Replace SSLProtocolNegotiation histogram with SSLNegotiatedAlpnProtocol.

net/socket/ssl_client_socket_impl.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_IMPL_H_
 #define NET_SOCKET_SSL_CLIENT_SOCKET_IMPL_H_
 
 #include <openssl/base.h>
 #include <openssl/ssl.h>
 #include <stddef.h>
@@ skipping 222 matching lines @@
 
   int TokenBindingAdd(const uint8_t** out,
                       size_t* out_len,
                       int* out_alert_value);
   int TokenBindingParse(const uint8_t* contents,
                         size_t contents_len,
                         int* out_alert_value);
 
   void LogConnectEndEvent(int rv);
 
-  // Record which TLS extension was used to negotiate protocol and protocol
-  // chosen in a UMA histogram.
-  void RecordNegotiationExtension() const;
+  // Record whether ALPN was used, and if so, the negotiated protocol,
+  // in a UMA histogram.
+  void RecordNegotiatedProtocol() const;
 
   // Records histograms for channel id support during full handshakes - resumed
   // handshakes are ignored.
   void RecordChannelIDSupport() const;
 
   // Returns whether TLS channel ID is enabled.
   bool IsChannelIDEnabled() const;
 
   bool transport_send_busy_;
   bool transport_recv_busy_;
@@ skipping 128 matching lines @@
   // True if PKP is bypassed due to a local trust anchor.
   bool pkp_bypassed_;
 
   BoundNetLog net_log_;
   base::WeakPtrFactory<SSLClientSocketImpl> weak_factory_;
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_CLIENT_SOCKET_IMPL_H_