Improve DSLParser error recovery with interface blocks

We get better error reports by simply continuing in these cases.

Change-Id: I9e5fd4fe3afca601bb20a23376b6b098e909106f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/443238
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
1 file changed