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

net/net.gypi

 # Copyright 2014 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.
 
 # This file is shared between the regular GYP build, the NaCl GYP build, and
 # the GN build. For GN support, it must have no conditionals or anything like
 # that beyond the simple one-level-deep dictionary of values.
 {
   'variables': {
     # Subset of net source files that are compiled for NaCl (net_nacl target).
@@ skipping 1064 matching lines @@
       'socket/websocket_transport_client_socket_pool.cc',
       'socket/websocket_transport_client_socket_pool.h',
       'socket/websocket_transport_connect_sub_job.cc',
       'socket/websocket_transport_connect_sub_job.h',
       'spdy/bidirectional_stream_spdy_impl.cc',
       'spdy/bidirectional_stream_spdy_impl.h',
       'spdy/buffered_spdy_framer.cc',
       'spdy/buffered_spdy_framer.h',
       'spdy/fuzzing/hpack_fuzz_util.cc',
       'spdy/fuzzing/hpack_fuzz_util.h',
+      'spdy/header_coalescer.cc',
+      'spdy/header_coalescer.h',
       'spdy/hpack/hpack_constants.cc',
       'spdy/hpack/hpack_constants.h',
       'spdy/hpack/hpack_decoder.cc',
       'spdy/hpack/hpack_decoder.h',
       'spdy/hpack/hpack_encoder.cc',
       'spdy/hpack/hpack_encoder.h',
       'spdy/hpack/hpack_entry.cc',
       'spdy/hpack/hpack_entry.h',
       'spdy/hpack/hpack_header_table.cc',
       'spdy/hpack/hpack_header_table.h',
@@ skipping 1983 matching lines @@
       'third_party/nist-pkits/crls/requireExplicitPolicy5subCACRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy5subsubCACRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy5subsubsubCACRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy7CACRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy7subCARE2CRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy7subsubCARE2RE4CRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy7subsubsubCARE2RE4CRL.crl',
     ],
   }
 }