Austin Eng 0213292dd7 Allow the DepthClipControl struct, validate the feature is enabled
This change allows the DepthClipControl struct to be chained on the
render pipeline descriptor, but disallows it from being used unless
the feature is enabled. The feature is not enabled on any backend
yet.

Bug: dawn:1178
Change-Id: I37f5c991103dd86c0e61a6ad8cd71cbd86401a9b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/93948
Reviewed-by: Shrek Shao <shrekshao@google.com>
Commit-Queue: Austin Eng <enga@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
2022-06-17 17:26:59 +00:00
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