Rename QuicDataStream to QuicSpdyStream. No behavior change.

net/quic/test_tools/quic_data_stream_peer.h

-// Copyright 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.
-
-#ifndef NET_QUIC_TEST_TOOLS_QUIC_DATA_STREAM_PEER_H_
-#define NET_QUIC_TEST_TOOLS_QUIC_DATA_STREAM_PEER_H_
-
-#include "base/basictypes.h"
-
-namespace net {
-
-class QuicDataStream;
-
-namespace test {
-
-class QuicDataStreamPeer {
- public:
-  static void SetHeadersDecompressed(QuicDataStream* stream,
-                                     bool headers_decompressed);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(QuicDataStreamPeer);
-};
-
-}  // namespace test
-
-}  // namespace net
-
-#endif  // NET_QUIC_TEST_TOOLS_QUIC_DATA_STREAM_PEER_H_