In preparation for the descriptorization of BindGroup, support was added
to treat wire ID 0 as nullptr for a bunch of objects. Now that we have a
fuzzer for the wire+frontend, we need to validate when we have a 0 id.
Either the wire needs to reject the ID or the frontend needs to validate
against nullptrs. Since only few entrypoints will have a use for
nullptrs (bind groups, render pass resolve textures), we require an
opt-in in the JSON file for a structure member or an argument to be
optional.
This disables the tests related to ID 0 = nullptr, because we don't yet
have optional argument/members in dawn.json.
BUG=chromium:905273
BUG=chromium:906418
BUG=chromium:908678
Change-Id: If9a3c4857db43ca26a90abff2437e1cebb0ab79b
Reviewed-on: https://dawn-review.googlesource.com/c/2704
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
d8c1a48fc4