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

net/quic/quic_headers_stream.cc

 // 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.
 
 #include "net/quic/quic_headers_stream.h"
 
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/stringprintf.h"
 #include "net/quic/quic_bug_tracker.h"
 #include "net/quic/quic_flags.h"
 #include "net/quic/quic_header_list.h"
-#include "net/quic/quic_headers_stream.h"
 #include "net/quic/quic_spdy_session.h"
 #include "net/quic/quic_time.h"
 
 using base::StringPiece;
 using net::HTTP2;
 using net::SpdyFrameType;
 using std::string;
 
 namespace net {
 
@@ skipping 382 matching lines @@
     if (promised_stream_id_ == kInvalidStreamId) {
       spdy_session_->OnStreamHeaders(stream_id_, StringPiece(header_data, len));
     } else {
       spdy_session_->OnPromiseHeaders(stream_id_,
                                       StringPiece(header_data, len));
     }
   }
 }
 
 void QuicHeadersStream::OnHeaderList(const QuicHeaderList& header_list) {
+  DVLOG(1) << "Received header list for stream " << stream_id_ << ": "
+           << header_list.DebugString();
   if (measure_headers_hol_blocking_time_) {
     if (prev_max_timestamp_ > cur_max_timestamp_) {
       // prev_max_timestamp_ > cur_max_timestamp_ implies that
       // headers from lower numbered streams actually came off the
       // wire after headers for the current stream, hence there was
       // HOL blocking.
       QuicTime::Delta delta = prev_max_timestamp_.Subtract(cur_max_timestamp_);
       DVLOG(1) << "stream " << stream_id_
                << ": Net.QuicSession.HeadersHOLBlockedTime "
                << delta.ToMilliseconds();
@@ skipping 37 matching lines @@
 }
 
 void QuicHeadersStream::SetHpackDecoderDebugVisitor(
     std::unique_ptr<HpackDebugVisitor> visitor) {
   spdy_framer_.SetDecoderHeaderTableDebugVisitor(
       std::unique_ptr<HeaderTableDebugVisitor>(new HeaderTableDebugVisitor(
           session()->connection()->helper()->GetClock(), std::move(visitor))));
 }
 
 }  // namespace net