b3ee8901eb
Add new subclass for DDC specific behavior and move `compileGeneration()` implementation there. Change-Id: Id668b3550e80e1e1802ca64a0d0107b48f14aad9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/393220 Reviewed-by: Mark Zhou <markzipan@google.com> Reviewed-by: Morgan :) <davidmorgan@google.com> Commit-Queue: Nicholas Shahan <nshahan@google.com>