54783db99c
When converting an await for map entry to an element, ensure that the element is properly marked async. This fixes failures on dart2js and DDK. Change-Id: I7566bc57728f1d734bb8932f15ea7a9e9487d39e Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/98565 Auto-Submit: Kevin Millikin <kmillikin@google.com> Reviewed-by: Dmitry Stefantsov <dmitryas@google.com> Commit-Queue: Dmitry Stefantsov <dmitryas@google.com>