It is time.

ui/wm/core/masked_window_targeter.h

-// Copyright 2014 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_MASKED_WINDOW_TARGETER_H_
-#define UI_WM_CORE_MASKED_WINDOW_TARGETER_H_
-
-#include "ui/aura/window_targeter.h"
-#include "ui/wm/wm_export.h"
-
-namespace gfx {
-class Path;
-}
-
-namespace wm {
-
-class WM_EXPORT MaskedWindowTargeter : public aura::WindowTargeter {
- public:
-  explicit MaskedWindowTargeter(aura::Window* masked_window);
-  virtual ~MaskedWindowTargeter();
-
- protected:
-  // Sets the hit-test mask for |window| in |mask| (in |window|'s local
-  // coordinate system). Returns whether a valid mask has been set in |mask|.
-  virtual bool GetHitTestMask(aura::Window* window, gfx::Path* mask) const = 0;
-
-  // ui::EventTargeter:
-  virtual bool EventLocationInsideBounds(
-      ui::EventTarget* target,
-      const ui::LocatedEvent& event) const override;
-
- private:
-  aura::Window* masked_window_;
-
-  DISALLOW_COPY_AND_ASSIGN(MaskedWindowTargeter);
-};
-
-}  // namespace wm
-
-#endif  // UI_WM_CORE_MASKED_WINDOW_TARGETER_H_