R=asiva@google.com, johnmccutchan@google.com Review URL: https://codereview.chromium.org/2483363002 .
be executed in generated code. R=koda@google.com, zra@google.com Review URL: https://codereview.chromium.org//677193002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@41332 260f80e4-7a28-3924-810f-c04153c831b5