Standardize usage of virtual/override/final in net/

net/dns/dns_config_service_posix.h

 // 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.
 
 #ifndef NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_
 #define NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_
 
 #if !defined(OS_ANDROID)
 #include <sys/types.h>
 #include <netinet/in.h>
 #include <resolv.h>
 #endif
 
 #include "base/compiler_specific.h"
 #include "net/base/net_export.h"
 #include "net/dns/dns_config_service.h"
 
 namespace net {
 
 // Use DnsConfigService::CreateSystemService to use it outside of tests.
 namespace internal {
 
 class NET_EXPORT_PRIVATE DnsConfigServicePosix : public DnsConfigService {
  public:
   DnsConfigServicePosix();
-  virtual ~DnsConfigServicePosix();
+  ~DnsConfigServicePosix() override;
 
  protected:
   // DnsConfigService:
-  virtual void ReadNow() override;
-  virtual bool StartWatching() override;
+  void ReadNow() override;
+  bool StartWatching() override;
 
  private:
   class Watcher;
   class ConfigReader;
   class HostsReader;
 
   void OnConfigChanged(bool succeeded);
   void OnHostsChanged(bool succeeded);
 
   scoped_ptr<Watcher> watcher_;
@@ skipping 21 matching lines @@
 // Fills in |dns_config| from |res|.
 ConfigParsePosixResult NET_EXPORT_PRIVATE ConvertResStateToDnsConfig(
     const struct __res_state& res, DnsConfig* dns_config);
 #endif
 
 }  // namespace internal
 
 }  // namespace net
 
 #endif  // NET_DNS_DNS_CONFIG_SERVICE_POSIX_H_