Add PointerDetails to ui::MouseEvent's constructors

ui/events/event.cc

Index: ui/events/event.cc
diff --git a/ui/events/event.cc b/ui/events/event.cc
index 64f06d0cae3d0fbef8a52b7a4c723663beca8582..0fef5698a328c4c8f5a1e47819f43fd5f15a3303 100644
--- a/ui/events/event.cc
+++ b/ui/events/event.cc
@@ -625,14 +625,15 @@ MouseEvent::MouseEvent(EventType type,
                        const gfx::Point& root_location,
                        base::TimeTicks time_stamp,
                        int flags,
-                       int changed_button_flags)
+                       int changed_button_flags,
+                       const PointerDetails& pointer_details)
     : LocatedEvent(type,
                    gfx::PointF(location),
                    gfx::PointF(root_location),
                    time_stamp,
                    flags),
       changed_button_flags_(changed_button_flags),
-      pointer_details_(PointerDetails(EventPointerType::POINTER_TYPE_MOUSE)) {
+      pointer_details_(pointer_details) {
   DCHECK_NE(ET_MOUSEWHEEL, type);
   latency()->AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0);
   if (this->type() == ET_MOUSE_MOVED && IsAnyButton())
@@ -812,7 +813,9 @@ MouseWheelEvent::MouseWheelEvent(const gfx::Vector2d& offset,
                  root_location,
                  time_stamp,
                  flags,
-                 changed_button_flags),
+                 changed_button_flags,
+                 PointerDetails(ui::EventPointerType::POINTER_TYPE_MOUSE,
+                                PointerEvent::kMousePointerId)),
       offset_(offset) {
   // Set event type to ET_UNKNOWN initially in MouseEvent() to pass the
   // DCHECK for type to enforce that we use MouseWheelEvent() to create
@@ -1411,7 +1414,14 @@ ScrollEvent::ScrollEvent(EventType type,
                          float y_offset_ordinal,
                          int finger_count,
                          EventMomentumPhase momentum_phase)
-    : MouseEvent(type, location, location, time_stamp, flags, 0),
+    : MouseEvent(type,
+                 location,
+                 location,
+                 time_stamp,
+                 flags,
+                 0,
+                 PointerDetails(ui::EventPointerType::POINTER_TYPE_MOUSE,
+                                PointerEvent::kMousePointerId)),
       x_offset_(x_offset),
       y_offset_(y_offset),
       x_offset_ordinal_(x_offset_ordinal),