Target touches to the correct display.

ui/events/gestures/gesture_sequence.cc

Index: ui/events/gestures/gesture_sequence.cc
diff --git a/ui/events/gestures/gesture_sequence.cc b/ui/events/gestures/gesture_sequence.cc
index 7c195199454cd7421cb61a6739300f4827f8a1aa..803f4a85da73ed04f84de33cf541489be745062c 100644
--- a/ui/events/gestures/gesture_sequence.cc
+++ b/ui/events/gestures/gesture_sequence.cc
@@ -520,6 +520,7 @@ GestureSequence::Gestures* GestureSequence::ProcessTouchEventForGesture(
     }
     new_point->set_point_id(point_count_++);
     new_point->set_touch_id(event.touch_id());
+    new_point->set_source_device_id(event.source_device_id());
   }
 
   GestureState last_state = state_;