Fix a sandbox linker error.

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 118 matching lines @@
             'src/window.h',
         ],
       }],
     ],
   },
   'conditions': [
     [ 'OS!="win" and OS!="mac"', {
       'targets': [
         {
           'target_name': 'sandbox',
-          'type': 'static_library',
+          'type': 'settings',
           'conditions': [
             # Only compile in the seccomp code for the flag combination
             # where we support it.
             [ 'OS=="linux" and target_arch!="arm" and toolkit_views==0 and selinux==0', {
               'dependencies': [
                 '../seccompsandbox/seccomp.gyp:seccomp_sandbox',
               ],
             }],
           ],
         },
@@ skipping 223 matching lines @@
             'POCDLL_EXPORTS',
           ],
           'include_dirs': [
             '..',
           ],
         },
       ],
     }],
   ],
 }