Enable AltSvc pooling by default.

net/http/http_network_session.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/http/http_network_session.h"
 
 #include <utility>
 
 #include "base/atomic_sequence_num.h"
 #include "base/compiler_specific.h"
@@ skipping 79 matching lines @@
       testing_fixed_https_port(0),
       enable_tcp_fast_open_for_ssl(false),
       enable_spdy_ping_based_connection_checking(true),
       spdy_default_protocol(kProtoUnknown),
       enable_spdy31(false),
       enable_http2(true),
       spdy_session_max_recv_window_size(kSpdySessionMaxRecvWindowSize),
       spdy_stream_max_recv_window_size(kSpdyStreamMaxRecvWindowSize),
       time_func(&base::TimeTicks::Now),
       parse_alternative_services(true),
-      enable_alternative_service_with_different_host(false),
+      enable_alternative_service_with_different_host(true),
       enable_npn(false),
       enable_priority_dependencies(true),
       enable_quic(false),
       disable_quic_on_timeout_with_open_streams(false),
       enable_quic_port_selection(true),
       quic_always_require_handshake_confirmation(false),
       quic_disable_connection_pooling(false),
       quic_load_server_info_timeout_srtt_multiplier(0.25f),
       quic_enable_connection_racing(false),
       quic_enable_non_blocking_io(false),
@@ skipping 293 matching lines @@
     case WEBSOCKET_SOCKET_POOL:
       return websocket_socket_pool_manager_.get();
     default:
       NOTREACHED();
       break;
   }
   return NULL;
 }
 
 }  // namespace net