Avoids the "re-encode HPACK as SPDY3" step.

net/tools/quic/quic_spdy_client_stream.h

 // Copyright (c) 2012 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_TOOLS_QUIC_QUIC_SPDY_CLIENT_STREAM_H_
 #define NET_TOOLS_QUIC_QUIC_SPDY_CLIENT_STREAM_H_
 
 #include <stddef.h>
 #include <sys/types.h>
 #include <string>
@@ skipping 22 matching lines @@
 
   // Override the base class to parse and store headers.
   void OnInitialHeadersComplete(bool fin, size_t frame_len) override;
 
   // Override the base class to parse and store headers.
   void OnInitialHeadersComplete(bool fin,
                                 size_t frame_len,
                                 const QuicHeaderList& header_list) override;
 
   // Override the base class to parse and store trailers.
-  void OnTrailingHeadersComplete(bool fin, size_t frame_len) override;
+  void OnTrailingHeadersComplete(bool fin,
+                                 size_t frame_len,
+                                 const QuicHeaderList& header_list) override;
 
   // Override the base class to handle creation of the push stream.
   void OnPromiseHeadersComplete(QuicStreamId promised_stream_id,
                                 size_t frame_len) override;
 
   // Override the base class to handle creation of the push stream.
   void OnPromiseHeaderList(QuicStreamId promised_id,
                            size_t frame_len,
                            const QuicHeaderList& header_list) override;
 
@@ skipping 46 matching lines @@
   bool allow_bidirectional_data_;
 
   QuicClientSession* session_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicSpdyClientStream);
 };
 
 }  // namespace net
 
 #endif  // NET_TOOLS_QUIC_QUIC_SPDY_CLIENT_STREAM_H_