Add operator<<(ostream, AlternativeService) for test output formatting.

net/http/http_server_properties.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_server_properties.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/stringprintf.h"
 #include "net/socket/ssl_client_socket.h"
@@ skipping 74 matching lines @@
 
 std::string AlternativeServiceInfo::ToString() const {
   base::Time::Exploded exploded;
   expiration.LocalExplode(&exploded);
   return base::StringPrintf(
       "%s, expires %04d-%02d-%02d %02d:%02d:%02d",
       alternative_service.ToString().c_str(), exploded.year, exploded.month,
       exploded.day_of_month, exploded.hour, exploded.minute, exploded.second);
 }
 
+std::ostream& operator<<(std::ostream& os,
+                         const AlternativeService& alternative_service) {
+  os << alternative_service.ToString();
+  return os;
+}
+
 // static
 void HttpServerProperties::ForceHTTP11(SSLConfig* ssl_config) {
   ssl_config->alpn_protos.clear();
   ssl_config->alpn_protos.push_back(kProtoHTTP11);
 }
 
 }  // namespace net