Make my pkg packages warning-clean.
Make my pkg packages warning-clean.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//16097013

git-svn-id: a0fc6a377c96b9059f80895148836233a16d98be@23620 260f80e4-7a28-3924-810f-c04153c831b5

dart-lang/http,dart-lang/http,dart-lang/http,dart-lang/http,dart-lang/http,dart-lang/http,dart-lang/http,kasperpeulen/http,donny-dont/http,dart-lang/http