[webgpu-headers] Add macro for dropping "descriptor"

- No operational changes.

https://github.com/webgpu-native/webgpu-headers/pull/309
https://github.com/webgpu-native/webgpu-headers/pull/310
https://github.com/webgpu-native/webgpu-headers/pull/318

Bug: 42241174
Change-Id: Ia881b48c222b6448fc1e9682e542d4172eaf3958
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/874956
Commit-Queue: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Auto-Submit: Fr <beaufort.francois@gmail.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
3 files changed