Make non-ddl lazy proxys clean-up and delete their callbacks immediately after instanstation.

This makes sure resources are released and free'd as soon as possible if we
no longer need them.

Bug: skia:
Change-Id: Ic216987649c54183f8cbbff90a633860a97754b3
Reviewed-on: https://skia-review.googlesource.com/105721
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
12 files changed