1d768f3c75
This is a reland of commit 4b6a8f35b9
Original change's description:
> Reland "[cfe,corelib] Add class 'Record' to the core library"
>
> Part of https://github.com/dart-lang/sdk/issues/49713
>
> Change-Id: I56bfca49492d14bb561b32993fd9adfe775b7400
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/259583
> Reviewed-by: Johnni Winther <johnniwinther@google.com>
> Reviewed-by: Slava Egorov <vegorov@google.com>
> Commit-Queue: Chloe Stefantsova <cstefantsova@google.com>
Change-Id: Idaab98c028312ca36bd07f569374ca8b76151a02
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/260101
Reviewed-by: Slava Egorov <vegorov@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Chloe Stefantsova <cstefantsova@google.com>