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: 965eb99b257a0350f91a5ab8607b3dea57271703@12400 260f80e4-7a28-3924-810f-c04153c831b5

iansf/args,dart-lang/args,ronlobo/args,seaneagan/args