Switch inline variables to use a counter

Bug: skia:10424
Change-Id: Ic329b7de3a02034541094cd7b0cb4e458631e26f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/298556
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
5 files changed