It is time.

ui/wm/public/activation_delegate.h

-// Copyright (c) 2012 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 UI_WM_PUBLIC_ACTIVATION_DELEGATE_H_
-#define UI_WM_PUBLIC_ACTIVATION_DELEGATE_H_
-
-#include "ui/aura/aura_export.h"
-
-namespace ui {
-class Event;
-}
-
-namespace aura {
-class Window;
-namespace client {
-
-// An interface implemented by an object that configures and responds to changes
-// to a window's activation state.
-class AURA_EXPORT ActivationDelegate {
- public:
-  // Returns true if the window should be activated.
-  virtual bool ShouldActivate() const = 0;
-
- protected:
-  virtual ~ActivationDelegate() {}
-};
-
-// Sets/Gets the ActivationDelegate on the Window. No ownership changes.
-AURA_EXPORT void SetActivationDelegate(Window* window,
-                                       ActivationDelegate* delegate);
-AURA_EXPORT ActivationDelegate* GetActivationDelegate(Window* window);
-
-}  // namespace client
-}  // namespace aura
-
-#endif  // UI_WM_PUBLIC_ACTIVATION_DELEGATE_H_