mojo_service_manager/lib/mojom/type_mappings.json

{
  "c++": {
    "mojo_base.mojom.TimeDelta": {
      "hashable": false,
      "typename": "base::TimeDelta",
      "forward_declaration": null,
      "traits_headers": [
        "mojo_service_manager/lib/mojom/time_mojom_traits.h"
      ],
      "copyable_pass_by_value": true,
      "force_serialize": false,
      "move_only": false,
      "nullable_is_same_type": false,
      "non_copyable_non_movable": false,
      "public_headers": [
        "base/time/time.h"
      ]
    }
  }
}