Add retain() instead (this will be added to sk_cf_obj as well).
The issue is that Chrome is storing their objects in a unique_ptr<>
style class which wishes to retain ownership, so we can't use reset(),
which transfers ownership.
Change-Id: I84fd453128963c11c6c8b6e950be8a0851e03066
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/219523
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
7bd76643aa