Implement multiple alternative services per origin.

net/http/http_stream_factory.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_stream_factory.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ skipping 66 matching lines @@
         !session.IsProtocolEnabled(protocol)) {
       DVLOG(1) << kAlternateProtocolHeader
                << " header has unrecognized protocol: "
                << port_protocol_vector[1];
       is_valid = false;
       break;
     }
   }
 
   if (!is_valid || protocol == UNINITIALIZED_ALTERNATE_PROTOCOL) {
-    http_server_properties->ClearAlternativeService(http_host_port_pair);
+    http_server_properties->ClearAlternativeServices(http_host_port_pair);
     return;
   }
 
   HostPortPair host_port(http_host_port_pair);
   const HostMappingRules* mapping_rules = GetHostMappingRules();
   if (mapping_rules)
     mapping_rules->RewriteHost(&host_port);
 
-  http_server_properties->SetAlternativeService(
+  http_server_properties->ClearAlternativeServices(host_port);
+  http_server_properties->AddAlternativeService(
       host_port, AlternativeService(protocol, "", static_cast<uint16>(port)),
       probability);
 }
 
 GURL HttpStreamFactory::ApplyHostMappingRules(const GURL& url,
                                               HostPortPair* endpoint) {
   const HostMappingRules* mapping_rules = GetHostMappingRules();
   if (mapping_rules && mapping_rules->RewriteHost(endpoint)) {
     url::Replacements<char> replacements;
     const std::string port_str = base::IntToString(endpoint->port());
     replacements.SetPort(port_str.c_str(), url::Component(0, port_str.size()));
     replacements.SetHost(endpoint->host().c_str(),
                          url::Component(0, endpoint->host().size()));
     return url.ReplaceComponents(replacements);
   }
   return url;
 }
 
 HttpStreamFactory::HttpStreamFactory() {}
 
 }  // namespace net