Linux: fix scons build so that libssl gets the right headers.

net/socket/ssl_client_socket_nss.cc

 // Copyright (c) 2006-2009 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.
 
 // This file includes code SSLClientSocketNSS::DoVerifyCertComplete() derived
 // from AuthCertificateCallback() in
 // mozilla/security/manager/ssl/src/nsNSSCallbacks.cpp.
 
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
@@ skipping 294 matching lines @@
   if (rv != SECSuccess)
      LOG(INFO) << "SSL_ENABLE_SESSION_TICKETS failed.  Old system nss?";
 #else
   #error "You need to install NSS-3.12 or later to build chromium"
 #endif
 
 #ifdef SSL_ENABLE_DEFLATE
   rv = SSL_OptionSet(nss_fd_, SSL_ENABLE_DEFLATE, PR_TRUE);
   if (rv != SECSuccess)
      LOG(INFO) << "SSL_ENABLE_DEFLATE failed.  Old system nss?";
+#else
+#error This is a temporary hack to check that the builders are using the correct header files. It will be removed once a build has finished.
 #endif
 
 #ifdef SSL_NEXT_PROTO_NEGOTIATED
   if (!ssl_config_.next_protos.empty()) {
     rv = SSL_SetNextProtoNego(
        nss_fd_,
        reinterpret_cast<const unsigned char *>(ssl_config_.next_protos.data()),
        ssl_config_.next_protos.size());
     if (rv != SECSuccess)
        LOG(INFO) << "SSL_SetNextProtoNego failed.";
@@ skipping 831 matching lines @@
   }
   PRErrorCode prerr = PR_GetError();
   if (prerr == PR_WOULD_BLOCK_ERROR) {
     return ERR_IO_PENDING;
   }
   LeaveFunction("");
   return NetErrorFromNSPRError(prerr);
 }
 
 }  // namespace net