Relanding 255326 "HttpServerProperties - Implement MRU for AlternateProtocolMap. Persist"

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"
+#include "base/containers/mru_cache.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/net_export.h"
 #include "net/http/http_pipelined_host_capability.h"
 #include "net/socket/next_proto.h"
 #include "net/spdy/spdy_framer.h"  // TODO(willchan): Reconsider this.
 
 namespace net {
 
@@ skipping 34 matching lines @@
   bool Equals(const PortAlternateProtocolPair& other) const {
     return port == other.port && protocol == other.protocol;
   }
 
   std::string ToString() const;
 
   uint16 port;
   AlternateProtocol protocol;
 };
 
-typedef std::map<HostPortPair, PortAlternateProtocolPair> AlternateProtocolMap;
+typedef base::MRUCache<
+    HostPortPair, PortAlternateProtocolPair> AlternateProtocolMap;
 typedef std::map<HostPortPair, SettingsMap> SpdySettingsMap;
 typedef std::map<HostPortPair,
         HttpPipelinedHostCapability> PipelineCapabilityMap;
 
 extern const char kAlternateProtocolHeader[];
 
 // The interface for setting/retrieving the HTTP server properties.
 // Currently, this class manages servers':
 // * SPDY support (based on NPN results)
 // * Alternate-Protocol support
@@ skipping 16 matching lines @@
 
   // Returns true if |server| supports SPDY.
   virtual bool SupportsSpdy(const HostPortPair& server) const = 0;
 
   // Add |server| into the persistent store. Should only be called from IO
   // thread.
   virtual void SetSupportsSpdy(const HostPortPair& server,
                                bool support_spdy) = 0;
 
   // Returns true if |server| has an Alternate-Protocol header.
-  virtual bool HasAlternateProtocol(const HostPortPair& server) const = 0;
+  virtual bool HasAlternateProtocol(const HostPortPair& server) = 0;
 
   // Returns the Alternate-Protocol and port for |server|.
   // HasAlternateProtocol(server) must be true.
   virtual PortAlternateProtocolPair GetAlternateProtocol(
-      const HostPortPair& server) const = 0;
+      const HostPortPair& server) = 0;
 
   // Sets the Alternate-Protocol for |server|.
   virtual void SetAlternateProtocol(const HostPortPair& server,
                                     uint16 alternate_port,
                                     AlternateProtocol alternate_protocol) = 0;
 
   // Sets the Alternate-Protocol for |server| to be BROKEN.
   virtual void SetBrokenAlternateProtocol(const HostPortPair& server) = 0;
 
   // Clears the Alternate-Protocol for |server|.
@@ skipping 40 matching lines @@
 
   virtual PipelineCapabilityMap GetPipelineCapabilityMap() const = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HttpServerProperties);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_SERVER_PROPERTIES_H_