R=jbrosenberg@google.com Review URL: https://chromereviews.googleplex.com/3559013 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@196 260f80e4-7a28-3924-810f-c04153c831b5
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@18 260f80e4-7a28-3924-810f-c04153c831b5