3cabc9a44f
Rename a couple of fields so that their purpose is more clear. Enhance a few comments to record information I had to work to discover. Change-Id: I9f9daa623ee4d2885d9831b59c40cccb7ab50ff7 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/420183 Reviewed-by: Phil Quitslund <pquitslund@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>