Update Dawn backend to recent GrGpu::onCreateTexture() change.

Change-Id: I9e329406f70eb1a0f8b86088ee9c2b7baa32f9af
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/241046
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>
2 files changed