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

net/tools/flip_server/spdy_interface.cc

 // 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.
 
 #include "net/tools/flip_server/spdy_interface.h"
 
 #include <algorithm>
 #include <string>
 
 #include "net/spdy/spdy_framer.h"
@@ skipping 221 matching lines @@
   SMInterface* interface = it->second;
   if (acceptor_->flip_handler_type_ == FLIP_HANDLER_PROXY)
     interface->ProcessWriteInput(nullptr, 0);
 }
 
 void SpdySM::OnStreamPadding(SpdyStreamId stream_id, size_t len) {
   VLOG(2) << ACCEPTOR_CLIENT_IDENT << "SpdySM: StreamPadding(" << stream_id
           << ", [" << len << "])";
 }
 
-SpdyHeadersHandlerInterface* SpdySM::OnHeaderFrameStart(
-    SpdyStreamId stream_id) {
-  LOG(FATAL) << ACCEPTOR_CLIENT_IDENT
-             << "SpdySM::OnHeaderFrameStart() not implemented.";
-  return nullptr;
-}
-
-void SpdySM::OnHeaderFrameEnd(SpdyStreamId stream_id, bool end_headers) {
-  LOG(FATAL) << ACCEPTOR_CLIENT_IDENT
-             << "SpdySM::OnHeaderFrameEnd() not implemented.";
-}
-
 void SpdySM::OnSynStream(SpdyStreamId stream_id,
                          SpdyStreamId associated_stream_id,
                          SpdyPriority priority,
                          bool fin,
                          bool unidirectional,
                          const SpdyHeaderBlock& headers) {
   std::string http_data;
   bool is_https_scheme;
   int ret = SpdyHandleNewStream(
       stream_id, priority, headers, http_data, &is_https_scheme);
@@ skipping 354 matching lines @@
   }
 }
 
 void SpdySM::CreateFramer(SpdyMajorVersion spdy_version) {
   DCHECK(!buffered_spdy_framer_);
   buffered_spdy_framer_.reset(new BufferedSpdyFramer(spdy_version));
   buffered_spdy_framer_->set_visitor(this);
 }
 
 }  // namespace net