events: Preserve pointer details in native MouseEvent constructor

ui/events/events_stub.cc

Index: ui/events/events_stub.cc
diff --git a/ui/events/events_stub.cc b/ui/events/events_stub.cc
index d4ba557826452749dc6049085dfa57055f22a511..87c71a5b3a48a43bce213d446aaf60a0f3d93489 100644
--- a/ui/events/events_stub.cc
+++ b/ui/events/events_stub.cc
@@ -56,6 +56,11 @@ int GetChangedMouseButtonFlagsFromNative(
   return 0;
 }
 
+PointerDetails GetMousePointerDetailsFromNative(
+    const base::NativeEvent& native_event) {
+  return PointerDetails(EventPointerType::POINTER_TYPE_MOUSE);
+}
+
 gfx::Vector2d GetMouseWheelOffset(const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return gfx::Vector2d();