Add support for rect-based event targeting in views

ui/gfx/point_conversions.cc

Index: ui/gfx/point_conversions.cc
diff --git a/ui/gfx/point_conversions.cc b/ui/gfx/point_conversions.cc
index f7845a03f41911528d8572304345d0cfe4d9353a..e48116be9bbd4e93ea52ae8e1b741d62ba131d63 100644
--- a/ui/gfx/point_conversions.cc
+++ b/ui/gfx/point_conversions.cc
@@ -14,6 +14,14 @@ Point ToFlooredPoint(const PointF& point) {
   return Point(x, y);
 }
 
+Rect ToFlooredRect(const RectF& rect) {
+  int x = ToFlooredInt(rect.x());
+  int y = ToFlooredInt(rect.y());
+  int width = ToFlooredInt(rect.width());
+  int height = ToFlooredInt(rect.height());
+  return Rect(x, y, width, height);
+}
+
 Point ToCeiledPoint(const PointF& point) {
   int x = ToCeiledInt(point.x());
   int y = ToCeiledInt(point.y());