Add a new GetNegotiatedProtocol method to StreamSocket and implement in all subclasses.

net/socket/ssl_server_socket_nss.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_SERVER_SOCKET_NSS_H_
 #define NET_SOCKET_SSL_SERVER_SOCKET_NSS_H_
 #pragma once
 
 #include <certt.h>
 #include <keyt.h>
@@ skipping 43 matching lines @@
   virtual bool IsConnectedAndIdle() const OVERRIDE;
   virtual int GetPeerAddress(AddressList* address) const OVERRIDE;
   virtual int GetLocalAddress(IPEndPoint* address) const OVERRIDE;
   virtual const BoundNetLog& NetLog() const OVERRIDE;
   virtual void SetSubresourceSpeculation() OVERRIDE;
   virtual void SetOmniboxSpeculation() OVERRIDE;
   virtual bool WasEverUsed() const OVERRIDE;
   virtual bool UsingTCPFastOpen() const OVERRIDE;
   virtual int64 NumBytesRead() const OVERRIDE;
   virtual base::TimeDelta GetConnectTimeMicros() const OVERRIDE;
+  virtual NextProto GetNegotiatedProtocol() const OVERRIDE;
 
  private:
   enum State {
     STATE_NONE,
     STATE_HANDSHAKE,
   };
 
   int InitializeSSLOptions();
 
   void OnSendComplete(int result);
@@ skipping 64 matching lines @@
 
   State next_handshake_state_;
   bool completed_handshake_;
 
   DISALLOW_COPY_AND_ASSIGN(SSLServerSocketNSS);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_SERVER_SOCKET_NSS_H_