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

ui/events/gestures/motion_event_aura.cc

Index: ui/events/gestures/motion_event_aura.cc
diff --git a/ui/events/gestures/motion_event_aura.cc b/ui/events/gestures/motion_event_aura.cc
index 6890753641195f22a7e0f07be2e0ac6c9cd4bcd0..60f985431aa37e645df7433f5631c3f39aae62a4 100644
--- a/ui/events/gestures/motion_event_aura.cc
+++ b/ui/events/gestures/motion_event_aura.cc
@@ -54,8 +54,10 @@ bool MotionEventAura::OnTouch(const TouchEvent& touch) {
     // crbug.com/446852 for details.
 
     // Cancel the existing touch, before handling the touch press.
-    TouchEvent cancel(ET_TOUCH_CANCELLED, touch.location_f(), touch.touch_id(),
+    TouchEvent cancel(ET_TOUCH_CANCELLED, gfx::Point(), touch.touch_id(),
                       touch.time_stamp());
+    cancel.set_location_f(touch.location_f());
+    cancel.set_root_location_f(touch.location_f());
     OnTouch(cancel);
     CleanupRemovedTouchPoints(cancel);
     DCHECK_EQ(-1, FindPointerIndexOfId(touch.touch_id()));