This CL makes the wire gracefully handle all invalid and unknown
sTypes. All unknown sType structs are serialized and deserialized
as the base WGPUChainedStruct with sType Invalid.
Bug: dawn:369, dawn:654
Change-Id: Ia2571df81fc96e2c672d3ea13c03237a2d5fa5c1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/39460
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>