aeb864a43f
This change basically consists of these steps: * Enable the incremental compiler to trace used inputs. * Translate used libraries into used dill inputs. * Output the list of used dills. Bug: #37788 Change-Id: I08cffe299166cf10e990c9e261f190afd25da8b1 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/112384 Commit-Queue: Jens Johansen <jensj@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com> Reviewed-by: Jake Macdonald <jakemac@google.com>