It is time.

ui/wm/core/base_focus_rules.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_CORE_BASE_FOCUS_RULES_H_
-#define UI_WM_CORE_BASE_FOCUS_RULES_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "ui/wm/core/focus_rules.h"
-
-namespace wm {
-
-// A set of basic focus and activation rules. Specializations should most likely
-// subclass this and call up to these methods rather than reimplementing them.
-class WM_EXPORT BaseFocusRules : public FocusRules {
- protected:
-  BaseFocusRules();
-  virtual ~BaseFocusRules();
-
-  // Returns true if the children of |window| can be activated.
-  virtual bool SupportsChildActivation(aura::Window* window) const = 0;
-
-  // Returns true if |window| is considered visible for activation purposes.
-  virtual bool IsWindowConsideredVisibleForActivation(
-      aura::Window* window) const;
-
-  // Overridden from FocusRules:
-  virtual bool IsToplevelWindow(aura::Window* window) const override;
-  virtual bool CanActivateWindow(aura::Window* window) const override;
-  virtual bool CanFocusWindow(aura::Window* window) const override;
-  virtual aura::Window* GetToplevelWindow(aura::Window* window) const override;
-  virtual aura::Window* GetActivatableWindow(
-      aura::Window* window) const override;
-  virtual aura::Window* GetFocusableWindow(aura::Window* window) const override;
-  virtual aura::Window* GetNextActivatableWindow(
-      aura::Window* ignore) const override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BaseFocusRules);
-};
-
-}  // namespace wm
-
-#endif  // UI_WM_CORE_BASE_FOCUS_RULES_H_