Remove GetTLSUniqueChannelBinding.

net/socket/ssl_client_socket_nss.cc

Index: net/socket/ssl_client_socket_nss.cc
diff --git a/net/socket/ssl_client_socket_nss.cc b/net/socket/ssl_client_socket_nss.cc
index 1501c76a651746412cdc345d784750f215e6edb4..135045ff9feae081b66dbef64eccdb2acd11fe42 100644
--- a/net/socket/ssl_client_socket_nss.cc
+++ b/net/socket/ssl_client_socket_nss.cc
@@ -2485,22 +2485,6 @@ int SSLClientSocketNSS::ExportKeyingMaterial(const base::StringPiece& label,
   return OK;
 }
 
-int SSLClientSocketNSS::GetTLSUniqueChannelBinding(std::string* out) {
-  if (!IsConnected())
-    return ERR_SOCKET_NOT_CONNECTED;
-  unsigned char buf[64];
-  unsigned int len;
-  SECStatus result = SSL_GetChannelBinding(nss_fd_,
-                                           SSL_CHANNEL_BINDING_TLS_UNIQUE,
-                                           buf, &len, arraysize(buf));
-  if (result != SECSuccess) {
-    LogFailedNSSFunction(net_log_, "SSL_GetChannelBinding", "");
-    return MapNSSError(PORT_GetError());
-  }
-  out->assign(reinterpret_cast<char*>(buf), len);
-  return OK;
-}
-
 SSLClientSocket::NextProtoStatus SSLClientSocketNSS::GetNextProto(
     std::string* proto) const {
   *proto = core_->state().next_proto;