Disable DMSAA on WebGL

Bug: skia:12081
Change-Id: I4f89c1f495538f58b68458b7ee30d22ba354e482
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/416684
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Adlai Holler <adlai@google.com>
1 file changed