Extract CreateInitProcessReaper() from the Zygote.

sandbox/linux/sandbox_linux.gypi

 # 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': {
     'conditions': [
       ['OS=="linux"', {
         'compile_suid_client': 1,
         'compile_credentials': 1,
@@ skipping 154 matching lines @@
       ],
       'include_dirs': [
         '../..',
       ],
     },
     { 'target_name': 'sandbox_services',
       'type': 'static_library',
       'sources': [
         'services/broker_process.cc',
         'services/broker_process.h',
+        'services/init_process_reaper.cc',
+        'services/init_process_reaper.h',
       ],
       'dependencies': [
         '../base/base.gyp:base',
       ],
       'conditions': [
         ['compile_credentials==1', {
           'sources': [
             'services/credentials.cc',
             'services/credentials.h',
           ],
@@ skipping 42 matching lines @@
       'target_name': 'suid_sandbox_client',
       'type': 'static_library',
       'sources': [
         'suid/common/sandbox.h',
         'suid/common/suid_unsafe_environment_variables.h',
         'suid/client/setuid_sandbox_client.cc',
         'suid/client/setuid_sandbox_client.h',
       ],
       'dependencies': [
         '../base/base.gyp:base',
+        'sandbox_services',
       ],
       'include_dirs': [
         '..',
       ],
     },
   ],
   'conditions': [
     # Strategy copied from base_unittests_apk in base/base.gyp.
     [ 'OS=="android" and gtest_target_type == "shared_library"', {
       'targets': [
         {
         'target_name': 'sandbox_linux_jni_unittests_apk',
         'type': 'none',
         'variables': {
           'test_suite_name': 'sandbox_linux_jni_unittests',
           'input_shlib_path':
               '<(SHARED_LIB_DIR)/<(SHARED_LIB_PREFIX)'
               'sandbox_linux_jni_unittests'
               '<(SHARED_LIB_SUFFIX)',
         },
         'dependencies': [
           'sandbox_linux_jni_unittests',
         ],
         'includes': [ '../../build/apk_test.gypi' ],
         }
       ],
     }],
   ],
 }