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

net/socket/ssl_client_socket_mac.cc

 // 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.
 
 #include "net/socket/ssl_client_socket_mac.h"
 
 #include <CoreServices/CoreServices.h>
 #include <netdb.h>
 #include <sys/socket.h>
 #include <sys/types.h>
@@ skipping 771 matching lines @@
 }
 
 int SSLClientSocketMac::ExportKeyingMaterial(const base::StringPiece& label,
                                              bool has_context,
                                              const base::StringPiece& context,
                                              unsigned char* out,
                                              unsigned int outlen) {
   return ERR_NOT_IMPLEMENTED;
 }
 
+int SSLClientSocketOpenSSL::GetTLSUniqueChannelBinding(std::string* out) {
+  return ERR_NOT_IMPLEMENTED;
+}
+
 SSLClientSocket::NextProtoStatus
 SSLClientSocketMac::GetNextProto(std::string* proto,
                                  std::string* server_protos) {
   proto->clear();
   server_protos->clear();
   return kNextProtoUnsupported;
 }
 
 ServerBoundCertService* SSLClientSocketMac::GetServerBoundCertService() const {
   return NULL;
@@ skipping 641 matching lines @@
   if (rv < 0 && rv != ERR_IO_PENDING) {
     us->write_io_buf_ = NULL;
     return OSStatusFromNetError(rv);
   }
 
   // always lie to our caller
   return noErr;
 }
 
 }  // namespace net