Pretty print AlternativeService in test macros.

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 <iostream>
+
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/stringprintf.h"
 #include "net/socket/ssl_client_socket.h"
 #include "net/ssl/ssl_config.h"
 
 namespace net {
 
 const char kAlternateProtocolHeader[] = "Alternate-Protocol";
 
@@ skipping 86 matching lines @@
 std::string AlternativeService::ToString() const {
   return base::StringPrintf("%s %s:%d", AlternateProtocolToString(protocol),
                             host.c_str(), port);
 }
 
 std::string AlternativeServiceInfo::ToString() const {
   return base::StringPrintf("%s, p=%f", alternative_service.ToString().c_str(),
                             probability);
 }
 
+std::ostream& operator<<(std::ostream& os,
+                         const AlternativeService& alternative_service) {
+  return (os << alternative_service.ToString());
+}
+
 // static
 void HttpServerProperties::ForceHTTP11(SSLConfig* ssl_config) {
   ssl_config->next_protos.clear();
   ssl_config->next_protos.push_back(kProtoHTTP11);
 }
 
 }  // namespace net