It is time.

ui/views/masked_targeter_delegate.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_VIEWS_MASKED_TARGETER_DELEGATE_H_
-#define UI_VIEWS_MASKED_TARGETER_DELEGATE_H_
-
-#include "ui/base/ui_base_types.h"
-#include "ui/views/view_targeter_delegate.h"
-#include "ui/views/views_export.h"
-
-namespace gfx {
-class Path;
-class Rect;
-}
-
-namespace views {
-class View;
-
-// Defines the default behaviour for hit-testing a rectangular region against
-// the bounds of a View having a custom-shaped hit test mask. Views define
-// such a mask by extending this class.
-class VIEWS_EXPORT MaskedTargeterDelegate : public ViewTargeterDelegate {
- public:
-  MaskedTargeterDelegate() {}
-  virtual ~MaskedTargeterDelegate() {}
-
-  // Sets the hit-test mask for the view which implements this interface,
-  // in that view's local coordinate space. Returns whether a valid mask
-  // has been set in |mask|.
-  virtual bool GetHitTestMask(gfx::Path* mask) const = 0;
-
-  // ViewTargeterDelegate:
-  virtual bool DoesIntersectRect(const View* target,
-                                 const gfx::Rect& rect) const override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MaskedTargeterDelegate);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_MASKED_TARGETER_DELEGATE_H_