[net] Move DnsConfigService to NetworkChangeNotifier.

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 367 matching lines @@
         'dns/address_sorter_posix.h',
         'dns/address_sorter_win.cc',
         'dns/dns_client.cc',
         'dns/dns_client.h',
         'dns/dns_config_service.cc',
         'dns/dns_config_service.h',
         'dns/dns_config_service_posix.cc',
         'dns/dns_config_service_posix.h',
         'dns/dns_config_service_win.cc',
         'dns/dns_config_service_win.h',
-        'dns/dns_config_watcher.h',
-        'dns/dns_config_watcher_posix.cc',
-        'dns/dns_config_watcher_win.cc',
         'dns/dns_hosts.cc',
         'dns/dns_hosts.h',
         'dns/dns_protocol.h',
         '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',
@@ skipping 1743 matching lines @@
                 '--result', '<@(_outputs)',
                 '--isolate', 'net_unittests.isolate',
               ],
             },
           ],
         },
       ],
     }],
   ],
 }