Avoid initial NetworkChangeNotifier OnDNSChanged() signal on Android

net/tools/net_watcher/net_watcher.cc

 // 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.
 
 // This is a small utility that watches for and logs network changes.
 
 #include <string>
 
 #include "base/at_exit.h"
 #include "base/basictypes.h"
@@ skipping 84 matching lines @@
 
   // net::NetworkChangeNotifier::ConnectionTypeObserver implementation.
   void OnConnectionTypeChanged(
       net::NetworkChangeNotifier::ConnectionType type) override {
     LOG(INFO) << "OnConnectionTypeChanged("
               << ConnectionTypeToString(type) << ")";
   }
 
   // net::NetworkChangeNotifier::DNSObserver implementation.
   void OnDNSChanged() override { LOG(INFO) << "OnDNSChanged()"; }
+  void OnInitialDNSConfigRead() override {
+    LOG(INFO) << "OnInitialDNSConfigRead()";
+  }
 
   // net::NetworkChangeNotifier::NetworkChangeObserver implementation.
   void OnNetworkChanged(
       net::NetworkChangeNotifier::ConnectionType type) override {
     LOG(INFO) << "OnNetworkChanged("
               << ConnectionTypeToString(type) << ")";
   }
 
   // net::ProxyConfigService::Observer implementation.
   void OnProxyConfigChanged(
@@ skipping 73 matching lines @@
   proxy_config_service->RemoveObserver(&net_watcher);
 
   // Uses |network_change_notifier|.
   net::NetworkChangeNotifier::RemoveDNSObserver(&net_watcher);
   net::NetworkChangeNotifier::RemoveConnectionTypeObserver(&net_watcher);
   net::NetworkChangeNotifier::RemoveIPAddressObserver(&net_watcher);
   net::NetworkChangeNotifier::RemoveNetworkChangeObserver(&net_watcher);
 
   return 0;
 }