replace 'virtual ... OVERRIDE' with '... override'

base/test/power_monitor_test_base.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 BASE_TEST_POWER_MONITOR_TEST_BASE_H_
 #define BASE_TEST_POWER_MONITOR_TEST_BASE_H_
 
 #include "base/message_loop/message_loop.h"
 #include "base/power_monitor/power_monitor.h"
 #include "base/power_monitor/power_monitor_source.h"
 
 namespace base {
 
 class PowerMonitorTestSource : public PowerMonitorSource {
  public:
   PowerMonitorTestSource();
   virtual ~PowerMonitorTestSource();
 
   void GeneratePowerStateEvent(bool on_battery_power);
   void GenerateSuspendEvent();
   void GenerateResumeEvent();
 
  protected:
-  virtual bool IsOnBatteryPowerImpl() OVERRIDE;
+  bool IsOnBatteryPowerImpl() override;
 
   bool test_on_battery_power_;
   MessageLoop message_loop_;
 };
 
 class PowerMonitorTestObserver : public PowerObserver {
  public:
   PowerMonitorTestObserver();
   virtual ~PowerMonitorTestObserver();
 
   // PowerObserver callbacks.
-  virtual void OnPowerStateChange(bool on_battery_power) OVERRIDE;
-  virtual void OnSuspend() OVERRIDE;
-  virtual void OnResume() OVERRIDE;
+  void OnPowerStateChange(bool on_battery_power) override;
+  void OnSuspend() override;
+  void OnResume() override;
 
   // Test status counts.
   bool last_power_state() { return last_power_state_; }
   int power_state_changes() { return power_state_changes_; }
   int suspends() { return suspends_; }
   int resumes() { return resumes_; }
 
  private:
   bool last_power_state_; // Last power state we were notified of.
   int power_state_changes_;  // Count of OnPowerStateChange notifications.
   int suspends_;  // Count of OnSuspend notifications.
   int resumes_;  // Count of OnResume notifications.
 };
 
 }  // namespace base
 
 #endif  // BASE_TEST_POWER_MONITOR_TEST_BASE_H_