Last gyp patch for cross-platform Unix support

sandbox/sandbox.gyp

 # Copyright (c) 2011 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,
   },
   'target_defaults': {
     'variables': {
@@ skipping 108 matching lines @@
             'src/win_utils.h',
             'src/win2k_threadpool.cc',
             'src/win2k_threadpool.h',
             'src/window.cc',
             'src/window.h',
         ],
       }],
     ],
   },
   'conditions': [
-    [ 'OS=="freebsd" or OS=="openbsd"', {
+    [ 'os_posix == 1 and OS != "mac" and OS != "linux"', {
       # GYP requires that each file have at least one target defined.
       'targets': [
         {
           'target_name': 'sandbox',
           'type': 'settings',
         },
       ],
     }],
     [ 'OS=="linux" and selinux==0 and clang==0', {
       'targets': [
@@ skipping 244 matching lines @@
       ],
     }],
   ],
 }
 
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