Fixes in smoke, which in turn should fix todomvc.
Fixes in smoke, which in turn should fix todomvc.

R=jmesserly@google.com

Review URL: https://codereview.chromium.org//180273004

git-svn-id: dae132d4ca6f88932ad8a9ec3641c81ad1592b72@33047 260f80e4-7a28-3924-810f-c04153c831b5

dart-lang/observe,dart-archive/observe