[net/dns] Watch configd notifications to detect DnsConfig changes on Mac.

net/net.gyp

 # 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': {
     'chromium_code': 1,
 
     'linux_link_kerberos%': 0,
     'conditions': [
@@ skipping 351 matching lines @@
         'dns/dns_query.cc',
         'dns/dns_query.h',
         'dns/dns_response.cc',
         'dns/dns_response.h',
         'dns/dns_session.cc',
         'dns/dns_session.h',
         'dns/dns_transaction.cc',
         'dns/dns_transaction.h',
         'dns/file_path_watcher_wrapper.cc',
         'dns/file_path_watcher_wrapper.h',
+        'dns/notify_watcher_mac.cc',
+        'dns/notify_watcher_mac.h',
         'dns/serial_worker.cc',
         'dns/serial_worker.h',
         'ftp/ftp_auth_cache.cc',
         'ftp/ftp_auth_cache.h',
         'ftp/ftp_ctrl_response_buffer.cc',
         'ftp/ftp_ctrl_response_buffer.h',
         'ftp/ftp_directory_listing_parser.cc',
         'ftp/ftp_directory_listing_parser.h',
         'ftp/ftp_directory_listing_parser_ls.cc',
         'ftp/ftp_directory_listing_parser_ls.h',
@@ skipping 1425 matching lines @@
             'tools/dump_cache/url_to_filename_encoder.cc',
             'tools/dump_cache/url_to_filename_encoder.h',
             'tools/dump_cache/url_utilities.h',
             'tools/dump_cache/url_utilities.cc',
           ],
         },
       ],
     }],
   ],
 }