Some more removals of dart:utf.

R=jmesserly@google.com, lrn@google.com, nweiz@google.com

Review URL: https://codereview.chromium.org//22909059

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/source_maps@26712 260f80e4-7a28-3924-810f-c04153c831b5
2 files changed
tree: a5d8e047f3e2fe66f39086017f8568083a909ddd
  1. pkgs/