Replace scoped_ptr with std::unique_ptr in //ui

ui/events/gesture_detection/motion_event.cc

Index: ui/events/gesture_detection/motion_event.cc
diff --git a/ui/events/gesture_detection/motion_event.cc b/ui/events/gesture_detection/motion_event.cc
index 1d8f7c5269adef6323a4532a277be13741886866..07ee9e125f212e2496755bb1ebe604f573784673 100644
--- a/ui/events/gesture_detection/motion_event.cc
+++ b/ui/events/gesture_detection/motion_event.cc
@@ -51,11 +51,11 @@ int MotionEvent::GetSourceDeviceId(size_t pointer_index) const {
   return 0;
 }
 
-scoped_ptr<MotionEvent> MotionEvent::Clone() const {
+std::unique_ptr<MotionEvent> MotionEvent::Clone() const {
   return MotionEventGeneric::CloneEvent(*this);
 }
 
-scoped_ptr<MotionEvent> MotionEvent::Cancel() const {
+std::unique_ptr<MotionEvent> MotionEvent::Cancel() const {
   return MotionEventGeneric::CancelEvent(*this);
 }