It is time.

ui/views/cull_set.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_CULL_SET_H_
-#define UI_VIEWS_CULL_SET_H_
-
-#include "base/containers/hash_tables.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/views/views_export.h"
-
-namespace views {
-
-class View;
-
-// A CullSet defines a set of View pointers which have been possibly culled
-// from painting or other bounds-checking operations. It wraps a set of
-// pointers to views, or NULL if no such set is available.
-class VIEWS_EXPORT CullSet {
- public:
-  // Default constructor builds a CullSet that will always return true for
-  // ShouldPaint().
-  CullSet();
-  ~CullSet();
-
-  // Wraps a set of pointers to Views, as might be provided by
-  // gfx::RTree::Query(), that intersect the damage rect and therefore need
-  // to be painted. CullSet takes ownership of the provided pointer.
-  CullSet(scoped_ptr<base::hash_set<intptr_t> > cull_set);
-
-  // Returns true if |view| needs to be painted.
-  bool ShouldPaint(const View* view) const;
-
- private:
-  friend class BoundsTreeTestView;
-
-  // The set of Views that collided with the query rectangle provided to the
-  // RTree data structure, or NULL if one is not available.
-  scoped_ptr<base::hash_set<intptr_t> > cull_set_;
-
-  DISALLOW_COPY_AND_ASSIGN(CullSet);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_CULL_SET_H_