After chatting offline, we decided we don't actually need
gridRowGap and gridColumnGap since the rowGap and columnGap
properties are the preferred names. Removing the deprecated
grid versions before it becomes a breaking change to do so,
and to keep dart:html bloat minimal.
Change-Id: I75a7de40a4bb1a5479723600987d19e7e42bf69c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/224700
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Riley Porter <rileyporter@google.com>
Riley Porter
8e0d5f98a3