POSIX: don't spawn zombies.

chrome/chrome.gyp

 # Copyright (c) 2009 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': [
     '../build/common.gypi',
@@ skipping 232 matching lines @@
         'common/platform_util_mac.mm',
         'common/platform_util_win.cc',
         'common/plugin_messages.h',
         'common/plugin_messages_internal.h',
         'common/pref_member.cc',
         'common/pref_member.h',
         'common/pref_names.cc',
         'common/pref_names.h',
         'common/pref_service.cc',
         'common/pref_service.h',
-        'common/process_watcher.cc',
+        'common/process_watcher_posix.cc',
+        'common/process_watcher_win.cc',
         'common/process_watcher.h',
         'common/property_bag.cc',
         'common/property_bag.h',
         'common/quarantine_mac.h',
         'common/quarantine_mac.mm',
         'common/ref_counted_util.h',
         'common/render_messages.h',
         'common/render_messages_internal.h',
         'common/resource_bundle.cc',
         'common/resource_bundle.h',
@@ skipping 77 matching lines @@
             'common/temp_scaffolding_stubs.cc',
             'common/temp_scaffolding_stubs.h',
           ],
         }, { # else: OS != "win"
           'sources!': [
             'common/gfx/emf.cc',
             'common/gfx/icon_util.cc',
             'common/classfactory.cc',
             'common/drag_drop_types.cc',
             'common/os_exchange_data.cc',
-            'common/process_watcher.cc',
           ],
         }],
       ],
     },
     {
       'target_name': 'browser',
       'type': '<(library)',
       'dependencies': [
         'common',
         'resources',
@@ skipping 2633 matching lines @@
                           '../tools/code_coverage/coverage_posix.py',
                           '--directory',
                           '<(PRODUCT_DIR)' ],
             },
           ],  # 'actions'
         },
       ]
     }],
   ],  # 'conditions'
 }