ash: ozone: apply transformation to events outside the root window

ui/events/event.h

Index: ui/events/event.h
diff --git a/ui/events/event.h b/ui/events/event.h
index 56fd74c85d53d17d000fa1b9c6c0796104379056..bf27b50cb6af27190ba99d62ae16ba3b8bbe67c7 100644
--- a/ui/events/event.h
+++ b/ui/events/event.h
@@ -763,6 +763,16 @@ class EVENTS_EXPORT ScrollEvent : public MouseEvent {
               float x_offset_ordinal,
               float y_offset_ordinal,
               int finger_count);
+  ScrollEvent(EventType type,
+              const gfx::PointF& location,
+              const gfx::PointF& root_location,
+              base::TimeDelta time_stamp,
+              int flags,
+              float x_offset,
+              float y_offset,
+              float x_offset_ordinal,
+              float y_offset_ordinal,
+              int finger_count);
 
   // Scale the scroll event's offset value.
   // This is useful in the multi-monitor setup where it needs to be scaled