Add DiscoveryNetworkMonitor implementation

chrome/browser/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 638 matching lines @@
     "net/chrome_http_user_agent_settings.cc",
     "net/chrome_http_user_agent_settings.h",
     "net/chrome_net_log_helper.cc",
     "net/chrome_net_log_helper.h",
     "net/chrome_network_delegate.cc",
     "net/chrome_network_delegate.h",
     "net/chrome_url_request_context_getter.cc",
     "net/chrome_url_request_context_getter.h",
     "net/crl_set_fetcher.cc",
     "net/crl_set_fetcher.h",
+    "net/discovery_network_list.h",
+    "net/discovery_network_list_posix.cc",
+    "net/discovery_network_list_wifi.h",
+    "net/discovery_network_list_wifi_linux.cc",
+    "net/discovery_network_monitor.cc",
+    "net/discovery_network_monitor.h",
     "net/dns_probe_runner.cc",
     "net/dns_probe_runner.h",
     "net/dns_probe_service.cc",
     "net/dns_probe_service.h",
     "net/file_downloader.cc",
     "net/file_downloader.h",
     "net/http_server_properties_manager_factory.cc",
     "net/http_server_properties_manager_factory.h",
     "net/net_error_diagnostics_dialog.h",
     "net/net_error_diagnostics_dialog_mac.cc",
@@ skipping 3885 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_manifest") {
   name = "preferences"
   source = "prefs/preferences_manifest.json"
 }