replace OVERRIDE and FINAL with override and final in net/

net/base/network_change_notifier_win.cc

Index: net/base/network_change_notifier_win.cc
diff --git a/net/base/network_change_notifier_win.cc b/net/base/network_change_notifier_win.cc
index 4580fa8a1dc57523b5d894dab102fb28b02f42ce..225568192f2af9a4aaede50fefac1dbefdae053f 100644
--- a/net/base/network_change_notifier_win.cc
+++ b/net/base/network_change_notifier_win.cc
@@ -37,12 +37,12 @@ class NetworkChangeNotifierWin::DnsConfigServiceThread : public base::Thread {
     Stop();
   }
 
-  virtual void Init() OVERRIDE {
+  virtual void Init() override {
     service_ = DnsConfigService::CreateSystemService();
     service_->WatchConfig(base::Bind(&NetworkChangeNotifier::SetDnsConfig));
   }
 
-  virtual void CleanUp() OVERRIDE {
+  virtual void CleanUp() override {
     service_.reset();
   }