It is time.

ui/views/rect_based_targeting_utils.h

-// Copyright 2013 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_RECT_BASED_TARGETING_UTILS_H_
-#define UI_RECT_BASED_TARGETING_UTILS_H_
-
-#include "ui/views/views_export.h"
-
-namespace gfx {
-class Point;
-class Rect;
-}
-
-namespace views {
-
-// Returns true if |rect| is 1x1.
-VIEWS_EXPORT bool UsePointBasedTargeting(const gfx::Rect& rect);
-
-// Returns the percentage of |rect_1|'s area that is covered by |rect_2|.
-VIEWS_EXPORT float PercentCoveredBy(const gfx::Rect& rect_1,
-                                    const gfx::Rect& rect_2);
-
-// Returns the square of the distance from |point| to the center of |rect|.
-VIEWS_EXPORT int DistanceSquaredFromCenterToPoint(const gfx::Point& point,
-                                                  const gfx::Rect& rect);
-
-}  // namespace views
-
-#endif  // UI_RECT_BASED_TARGETING_UTILS_H_