Add QuicStream and friends to QUIC code.

Fix bug in tests that caused failures.

Revert 165859
First Landed as 165858


Review URL: https://chromiumcodereview.appspot.com/11367082

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@165864 0039d316-1c4b-4281-b951-d872f2087c98