Update {virtual,override,final} to follow C++11 style in content, round 2.

content/browser/time_zone_monitor_chromeos.cc

 // Copyright 2014 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 "content/browser/time_zone_monitor.h"
 
 #include "chromeos/settings/timezone_settings.h"
 
 namespace content {
 
 class TimeZoneMonitorChromeOS
     : public TimeZoneMonitor,
       public chromeos::system::TimezoneSettings::Observer {
  public:
   TimeZoneMonitorChromeOS() : TimeZoneMonitor() {
     chromeos::system::TimezoneSettings::GetInstance()->AddObserver(this);
   }
 
-  virtual ~TimeZoneMonitorChromeOS() {
+  ~TimeZoneMonitorChromeOS() override {
     chromeos::system::TimezoneSettings::GetInstance()->RemoveObserver(this);
   }
 
   // chromeos::system::TimezoneSettings::Observer implementation.
-  virtual void TimezoneChanged(const icu::TimeZone& time_zone) override {
+  void TimezoneChanged(const icu::TimeZone& time_zone) override {
     NotifyRenderers();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TimeZoneMonitorChromeOS);
 };
 
 // static
 scoped_ptr<TimeZoneMonitor> TimeZoneMonitor::Create() {
   return scoped_ptr<TimeZoneMonitor>(new TimeZoneMonitorChromeOS());
 }
 
 }  // namespace content