This makes refcounting of these objects more automatic to try and
prevent leaks or use-after-frees in the future.
Also removes operator* from RefBase (and Ref) because it is never used
and cannot work in a normal way for ObjectiveC protocols that cannot be
dereferenced.
Bug: dawn:89
Change-Id: I2e3fbfd638e2ba76d8c563f30bc489a384152552
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/32161
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
