Target touches to the correct display.

ui/events/gestures/gesture_point.cc

Index: ui/events/gestures/gesture_point.cc
diff --git a/ui/events/gestures/gesture_point.cc b/ui/events/gestures/gesture_point.cc
index fa47727a63cb81ab0b7b88199aef95e51cf5eec8..eafd3449670f8061a2565da1b1e1ef8c5a5e2ba3 100644
--- a/ui/events/gestures/gesture_point.cc
+++ b/ui/events/gestures/gesture_point.cc
@@ -24,7 +24,8 @@ GesturePoint::GesturePoint()
       velocity_calculator_(
           GestureConfiguration::points_buffered_for_velocity()),
       point_id_(-1),
-      touch_id_(-1) {
+      touch_id_(-1),
+      source_device_id_(-1) {
 }
 
 GesturePoint::~GesturePoint() {}
@@ -34,6 +35,7 @@ void GesturePoint::Reset() {
   ResetVelocity();
   point_id_ = -1;
   clear_enclosing_rectangle();
+  source_device_id_ = -1;
 }
 
 void GesturePoint::ResetVelocity() {