Add a library for manipulating stack traces.

Review URL: https://codereview.chromium.org//13102003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/stack_trace@20582 260f80e4-7a28-3924-810f-c04153c831b5
7 files changed
tree: 426ac5e6e9846bb83068560aefc5b9dc310b3bff
  1. pkgs/