QUIC - Persist 1000 MRU alternate protocols to preferences file.

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 {
 
+enum AlternateProtocolExperiment {
+  // 200 alternate_protocol servers are loaded (persisted 200 MRU servers).
+  ALTERNATE_PROTOCOL_NOT_PART_OF_EXPERIMENT = 0,
+  // 200 alternate_protocol servers are loaded (persisted 1000 MRU servers).
+  ALTERNATE_PROTOCOL_TRUNCATED_200_SERVERS,
+  // 1000 alternate_protocol servers are loaded (persisted 1000 MRU servers).
+  ALTERNATE_PROTOCOL_TRUNCATED_1000_SERVERS,
+};
+
 enum AlternateProtocolUsage {
   // Alternate Protocol was used without racing a normal connection.
   ALTERNATE_PROTOCOL_USAGE_NO_RACE = 0,
   // Alternate Protocol was used by winning a race with a normal connection.
   ALTERNATE_PROTOCOL_USAGE_WON_RACE = 1,
   // Alternate Protocol was not used by losing a race with a normal connection.
   ALTERNATE_PROTOCOL_USAGE_LOST_RACE = 2,
   // Alternate Protocol was not used because no Alternate-Protocol information
   // was available when the request was issued, but an Alternate-Protocol header
   // was present in the response.
   ALTERNATE_PROTOCOL_USAGE_MAPPING_MISSING = 3,
   // Alternate Protocol was not used because it was marked broken.
   ALTERNATE_PROTOCOL_USAGE_BROKEN = 4,
   // Maximum value for the enum.
   ALTERNATE_PROTOCOL_USAGE_MAX,
 };
 
-// Log a histogram to reflect |usage|.
-NET_EXPORT void HistogramAlternateProtocolUsage(AlternateProtocolUsage usage);
+// Log a histogram to reflect |usage| and |alternate_protocol_experiment|.
+NET_EXPORT void HistogramAlternateProtocolUsage(
+    AlternateProtocolUsage usage,
+    AlternateProtocolExperiment alternate_protocol_experiment);
 
 enum BrokenAlternateProtocolLocation {
   BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB = 0,
   BROKEN_ALTERNATE_PROTOCOL_LOCATION_QUIC_STREAM_FACTORY = 1,
   BROKEN_ALTERNATE_PROTOCOL_LOCATION_MAX,
 };
 
 // Log a histogram to reflect |location|.
 NET_EXPORT void HistogramBrokenAlternateProtocolLocation(
     BrokenAlternateProtocolLocation location);
@@ skipping 99 matching lines @@
 
   // Confirms that Alternate-Protocol for |server| is working.
   virtual void ConfirmAlternateProtocol(const HostPortPair& server) = 0;
 
   // Clears the Alternate-Protocol for |server|.
   virtual void ClearAlternateProtocol(const HostPortPair& server) = 0;
 
   // Returns all Alternate-Protocol mappings.
   virtual const AlternateProtocolMap& alternate_protocol_map() const = 0;
 
+  virtual void SetAlternateProtocolExperiment(
+      AlternateProtocolExperiment experiment) = 0;
+
+  virtual AlternateProtocolExperiment GetAlternateProtocolExperiment()
+      const = 0;
+
   // Gets a reference to the SettingsMap stored for a host.
   // If no settings are stored, returns an empty SettingsMap.
   virtual const SettingsMap& GetSpdySettings(
       const HostPortPair& host_port_pair) = 0;
 
   // Saves an individual SPDY setting for a host. Returns true if SPDY setting
   // is to be persisted.
   virtual bool SetSpdySetting(const HostPortPair& host_port_pair,
                               SpdySettingsIds id,
                               SpdySettingsFlags flags,
@@ skipping 25 matching lines @@
 
   virtual PipelineCapabilityMap GetPipelineCapabilityMap() const = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HttpServerProperties);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_SERVER_PROPERTIES_H_