Update the debug trace format to a new version.

This update removes an unused field (the "slot" value was redundant,
since we always emitted arrays in order and there are no gaps). This CL
mostly exists to test out the ramifications of updating the trace
version and make sure things don't break when we do.

Change-Id: I456837db682b0085fc5afbbc0bcb62af3440c6e5
Bug: skia:12755
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/496607
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
2 files changed