gfx: Make conversions from gfx::Point to PointF explicit.

ui/views/controls/scrollbar/base_scroll_bar_button.cc

Index: ui/views/controls/scrollbar/base_scroll_bar_button.cc
diff --git a/ui/views/controls/scrollbar/base_scroll_bar_button.cc b/ui/views/controls/scrollbar/base_scroll_bar_button.cc
index 54dbe7501ee01024757816a651bf9ceafcaddc79..528704dcc43189a3dcc8c98f8acc9654a7bb77c0 100644
--- a/ui/views/controls/scrollbar/base_scroll_bar_button.cc
+++ b/ui/views/controls/scrollbar/base_scroll_bar_button.cc
@@ -37,8 +37,8 @@ void BaseScrollBarButton::OnMouseCaptureLost() {
 void BaseScrollBarButton::RepeaterNotifyClick() {
   // TODO(sky): See if we can convert to using |Screen| everywhere.
   // TODO(scottmg): Native is wrong: http://crbug.com/133312
-  gfx::Point cursor_point =
-      gfx::Screen::GetNativeScreen()->GetCursorScreenPoint();
+  auto cursor_point =
+      gfx::PointF(gfx::Screen::GetNativeScreen()->GetCursorScreenPoint());
   ui::MouseEvent event(ui::ET_MOUSE_RELEASED, cursor_point, cursor_point,
                        ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON,
                        ui::EF_LEFT_MOUSE_BUTTON);