Update child objects to ref the device. This allows them to outlive
the device, making the implementation more robust such that it is OK
to drop the device before other objects.
Dropping the last external reference to the device is currently an
implicit device.destroy(). This destruction breaks possible ref cycles
where the device refs internal objects which have a back ref to the
device.
Bug: dawn:1164
Change-Id: I02d8e32a21dcc5f05e531bd690baac4a234b5f6b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/90360
Reviewed-by: Loko Kung <lokokung@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
