QUIC - Allow cronet apps to specify how many server configs are to be

net/http/http_server_properties.h

Index: net/http/http_server_properties.h
diff --git a/net/http/http_server_properties.h b/net/http/http_server_properties.h
index 85b7285acb232a01ba9c9b9a8534e1b29164f185..cac13419a5abfb29dbb4d0c17e29fffce0332523 100644
--- a/net/http/http_server_properties.h
+++ b/net/http/http_server_properties.h
@@ -217,7 +217,7 @@ typedef base::MRUCache<HostPortPair, ServerNetworkStats> ServerNetworkStatsMap;
 typedef base::MRUCache<QuicServerId, std::string> QuicServerInfoMap;
 
 // Persist 5 QUIC Servers. This is mainly used by cronet.
-const int kMaxQuicServersToPersist = 5;
+const size_t kMaxQuicServersToPersist = 5;
 
 extern const char kAlternateProtocolHeader[];
 extern const char kAlternativeServiceHeader[];
@@ -381,6 +381,13 @@ class NET_EXPORT HttpServerProperties {
   // Returns all persistent QuicServerInfo objects.
   virtual const QuicServerInfoMap& quic_server_info_map() const = 0;
 
+  // Returns the number of server configs (QuicServerInfo objects) persisted.
+  virtual int number_of_server_configs_stored_in_properties() const = 0;
+
+  // Sets the number of server configs (QuicServerInfo objects) to be persisted.
+  virtual void set_number_of_server_configs_stored_in_properties(
+      int number_of_server_configs_stored_in_properties) = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(HttpServerProperties);
 };