Add HpackDecoder3, an adapter using HpackDecoder (in net/http2/hpack/decoder).

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 1328 matching lines @@
       '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_decoder_interface.h',
       'spdy/hpack/hpack_decoder2.cc',
       'spdy/hpack/hpack_decoder2.h',
+      'spdy/hpack/hpack_decoder3.cc',
+      'spdy/hpack/hpack_decoder3.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',
       'spdy/hpack/hpack_huffman_decoder.cc',
       'spdy/hpack/hpack_huffman_decoder.h',
       'spdy/hpack/hpack_huffman_table.cc',
       'spdy/hpack/hpack_huffman_table.h',
@@ skipping 750 matching lines @@
       'socket/unix_domain_client_socket_posix_unittest.cc',
       'socket/unix_domain_server_socket_posix_unittest.cc',
       'socket/websocket_endpoint_lock_manager_unittest.cc',
       'socket/websocket_transport_client_socket_pool_unittest.cc',
       'spdy/bidirectional_stream_spdy_impl_unittest.cc',
       'spdy/buffered_spdy_framer_unittest.cc',
       'spdy/fuzzing/hpack_fuzz_util_test.cc',
       'spdy/header_coalescer_test.cc',
       'spdy/hpack/hpack_decoder_test.cc',
       'spdy/hpack/hpack_decoder2_test.cc',
+      'spdy/hpack/hpack_decoder3_test.cc',
       'spdy/hpack/hpack_encoder_test.cc',
       'spdy/hpack/hpack_entry_test.cc',
       'spdy/hpack/hpack_header_table_test.cc',
       'spdy/hpack/hpack_huffman_decoder_test.cc',
       'spdy/hpack/hpack_huffman_table_test.cc',
       'spdy/hpack/hpack_input_stream_test.cc',
       'spdy/hpack/hpack_output_stream_test.cc',
       'spdy/hpack/hpack_round_trip_test.cc',
       'spdy/hpack/hpack_static_table_test.cc',
       'spdy/http2_priority_dependencies_unittest.cc',
@@ skipping 1457 matching lines @@
       'tools/domain_security_preload_generator/preloaded_state_generator.h',
       'tools/domain_security_preload_generator/spki_hash.cc',
       'tools/domain_security_preload_generator/spki_hash.h',
       'tools/domain_security_preload_generator/trie/trie_bit_buffer.cc',
       'tools/domain_security_preload_generator/trie/trie_bit_buffer.h',
       'tools/domain_security_preload_generator/trie/trie_writer.cc',
       'tools/domain_security_preload_generator/trie/trie_writer.h',
     ],
   }
 }