Refactor existing memory allocators by using a common
memory type and handle.
BUG=dawn:27
Change-Id: Ieed4fa30a0bd8fedfb3a3c580920805f40b56fae
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/10680
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Bryan Bernhart <bryan.bernhart@intel.com>