[GCM] Add port 443 fallback logic and histograms

google_apis/gcm/tools/mcs_probe.cc

 // Copyright 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.
 //
 // A standalone tool for testing MCS connections and the MCS client on their
 // own.
 
 #include <cstddef>
 #include <cstdio>
 #include <string>
@@ skipping 272 matching lines @@
 }
 
 MCSProbe::~MCSProbe() {
   file_thread_.Stop();
 }
 
 void MCSProbe::Start() {
   file_thread_.Start();
   InitializeNetworkState();
   BuildNetworkSession();
+  std::vector<GURL> endpoints(1,
+                              GURL("https://" +
+                                   net::HostPortPair(server_host_,
+                                                     server_port_).ToString()));
   connection_factory_.reset(
-      new ConnectionFactoryImpl(GURL("https://" + net::HostPortPair(
-                                    server_host_, server_port_).ToString()),
+      new ConnectionFactoryImpl(endpoints,
                                 kDefaultBackoffPolicy,
                                 network_session_,
                                 &net_log_));
   gcm_store_.reset(
       new GCMStoreImpl(true,
                        gcm_store_path_,
                        file_thread_.message_loop_proxy()));
   mcs_client_.reset(new MCSClient("probe",
                                   &clock_,
                                   connection_factory_.get(),
@@ skipping 173 matching lines @@
 
   return 0;
 }
 
 }  // namespace
 }  // namespace gcm
 
 int main(int argc, char* argv[]) {
   return gcm::MCSProbeMain(argc, argv);
 }