Remove wrapInputStream and wrapOutputStream from pkg/http.
Remove wrapInputStream and wrapOutputStream from pkg/http.

Review URL: https://codereview.chromium.org//12372002

git-svn-id: a0fc6a377c96b9059f80895148836233a16d98be@19184 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,dart-lang/http,kasperpeulen/http,donny-dont/http