Break out the basic reliable QUIC stream functionality from the

net/quic/test_tools/quic_data_stream_peer.cc

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/quic/test_tools/quic_data_stream_peer.h"
+
+#include "net/quic/quic_data_stream.h"
+
+namespace net {
+namespace test {
+
+// static
+void QuicDataStreamPeer::SetHeadersDecompressed(QuicDataStream* stream,
+                                                bool headers_decompressed) {
+  stream->headers_decompressed_ = headers_decompressed;
+}
+
+}  // namespace test
+}  // namespace net