a31781f737
These are required for upcoming changes to the unsafe_html lint. Change-Id: I71018e3702b4c1e88b4b5071a150ad5b8ed99304 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/142560 Commit-Queue: Samuel Rawlins <srawlins@google.com> Reviewed-by: Konstantin Shcheglov <scheglov@google.com>