1bff4bead9
Enable concurrent marking for IA32. This removes the last write barrier relying on different alignment offsets for old and new space. TEST=ci Change-Id: Ib1c13124002392cf1c3ec264643325ec471a6918 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/262280 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Alexander Markov <alexmarkov@google.com>