Monitor sleep/wake on Mac. Should fix some networking issues arising after sl...

app/app_base.gypi

 # Copyright (c) 2010 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.
 
 {
   'target_defaults': {
     'variables': {
       'app_base_target': 0,
     },
     'target_conditions': [
       # This part is shared between the targets defined below. Only files and
       # settings relevant for building the Win64 target should be added here.
       # All the rest should be added to the 'app_base' target below.
       ['app_base_target==1', {
         'sources': [
             # Used both for Chrome and for Win64 NaCl loader
             'app_paths.h',
             'app_paths.cc',
             'app_switches.h',
             'app_switches.cc',
             'hi_res_timer_manager_posix.cc',
             'hi_res_timer_manager_win.cc',
             'hi_res_timer_manager.h',
             'system_monitor.cc',
             'system_monitor.h',
+            'system_monitor_mac.mm',
             'system_monitor_posix.cc',
             'system_monitor_win.cc',
             'tree_model.h',
             'tree_node_iterator.h',
             'tree_node_model.h',
         ],
         'conditions': [
           ['OS=="win"', {
             'sources': [
               'win_util.cc',
@@ skipping 408 matching lines @@
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },
       ],
     }],
   ],
 }