Enable NetProxyPreconnects experiment by default

net/spdy/chromium/spdy_test_util_common.cc

 // Copyright (c) 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/spdy/chromium/spdy_test_util_common.h"
 
 #include <stdint.h>
 
 #include <cstddef>
 #include <utility>
@@ skipping 332 matching lines @@
       enable_ip_pooling(true),
       enable_ping(false),
       enable_user_alternate_protocol_ports(false),
       enable_quic(false),
       enable_server_push_cancellation(false),
       session_max_recv_window_size(kDefaultInitialWindowSize),
       time_func(&base::TimeTicks::Now),
       enable_http2_alternative_service(false),
       net_log(nullptr),
       http_09_on_non_default_ports_enabled(false),
-      restrict_to_one_preconnect_for_proxies(false),
       quic_do_not_mark_as_broken_on_network_change(false) {
   // Note: The CancelledTransaction test does cleanup by running all
   // tasks in the message loop (RunAllPending).  Unfortunately, that
   // doesn't clean up tasks on the host resolver thread; and
   // TCPConnectJob is currently not cancellable.  Using synchronous
   // lookups allows the test to shutdown cleanly.  Until we have
   // cancellable TCPConnectJobs, use synchronous lookups.
   host_resolver->set_synchronous_mode(true);
   http2_settings[SETTINGS_INITIAL_WINDOW_SIZE] = kDefaultInitialWindowSize;
 }
@@ skipping 47 matching lines @@
   params.spdy_session_max_recv_window_size =
       session_deps->session_max_recv_window_size;
   params.http2_settings = session_deps->http2_settings;
   params.time_func = session_deps->time_func;
   params.proxy_delegate = session_deps->proxy_delegate.get();
   params.enable_http2_alternative_service =
       session_deps->enable_http2_alternative_service;
   params.net_log = session_deps->net_log;
   params.http_09_on_non_default_ports_enabled =
       session_deps->http_09_on_non_default_ports_enabled;
-  params.restrict_to_one_preconnect_for_proxies =
-      session_deps->restrict_to_one_preconnect_for_proxies;
   params.quic_do_not_mark_as_broken_on_network_change =
       session_deps->quic_do_not_mark_as_broken_on_network_change;
   return params;
 }
 
 class AllowAnyCertCTPolicyEnforcer : public CTPolicyEnforcer {
  public:
   AllowAnyCertCTPolicyEnforcer() {}
   ~AllowAnyCertCTPolicyEnforcer() override = default;
 
@@ skipping 728 matching lines @@
   headers[GetSchemeKey()] = scheme.c_str();
   headers[GetPathKey()] = path.c_str();
   if (content_length) {
     SpdyString length_str = base::Int64ToString(*content_length);
     headers["content-length"] = length_str;
   }
   return headers;
 }
 
 }  // namespace net