This enables parsing and validation for tests that contain:
// ^^^
// [web] Some web-specific error.
This doesn't run those tests on DDC and dart2js yet, and the test
updating tool doesn't handle web tests yet. I'll do those in follow-up
patches.
Change-Id: Id06397a20a06c00e48801a16c01d5878e0264f6b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/146462
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Srujan Gaddam <srujzs@google.com>
Auto-Submit: Bob Nystrom <rnystrom@google.com>
