SPDY - persist 300 most recently used servers that support SPDY to preferences file

net/http/http_server_properties_impl.h

Index: net/http/http_server_properties_impl.h
diff --git a/net/http/http_server_properties_impl.h b/net/http/http_server_properties_impl.h
index b03f357d413666e1098e1032f949efa9416856e1..13af9a92771aff61eef07496d5d540e8e7d878c2 100644
--- a/net/http/http_server_properties_impl.h
+++ b/net/http/http_server_properties_impl.h
@@ -34,7 +34,7 @@ class NET_EXPORT HttpServerPropertiesImpl
   HttpServerPropertiesImpl();
   virtual ~HttpServerPropertiesImpl();
 
-  // Initializes |spdy_servers_table_| with the servers (host/port) from
+  // Initializes |spdy_servers_map_| with the servers (host/port) from
   // |spdy_servers| that either support SPDY or not.
   void InitializeSpdyServers(std::vector<std::string>* spdy_servers,
                              bool support_spdy);
@@ -49,8 +49,10 @@ class NET_EXPORT HttpServerPropertiesImpl
   void InitializePipelineCapabilities(
       const PipelineCapabilityMap* pipeline_capability_map);
 
-  // Get the list of servers (host/port) that support SPDY.
-  void GetSpdyServerList(base::ListValue* spdy_server_list) const;
+  // Get the list of servers (host/port) that support SPDY. The max_size is the
+  // number of MRU servers that support SPDY that are to be returned.
+  void GetSpdyServerList(base::ListValue* spdy_server_list,
+                         size_t max_size) const;
 
   // Returns flattened string representation of the |host_port_pair|. Used by
   // unittests.
@@ -80,7 +82,7 @@ class NET_EXPORT HttpServerPropertiesImpl
   virtual void Clear() OVERRIDE;
 
   // Returns true if |server| supports SPDY.
-  virtual bool SupportsSpdy(const HostPortPair& server) const OVERRIDE;
+  virtual bool SupportsSpdy(const HostPortPair& server) OVERRIDE;
 
   // Add |server| into the persistent store.
   virtual void SetSupportsSpdy(const HostPortPair& server,
@@ -157,9 +159,9 @@ class NET_EXPORT HttpServerPropertiesImpl
  private:
   typedef base::MRUCache<
       HostPortPair, HttpPipelinedHostCapability> CachedPipelineCapabilityMap;
-  // |spdy_servers_table_| has flattened representation of servers (host/port
-  // pair) that either support or not support SPDY protocol.
-  typedef base::hash_map<std::string, bool> SpdyServerHostPortTable;
+  // |spdy_servers_map_| has flattened representation of servers (host, port)
+  // that either support or not support SPDY protocol.
+  typedef base::MRUCache<std::string, bool> SpdyServerHostPortMap;
   typedef std::map<HostPortPair, NetworkStats> ServerNetworkStatsMap;
   typedef std::map<HostPortPair, HostPortPair> CanonicalHostMap;
   typedef std::vector<std::string> CanonicalSufficList;
@@ -180,7 +182,7 @@ class NET_EXPORT HttpServerPropertiesImpl
   void ExpireBrokenAlternateProtocolMappings();
   void ScheduleBrokenAlternateProtocolMappingsExpiration();
 
-  SpdyServerHostPortTable spdy_servers_table_;
+  SpdyServerHostPortMap spdy_servers_map_;
 
   AlternateProtocolMap alternate_protocol_map_;
   BrokenAlternateProtocolList broken_alternate_protocol_list_;