Standardize usage of virtual/override/final in net/

net/base/network_change_notifier_mac.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.
 
 #include "net/base/network_change_notifier_mac.h"
 
 #include <netinet/in.h>
 #include <resolv.h>
 
 #include "base/basictypes.h"
@@ skipping 25 matching lines @@
     return NetworkChangeNotifier::CONNECTION_NONE;
   }
 }
 
 // Thread on which we can run DnsConfigService, which requires a TYPE_IO
 // message loop.
 class NetworkChangeNotifierMac::DnsConfigServiceThread : public base::Thread {
  public:
   DnsConfigServiceThread() : base::Thread("DnsConfigService") {}
 
-  virtual ~DnsConfigServiceThread() {
-    Stop();
-  }
+  ~DnsConfigServiceThread() override { Stop(); }
 
-  virtual void Init() override {
+  void Init() override {
     service_ = DnsConfigService::CreateSystemService();
     service_->WatchConfig(base::Bind(&NetworkChangeNotifier::SetDnsConfig));
   }
 
-  virtual void CleanUp() override {
-    service_.reset();
-  }
+  void CleanUp() override { service_.reset(); }
 
  private:
   scoped_ptr<DnsConfigService> service_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsConfigServiceThread);
 };
 
 NetworkChangeNotifierMac::NetworkChangeNotifierMac()
     : NetworkChangeNotifier(NetworkChangeCalculatorParamsMac()),
       connection_type_(CONNECTION_UNKNOWN),
@@ skipping 195 matching lines @@
     NotifyObserversOfConnectionTypeChange();
 
 #if defined(OS_IOS)
   // On iOS, the SCDynamicStore API does not exist, and we use the reachability
   // API to detect IP address changes instead.
   NotifyObserversOfIPAddressChange();
 #endif  // defined(OS_IOS)
 }
 
 }  // namespace net