This is a small rework to try to make the template better handle
functions that aren't associated with an object, when during an
unrelated patch I got confused that APICreateInstance didn't appear in
dawn::native.
Change-Id: If5a2aa3f9e348d1847e48fec4e90e5966ddd489d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/86530
Reviewed-by: Austin Eng <enga@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Loko Kung <lokokung@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>