In the process, I discovered multitests can't handle imports to
non-existent libraries. So I fixed that and cleaned up the code.
Change-Id: I9a8557e84f91ba7858bdf98f8732cd0ded55aa1a
Reviewed-on: https://dart-review.googlesource.com/52869
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Leaf Petersen <leafp@google.com>
Bob Nystrom