First step of a multi-part change to bring the setIndexBuffer
method up-to-date with the current WebGPU spec. This change
preserves the previous setIndexBuffer semantics for backwards
compatibility until developers have been notified and given
a grace period to transition to the new signature.
BUG=dawn:502
Change-Id: Ia8c665639494d244f52296ceadaedb320fa6c985
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/27182
Commit-Queue: Brandon Jones <bajones@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
8575cb3ec7