Clean _PSNode always represent a scalar value
Clean _PSNode always represent a scalar value

Change-Id: Ia70a58fa7dc17e0bcb0bf1bebe1c7c2799225a01
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/219704
Auto-Submit: Jonas Jensen <c9327fa216ae2ef84df7c55b809d4ba270141b48@google.com>
Commit-Queue: Jonas Jensen <c9327fa216ae2ef84df7c55b809d4ba270141b48@google.com>
Reviewed-by: Phil Quitslund <3faecbdd7b7be83f493f037bf1d597e6bb9d0848@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk