replace OVERRIDE and FINAL with override and final in ash/

ash/system/chromeos/enterprise/tray_enterprise.h

Index: ash/system/chromeos/enterprise/tray_enterprise.h
diff --git a/ash/system/chromeos/enterprise/tray_enterprise.h b/ash/system/chromeos/enterprise/tray_enterprise.h
index ed41a7f3150d21f9a5992559aff893a51202faa9..fe3dcd7dbcc73f68e83ed00202d481b0126a06f7 100644
--- a/ash/system/chromeos/enterprise/tray_enterprise.h
+++ b/ash/system/chromeos/enterprise/tray_enterprise.h
@@ -29,14 +29,14 @@ class TrayEnterprise : public SystemTrayItem,
   void UpdateEnterpriseMessage();
 
   // Overridden from SystemTrayItem.
-  virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
-  virtual void DestroyDefaultView() OVERRIDE;
+  virtual views::View* CreateDefaultView(user::LoginStatus status) override;
+  virtual void DestroyDefaultView() override;
 
   // Overridden from EnterpriseDomainObserver.
-  virtual void OnEnterpriseDomainChanged() OVERRIDE;
+  virtual void OnEnterpriseDomainChanged() override;
 
   // Overridden from ViewClickListener.
-  virtual void OnViewClicked(views::View* sender) OVERRIDE;
+  virtual void OnViewClicked(views::View* sender) override;
 
  private:
   LabelTrayView* tray_view_;