158d90d50f
postponed to run time (issue 9106). Eliminate bound check at compile time in some cases. Fix bound checking of mutually referencing bounds. Added test. Review URL: https://codereview.chromium.org//13653005 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@20938 260f80e4-7a28-3924-810f-c04153c831b5