Revert of Remove support for Alt-Svc/Alternate Protocol Probability

net/http/http_server_properties_impl.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_IMPL_H_
 #define NET_HTTP_HTTP_SERVER_PROPERTIES_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 72 matching lines @@
   bool GetSupportsSpdy(const HostPortPair& server) override;
   void SetSupportsSpdy(const HostPortPair& server, bool support_spdy) override;
   bool RequiresHTTP11(const HostPortPair& server) override;
   void SetHTTP11Required(const HostPortPair& server) override;
   void MaybeForceHTTP11(const HostPortPair& server,
                         SSLConfig* ssl_config) override;
   AlternativeServiceVector GetAlternativeServices(
       const HostPortPair& origin) override;
   bool SetAlternativeService(const HostPortPair& origin,
                              const AlternativeService& alternative_service,
+                             double alternative_probability,
                              base::Time expiration) override;
   bool SetAlternativeServices(const HostPortPair& origin,
                               const AlternativeServiceInfoVector&
                                   alternative_service_info_vector) override;
   void MarkAlternativeServiceBroken(
       const AlternativeService& alternative_service) override;
   void MarkAlternativeServiceRecentlyBroken(
       const AlternativeService& alternative_service) override;
   bool IsAlternativeServiceBroken(
       const AlternativeService& alternative_service) const override;
   bool WasAlternativeServiceRecentlyBroken(
       const AlternativeService& alternative_service) override;
   void ConfirmAlternativeService(
       const AlternativeService& alternative_service) override;
   void ClearAlternativeServices(const HostPortPair& origin) override;
   const AlternativeServiceMap& alternative_service_map() const override;
   scoped_ptr<base::Value> GetAlternativeServiceInfoAsValue() const override;
+  void SetAlternativeServiceProbabilityThreshold(double threshold) override;
   const SettingsMap& GetSpdySettings(
       const HostPortPair& host_port_pair) override;
   bool SetSpdySetting(const HostPortPair& host_port_pair,
                       SpdySettingsIds id,
                       SpdySettingsFlags flags,
                       uint32_t value) override;
   void ClearSpdySettings(const HostPortPair& host_port_pair) override;
   void ClearAllSpdySettings() override;
   const SpdySettingsMap& spdy_settings_map() const override;
   bool GetSupportsQuic(IPAddress* last_address) const override;
@@ skipping 55 matching lines @@
   SpdySettingsMap spdy_settings_map_;
   ServerNetworkStatsMap server_network_stats_map_;
   // Contains a map of servers which could share the same alternate protocol.
   // Map from a Canonical host/port (host is some postfix of host names) to an
   // actual origin, which has a plausible alternate protocol mapping.
   CanonicalHostMap canonical_host_to_origin_map_;
   // Contains list of suffixes (for exmaple ".c.youtube.com",
   // ".googlevideo.com", ".googleusercontent.com") of canonical hostnames.
   CanonicalSufficList canonical_suffixes_;
 
+  double alternative_service_probability_threshold_;
+
   QuicServerInfoMap quic_server_info_map_;
   size_t max_server_configs_stored_in_properties_;
 
   base::WeakPtrFactory<HttpServerPropertiesImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpServerPropertiesImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_SERVER_PROPERTIES_IMPL_H_