Fix the OAuth2 documentation to use then rather than chain/transform.

Review URL: https://codereview.chromium.org//11826010

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@16828 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed
tree: 7a757c2053758045cd558fb316841c1f277fbe76
  1. lib/
  2. test/
  3. pubspec.yaml