Add a new GetTlsUniqueChannelBinding method to SSLSocket, and implement nss version.

net/socket/ssl_client_socket_mac.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_MAC_H_
 #define NET_SOCKET_SSL_CLIENT_SOCKET_MAC_H_
 
 #include <Security/Security.h>
 
 #include <string>
@@ skipping 21 matching lines @@
   // in the server's certificate during the SSL handshake.  If SSL client
   // authentication is requested, the host_and_port field of SSLCertRequestInfo
   // will be populated with |host_and_port|.  |ssl_config| specifies
   // the SSL settings.
   SSLClientSocketMac(ClientSocketHandle* transport_socket,
                      const HostPortPair& host_and_port,
                      const SSLConfig& ssl_config,
                      const SSLClientSocketContext& context);
   virtual ~SSLClientSocketMac();
 
-  // SSLClientSocket implementation.
-  virtual void GetSSLCertRequestInfo(
-      SSLCertRequestInfo* cert_request_info) OVERRIDE;
+  // SSLSocket implementation.
   virtual int ExportKeyingMaterial(const base::StringPiece& label,
                                    bool has_context,
                                    const base::StringPiece& context,
                                    unsigned char* out,
                                    unsigned int outlen) OVERRIDE;
+  virtual int GetTlsUniqueChannelBinding(unsigned char* out,
+                                         unsigned int *outlen,
+                                         unsigned int outlen_max) OVERRIDE;
+
+  // SSLClientSocket implementation.
+  virtual void GetSSLCertRequestInfo(
+      SSLCertRequestInfo* cert_request_info) OVERRIDE;
   virtual NextProtoStatus GetNextProto(std::string* proto,
                                        std::string* server_protos) OVERRIDE;
   virtual ServerBoundCertService* GetServerBoundCertService() const OVERRIDE;
 
   // StreamSocket implementation.
   virtual int Connect(const CompletionCallback& callback) OVERRIDE;
   virtual void Disconnect() OVERRIDE;
   virtual bool IsConnected() const OVERRIDE;
   virtual bool IsConnectedAndIdle() const OVERRIDE;
   virtual int GetPeerAddress(IPEndPoint* address) const OVERRIDE;
@@ skipping 112 matching lines @@
   // These are the IOBuffers used for operations on the underlying transport.
   scoped_refptr<IOBuffer> read_io_buf_;
   scoped_refptr<IOBuffer> write_io_buf_;
 
   BoundNetLog net_log_;
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_CLIENT_SOCKET_MAC_H_