c97e2554ee
This change is similar to https://dart-review.googlesource.com/c/sdk/+/456620 and https://dart-review.googlesource.com/c/sdk/+/458520 and prepares the CFE to emit new variable nodes when the experimental flag is on. Part of https://github.com/dart-lang/sdk/issues/61572 Change-Id: I78cff188c3a94de337d7114c7496552733b2e208 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/461421 Commit-Queue: Chloe Stefantsova <cstefantsova@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com>