replace OVERRIDE and FINAL with override and final in ash/

ash/system/chromeos/network/tray_vpn.h

Index: ash/system/chromeos/network/tray_vpn.h
diff --git a/ash/system/chromeos/network/tray_vpn.h b/ash/system/chromeos/network/tray_vpn.h
index 601d84233bf44265771251a8bc60990de0a04b83..74d7aaa803d04a208643a87003c306d02051f6f1 100644
--- a/ash/system/chromeos/network/tray_vpn.h
+++ b/ash/system/chromeos/network/tray_vpn.h
@@ -25,20 +25,20 @@ class TrayVPN : public SystemTrayItem,
   virtual ~TrayVPN();
 
   // SystemTrayItem
-  virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
-  virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
-  virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
-  virtual void DestroyTrayView() OVERRIDE;
-  virtual void DestroyDefaultView() OVERRIDE;
-  virtual void DestroyDetailedView() OVERRIDE;
-  virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
+  virtual views::View* CreateTrayView(user::LoginStatus status) override;
+  virtual views::View* CreateDefaultView(user::LoginStatus status) override;
+  virtual views::View* CreateDetailedView(user::LoginStatus status) override;
+  virtual void DestroyTrayView() override;
+  virtual void DestroyDefaultView() override;
+  virtual void DestroyDetailedView() override;
+  virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) override;
   virtual void UpdateAfterShelfAlignmentChange(
-      ShelfAlignment alignment) OVERRIDE;
+      ShelfAlignment alignment) override;
 
   // TrayNetworkStateObserver::Delegate
-  virtual void NetworkStateChanged(bool list_changed) OVERRIDE;
+  virtual void NetworkStateChanged(bool list_changed) override;
   virtual void NetworkServiceChanged(
-      const chromeos::NetworkState* network) OVERRIDE;
+      const chromeos::NetworkState* network) override;
 
  private:
   tray::VpnDefaultView* default_;