This change adds the node, but this is (currently) not generated or used.
Bug: tint:1654
Change-Id: Id38e531bf811833cf576085805cb00f444ea5451
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/99581
Commit-Queue: James Price <jrprice@google.com>
Kokoro: James Price <jrprice@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>