No longer work around issue 7761.
No longer work around issue 7761.

This also moves Pub's modified _OutputStreamConsumer class into pkg/http.

Review URL: https://codereview.chromium.org//11881030

git-svn-id: a0fc6a377c96b9059f80895148836233a16d98be@17034 260f80e4-7a28-3924-810f-c04153c831b5

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