mprotect system call exposed to the untrusted code.

src/untrusted/irt/irt.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.
 
 {
   'includes': [
     '../../../build/common.gypi',
   ],
   'variables': {
     'irt_sources': [
@@ skipping 10 matching lines @@
       'irt_dyncode.c',
       'irt_thread.c',
       'irt_mutex.c',
       'irt_cond.c',
       'irt_sem.c',
       'irt_tls.c',
       'irt_blockhook.c',
       'irt_clock.c',
       'irt_dev_getpid.c',
       'irt_dev_exception_handling.c',
+      'irt_dev_mprotect.c',
       'irt_nameservice.c',
       'irt_random.c',
 # support_srcs
       # We also get nc_init_private.c, nc_thread.c and nc_tsd.c via
       # #includes of .c files.
       '../pthread/nc_mutex.c',
       '../pthread/nc_condvar.c',
       '../pthread/nc_token.c',
       '../nacl/sys_private.c',
       '../valgrind/dynamic_annotations.c',
@@ skipping 78 matching lines @@
           ],
         }],
       ],
       'dependencies': [
         '<(DEPTH)/native_client/tools.gyp:prep_toolchain',
         '<(DEPTH)/native_client/src/untrusted/nacl/nacl.gyp:nacl_lib_newlib',
       ],
     },
   ],
 }