This reverts a fraction of b2c5dae65d to
restore the deinstantiate lazy proxy type, supporting implementation,
and tests.
Use them for promise images to avoid thread safety issues for promise
image resources. Makes promise image instantiation callbacks do a thread
safe unref of their fulfilled GrTexture in GrResourceCache. The
GrResourceCache mechanism for receiving unref messages is extended to
allow multiple pending unrefs. All this is new.
Bug: skia:8800
Change-Id: I7b1d4fea13c053b6fbbd39c0c6eaf567b8bf81f1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/199002
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
8b40ac35b2