Widen the stack_trace SDK constraint.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//603623005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/stack_trace@40701 260f80e4-7a28-3924-810f-c04153c831b5
2 files changed
tree: d7c0344ac4f00bd188eacda736fce0ce4922aa1b
  1. pkgs/