don't parse svgs we won't run

Change-Id: Ia3b11e5f785fb452a66067c0c063bc2354790978
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/340976
Reviewed-by: Florin Malita <fmalita@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed