Scrub memory released from a GrMemoryPool in debug mode.

In debug mode, we now overwrite released memory with 0xDD. This is
intended to make use-after-free errors easier to catch while debugging.

Change-Id: I04a4c5abcfef5f3f604a2430da15a8b5125239af
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/352956
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
1 file changed