Comma operator on DSL statements now creates unscoped blocks

Change-Id: I9eb85f25431b2d59b26e8cf8f4a73b9e45faa916
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/398017
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
5 files changed