Fix class implementing FormatException getting warnings.

Update mirrors-used-test count.

R=kustermann@google.com

Review URL: https://codereview.chromium.org//392563003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/source_maps@38182 260f80e4-7a28-3924-810f-c04153c831b5
2 files changed
tree: 804bf1fd760f8d857ee6b11cf27e378aa8246780
  1. pkgs/