Demo: Build NamespaceSandbox::ForkInNewPidNamespace.

base/base_nacl.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     # base.gypi must be included before common_untrusted.gypi.
@@ skipping 77 matching lines @@
               # For MessageLoopForIO based on libevent.
               'message_loop/message_pump_libevent.cc',
               'message_loop/message_pump_libevent.h',
 
               # For UnixDomainSocket::SendMsg and RecvMsg.
               'posix/unix_domain_socket_linux.cc',
 
               # For GetKnownDeadTerminationStatus and GetTerminationStatus.
               'process/kill_posix.cc',
 
+              # For ForkWithFlags.
+              'process/launch_posix.cc',
+
               # Unlike libbase_nacl, for Non-SFI build, we need to use
               # rand_util_posix for random implementation, instead of
               # rand_util_nacl.cc, which is based on IRT. rand_util_nacl.cc is
               # excluded below.
               'rand_util_posix.cc',
 
               # For CancelableSyncSocket.
               'sync_socket_nacl.cc',
             ],
           },
           'sources!': [
             'rand_util_nacl.cc',
           ],
           'dependencies': [
             '../third_party/libevent/libevent_nacl_nonsfi.gyp:event_nacl_nonsfi',
           ],
         },
       ],
     }],
   ],
 }