replace OVERRIDE and FINAL with override and final in net/

net/android/network_change_notifier_android.cc

Index: net/android/network_change_notifier_android.cc
diff --git a/net/android/network_change_notifier_android.cc b/net/android/network_change_notifier_android.cc
index 2461d644b6462e4a5cab42df9bf90be91c941236..410d1fbd10012ebd6c3461923e91e97a17463086 100644
--- a/net/android/network_change_notifier_android.cc
+++ b/net/android/network_change_notifier_android.cc
@@ -81,14 +81,14 @@ class NetworkChangeNotifierAndroid::DnsConfigServiceThread
     Stop();
   }
 
-  virtual void Init() OVERRIDE {
+  virtual void Init() override {
     address_tracker_.Init();
     dns_config_service_ = DnsConfigService::CreateSystemService();
     dns_config_service_->WatchConfig(
         base::Bind(&NetworkChangeNotifier::SetDnsConfig));
   }
 
-  virtual void CleanUp() OVERRIDE {
+  virtual void CleanUp() override {
     dns_config_service_.reset();
   }