6570db562c
This reverts commit r26935. Failing in FF checked on type extension and IE9 on synchronous constructor upgrading, need to investigate. TBR BUG= Review URL: https://codereview.chromium.org//23567006 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@26938 260f80e4-7a28-3924-810f-c04153c831b5