views: Update event-related API to use PointF/RectF instead of Point/Rect.

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;
+class PointF;
+class RectF;
 }
 
 namespace views {
 
 // Returns true if |rect| is 1x1.
-VIEWS_EXPORT bool UsePointBasedTargeting(const gfx::Rect& rect);
+VIEWS_EXPORT bool UsePointBasedTargeting(const gfx::RectF& 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);
+VIEWS_EXPORT float PercentCoveredBy(const gfx::RectF& rect_1,
+                                    const gfx::RectF& 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);
+VIEWS_EXPORT float DistanceSquaredFromCenterToPoint(const gfx::PointF& point,
+                                                    const gfx::RectF& rect);
 
 }  // namespace views
 
 #endif  // UI_RECT_BASED_TARGETING_UTILS_H_