Fix 'part of' for mime package.

BUG=
R=kasperl@google.com

Review URL: https://codereview.chromium.org//17583010

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/mime@24331 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed
tree: 0a3bf96c31164c23995cbfd1c285386175546f2a
  1. lib/
  2. test/
  3. pubspec.yaml