R=johnniwinther@google.com, rnystrom@google.com

Committed: https://code.google.com/p/dart/source/detail?r=41657
Reverted: https://code.google.com/p/dart/source/detail?r=41659

Review URL: https://codereview.chromium.org//700123002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41711 260f80e4-7a28-3924-810f-c04153c831b5