This patch enables nonzero_clear_resources_on_creation_for_testing
toggle on buffer on Metal backends as a preparation of supporting buffer
lazy-initializations in Dawn.
BUG=dawn:414
TEST=dawn_end2end_tests
Change-Id: Ia7106482922aeb0521affa206f459d40938a0131
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/22861
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Jiawei Shao