Add a dedicated SSL protocol version metric.

net/socket/ssl_client_socket.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_SOCKET_SSL_CLIENT_SOCKET_H_
 #define NET_SOCKET_SSL_CLIENT_SOCKET_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 183 matching lines @@
       bool stapled_ocsp_response_received);
 
   // Records histograms for channel id support during full handshakes - resumed
   // handshakes are ignored.
   static void RecordChannelIDSupport(
       ChannelIDService* channel_id_service,
       bool negotiated_channel_id,
       bool channel_id_enabled,
       bool supports_ecc);
 
-  // Records ConnectionType histograms for a successful SSL connection.
-  static void RecordConnectionTypeMetrics(int ssl_version);
-
   // Returns whether TLS channel ID is enabled.
   static bool IsChannelIDEnabled(
       const SSLConfig& ssl_config,
       ChannelIDService* channel_id_service);
 
   // Determine if there is at least one enabled cipher suite that satisfies
   // Section 9.2 of the HTTP/2 specification.  Note that the server might still
   // pick an inadequate cipher suite.
   static bool HasCipherAdequateForHTTP2(
       const std::vector<uint16>& cipher_suites);
@@ skipping 41 matching lines @@
   bool signed_cert_timestamps_received_;
   // True if a stapled OCSP response was received.
   bool stapled_ocsp_response_received_;
   // Protocol negotiation extension used.
   SSLNegotiationExtension negotiation_extension_;
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_CLIENT_SOCKET_H_