nss.cc b/net/socket/ssl_client_socket_nss.cc
index 011474fedca1a1ea5efd9c9270aa75566d58071c..79b2a8c7b8fa271574123661e631b546fc882708 100644
--- a/net/socket/ssl_client_socket_nss.cc
+++ b/net/socket/ssl_client_socket_nss.cc
@@ -3526,15 +3526,6 @@ int SSLClientSocketNSS::DoVerifyCertComplete(int result) {
   // purposes.  See https://bugzilla.mozilla.org/show_bug.cgi?id=508081 and
   // http://crbug.com/15630 for more info.
 
-  // TODO(hclam): Skip logging if server cert was expected to be bad because
-  // |server_cert_verify_result_| doesn't contain all the information about
-  // the cert.
-  if (result == OK) {
-    int ssl_version =
-        SSLConnectionStatusToVersion(core_->state().ssl_connection_status);
-    RecordConnectionTypeMetrics(ssl_version);
-  }
-
   const CertStatus cert_status = server_cert_verify_result_.cert_status;
   if (transport_security_state_ &&
       (result == OK ||