Save pipelining capabilities for the most used hosts between sessions.

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 f697848e0ff32a12eab8eca035ec287067689aac..bf2cc2571c3936d264f5eacc2fedfb4f5b246f87 100644
--- a/net/http/http_server_properties_impl.h
+++ b/net/http/http_server_properties_impl.h
@@ -12,6 +12,7 @@
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/hash_tables.h"
+#include "base/memory/mru_cache.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/values.h"
 #include "net/base/host_port_pair.h"
@@ -42,6 +43,9 @@ class NET_EXPORT HttpServerPropertiesImpl
 
   void InitializeSpdySettingsServers(SpdySettingsMap* spdy_settings_map);
 
+  void InitializePipelineCapabilities(

[mmenke, 2011/12/02 21:52:10]

Might be nice to have a comment to make clear that it initializes the class
variable, and not the argument.

[James Simonsen, 2011/12/03 03:16:00]

Done.

+      PipelineCapabilityMap* pipeline_capability_map);

[mmenke, 2011/12/02 21:52:10]

Think you can make this argument const.

[James Simonsen, 2011/12/03 03:16:00]

Done.

+
   // Get the list of servers (host/port) that support SPDY.
   void GetSpdyServerList(base::ListValue* spdy_server_list) const;
 
@@ -106,7 +110,20 @@ class NET_EXPORT HttpServerPropertiesImpl
   // Returns all persistent SpdySettings.
   virtual const SpdySettingsMap& spdy_settings_map() const OVERRIDE;
 
+  virtual HttpPipelinedHost::Capability GetPipelineCapability(
+      const HostPortPair& origin) OVERRIDE;
+
+  virtual void SetPipelineCapability(
+      const HostPortPair& origin,
+      HttpPipelinedHost::Capability capability) OVERRIDE;
+
+  virtual void ClearPipelineCapabilities() OVERRIDE;
+
+  virtual PipelineCapabilityMap GetPipelineCapabilityMap() const OVERRIDE;
+
  private:
+  typedef base::MRUCache<
+      HostPortPair, HttpPipelinedHost::Capability> 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;
@@ -114,6 +131,7 @@ class NET_EXPORT HttpServerPropertiesImpl
 
   AlternateProtocolMap alternate_protocol_map_;
   SpdySettingsMap spdy_settings_map_;
+  CachedPipelineCapabilityMap pipeline_capability_map_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpServerPropertiesImpl);
 };