Revert "Make unittest follow the new package layout."
Revert "Make unittest follow the new package layout."

This reverts commit 38f7d16f373832a7bf889192af7845cb602aec01.

Review URL: https://codereview.chromium.org//10911318

git-svn-id: 29b42837285a5fdcb6c8ad0409bff8538fc60ed2@12400 260f80e4-7a28-3924-810f-c04153c831b5

astashov/logging,dart-lang/logging