[graphite] Add method to attach FinishedProcs via Recorder.
This is mainly for updateBackendTexture usage, rather than including
the proc as part of the method's signature.
This may be temporary as we might move BackendTexture routines to
the Context.
Bug: b/274151809
Change-Id: I0d45e20f17e811e16b6ccf2cd0716f5a4984be5b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/658920
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
7 files changed
