events: Preserve pointer details in native MouseEvent constructor

ui/events/x/events_x.cc

Index: ui/events/x/events_x.cc
diff --git a/ui/events/x/events_x.cc b/ui/events/x/events_x.cc
index 6afb53cbc9b5921f93fbd53c0a305f1336dd77c2..cbc14b663a0217c2ed2ea652b9109abbc71bdfc7 100644
--- a/ui/events/x/events_x.cc
+++ b/ui/events/x/events_x.cc
@@ -675,6 +675,11 @@ 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) {
   float x_offset, y_offset;
   if (GetScrollOffsets(