replace OVERRIDE and FINAL with override and final in ash/

ash/system/chromeos/power/tray_power.h

Index: ash/system/chromeos/power/tray_power.h
diff --git a/ash/system/chromeos/power/tray_power.h b/ash/system/chromeos/power/tray_power.h
index 3bd0b201453d973a6e1067dad89b20aec82eabf9..a0623fc90b56298cc402ef4cb5b272acf907afd0 100644
--- a/ash/system/chromeos/power/tray_power.h
+++ b/ash/system/chromeos/power/tray_power.h
@@ -68,19 +68,19 @@ class ASH_EXPORT TrayPower : public SystemTrayItem,
   };
 
   // Overridden from SystemTrayItem.
-  virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
-  virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
+  virtual views::View* CreateTrayView(user::LoginStatus status) override;
+  virtual views::View* CreateDefaultView(user::LoginStatus status) override;
   virtual views::View* CreateNotificationView(
-      user::LoginStatus status) OVERRIDE;
-  virtual void DestroyTrayView() OVERRIDE;
-  virtual void DestroyDefaultView() OVERRIDE;
-  virtual void DestroyNotificationView() OVERRIDE;
-  virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
+      user::LoginStatus status) override;
+  virtual void DestroyTrayView() override;
+  virtual void DestroyDefaultView() override;
+  virtual void DestroyNotificationView() override;
+  virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) override;
   virtual void UpdateAfterShelfAlignmentChange(
-      ShelfAlignment alignment) OVERRIDE;
+      ShelfAlignment alignment) override;
 
   // Overridden from PowerStatus::Observer.
-  virtual void OnPowerStatusChanged() OVERRIDE;
+  virtual void OnPowerStatusChanged() override;
 
   // Show a notification that a low-power USB charger has been connected.
   // Returns true if a notification was shown or explicitly hidden.