Antonio Maiorano e0bee791cb Add ifdefs for Tint API usage that may not be available
Fixed Kokoro failures when building Tint with all readers and writers
disabled.

Change-Id: I9bd041339236488dd563bbe687da883035f2a4b7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/86181
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
2022-04-11 15:21:41 +00:00
..
2022-03-24 17:54:56 +00:00
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