This reverts commit 742f3d02a1.
Reason for revert: Aaah!
Original change's description:
> Make threaded proxy generation MDB-friendly, and defer instantiation
>
> Replaces GrPrepareCallback with GrDeferredProxyUploader, stored directly
> on GrTextureProxy. Op lists now store a list of referenced proxies that
> are being generated by worker threads. At flush time, iterate over those
> proxies, and invoke their uploader.
>
> Lifetime of the uploader object is now tied to the proxy, but the ASAP
> upload function will free the proxy's uploader, if it's called.
>
> Bug: skia:
> Change-Id: Ieb2c6a805d19990012839a8e103c3ca5b8d3dfc6
> Reviewed-on: https://skia-review.googlesource.com/49904
> Commit-Queue: Brian Osman <brianosman@google.com>
> Reviewed-by: Robert Phillips <robertphillips@google.com>
TBR=egdaniel@google.com,robertphillips@google.com,brianosman@google.com
Change-Id: I8f76a67044dc4159f903097d8b1ef19ffb48c730
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/52760
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
837c6c7c0c