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

ash/wm/workspace/multi_window_resize_controller.cc

Index: ash/wm/workspace/multi_window_resize_controller.cc
diff --git a/ash/wm/workspace/multi_window_resize_controller.cc b/ash/wm/workspace/multi_window_resize_controller.cc
index 067275b59bc64efafb619d5e2f0a62bdd8f5a927..3017c9b3ddf2a030be68615d27342e080cbf8cb3 100644
--- a/ash/wm/workspace/multi_window_resize_controller.cc
+++ b/ash/wm/workspace/multi_window_resize_controller.cc
@@ -549,9 +549,9 @@ bool MultiWindowResizeController::IsOverWindows(
   gfx::Point location_in_root(location_in_screen);
   aura::Window* root = windows_.window1->GetRootWindow();
   ::wm::ConvertPointFromScreen(root, &location_in_root);
-  ui::MouseEvent test_event(ui::ET_MOUSE_MOVED, location_in_root,
-                            location_in_root, ui::EventTimeForNow(),
-                            ui::EF_NONE, ui::EF_NONE);
+  ui::MouseEvent test_event(ui::ET_MOUSE_MOVED, gfx::PointF(location_in_root),
+                            gfx::PointF(location_in_root),
+                            ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
   ui::EventTarget* event_handler = static_cast<ui::EventTarget*>(root)
                                        ->GetEventTargeter()
                                        ->FindTargetForEvent(root, &test_event);