virtual/override specifier cleanup in content/.

content/browser/geolocation/empty_wifi_data_provider.h

 // Copyright 2013 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 CONTENT_BROWSER_GEOLOCATION_EMPTY_WIFI_DATA_PROVIDER_H_
 #define CONTENT_BROWSER_GEOLOCATION_EMPTY_WIFI_DATA_PROVIDER_H_
 
 #include "content/browser/geolocation/wifi_data_provider.h"
 
 namespace content {
 
 // An implementation of WifiDataProvider that does not provide any
 // data. Used on platforms where a real implementation is not available.
 class EmptyWifiDataProvider : public WifiDataProvider {
  public:
   EmptyWifiDataProvider();
 
   // WifiDataProvider implementation
-  virtual void StartDataProvider() override { }
-  virtual void StopDataProvider() override { }
-  virtual bool GetData(WifiData* data) override;
+  void StartDataProvider() override { }
+  void StopDataProvider() override { }
+  bool GetData(WifiData* data) override;
 
  private:
-  virtual ~EmptyWifiDataProvider();
+  ~EmptyWifiDataProvider() override;
 
   DISALLOW_COPY_AND_ASSIGN(EmptyWifiDataProvider);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GEOLOCATION_EMPTY_WIFI_DATA_PROVIDER_H_