Re-enable explicit resource allocation in Skia

I can no longer repro the bug (assignment of the same GrTexture to both
sides of a dest read) locally. Let's see what the bots have to say.

Change-Id: Ia71bb6fb44c5b8dc3dd870f7b20e12a6db70e26c
Reviewed-on: https://skia-review.googlesource.com/103581
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed