Use linked hash map for broken alternative service queue.

net/http/http_server_properties.h

 // 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.
 
 #ifndef NET_HTTP_HTTP_SERVER_PROPERTIES_H_
 #define NET_HTTP_HTTP_SERVER_PROPERTIES_H_
 
 #include <map>
 #include <string>
 #include "base/basictypes.h"
@@ skipping 81 matching lines @@
 
   AlternativeService(AlternateProtocol protocol,
                      const std::string& host,
                      uint16 port)
       : protocol(protocol), host(host), port(port) {}
 
   AlternativeService(const AlternativeService& alternative_service) = default;
   AlternativeService& operator=(const AlternativeService& alternative_service) =
       default;
 
+  bool operator==(const AlternativeService& other) const {
+    return protocol == other.protocol && host == other.host &&
+           port == other.port;
+  }
+
   bool operator<(const AlternativeService& other) const {
     if (protocol != other.protocol)
       return protocol < other.protocol;
     if (host != other.host)
       return host < other.host;
     return port < other.port;
   }
 
   AlternateProtocol protocol;
   std::string host;
@@ skipping 174 matching lines @@
 
   virtual const ServerNetworkStatsMap& server_network_stats_map() const = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HttpServerProperties);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_SERVER_PROPERTIES_H_