replace OVERRIDE and FINAL with override and final in ash/

ash/system/chromeos/brightness/tray_brightness.cc

Index: ash/system/chromeos/brightness/tray_brightness.cc
diff --git a/ash/system/chromeos/brightness/tray_brightness.cc b/ash/system/chromeos/brightness/tray_brightness.cc
index 5c804e85d71e4c9e98b4fa095320bec6c1d250ac..56cd41dbe2e460347fa12875e2efe9f77d0b2453 100644
--- a/ash/system/chromeos/brightness/tray_brightness.cc
+++ b/ash/system/chromeos/brightness/tray_brightness.cc
@@ -61,22 +61,22 @@ class BrightnessView : public ShellObserver,
   void SetBrightnessPercent(double percent);
 
   // ShellObserver:
-  virtual void OnMaximizeModeStarted() OVERRIDE;
-  virtual void OnMaximizeModeEnded() OVERRIDE;
+  virtual void OnMaximizeModeStarted() override;
+  virtual void OnMaximizeModeEnded() override;
 
  private:
   // views::View:
-  virtual void OnBoundsChanged(const gfx::Rect& old_bounds) OVERRIDE;
+  virtual void OnBoundsChanged(const gfx::Rect& old_bounds) override;
 
   // views:SliderListener:
   virtual void SliderValueChanged(views::Slider* sender,
                                   float value,
                                   float old_value,
-                                  views::SliderChangeReason reason) OVERRIDE;
+                                  views::SliderChangeReason reason) override;
 
   // views:SliderListener:
-  virtual void SliderDragStarted(views::Slider* slider) OVERRIDE;
-  virtual void SliderDragEnded(views::Slider* slider) OVERRIDE;
+  virtual void SliderDragStarted(views::Slider* slider) override;
+  virtual void SliderDragEnded(views::Slider* slider) override;
 
   views::Slider* slider_;