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

ui/message_center/views/notification_view.cc

Index: ui/message_center/views/notification_view.cc
diff --git a/ui/message_center/views/notification_view.cc b/ui/message_center/views/notification_view.cc
index 671b42045bb9d8202761c8b9ca07a2bdf43bc32d..8f0c772f9766779726291d3471fac41566c03b37 100644
--- a/ui/message_center/views/notification_view.cc
+++ b/ui/message_center/views/notification_view.cc
@@ -523,11 +523,11 @@ void NotificationView::ScrollRectToVisible(const gfx::Rect& rect) {
   views::View::ScrollRectToVisible(GetLocalBounds());
 }
 
-views::View* NotificationView::GetEventHandlerForRect(const gfx::Rect& rect) {
+views::View* NotificationView::GetEventHandlerForRect(const gfx::RectF& rect) {
   // TODO(tdanderson): Modify this function to support rect-based event
   // targeting. Using the center point of |rect| preserves this function's
   // expected behavior for the time being.
-  gfx::Point point = rect.CenterPoint();
+  gfx::Point point = gfx::ToFlooredPoint(rect.CenterPoint());
 
   // Want to return this for underlying views, otherwise GetCursor is not
   // called. But buttons are exceptions, they'll have their own event handlings.