Add components/network_session_configurator.

ios/chrome/browser/ios_chrome_io_thread.h

Index: ios/chrome/browser/ios_chrome_io_thread.h
diff --git a/ios/chrome/browser/ios_chrome_io_thread.h b/ios/chrome/browser/ios_chrome_io_thread.h
index f99b68f46e99323d399c51155d403593fa46d56b..ed4d28d26c53f04ade869a65d3e2a68b72464228 100644
--- a/ios/chrome/browser/ios_chrome_io_thread.h
+++ b/ios/chrome/browser/ios_chrome_io_thread.h
@@ -18,7 +18,6 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
-#include "base/strings/string_piece.h"
 #include "base/time/time.h"
 #include "components/prefs/pref_member.h"
 #include "components/ssl_config/ssl_config_service_manager.h"
@@ -43,7 +42,6 @@ class CTVerifier;
 class HostResolver;
 class HttpAuthHandlerFactory;
 class HttpAuthPreferences;
-class HttpNetworkSession;
 class HttpServerProperties;
 class HttpTransactionFactory;
 class HttpUserAgentSettings;
@@ -115,7 +113,6 @@ class IOSChromeIOThread : public web::WebThreadDelegate {
     // pins.
     std::unique_ptr<net::TransportSecurityState> transport_security_state;
     std::unique_ptr<net::CTVerifier> cert_transparency_verifier;
-    std::unique_ptr<net::CTPolicyEnforcer> ct_policy_enforcer;
     scoped_refptr<net::SSLConfigService> ssl_config_service;
     std::unique_ptr<net::HttpAuthPreferences> http_auth_preferences;
     std::unique_ptr<net::HttpAuthHandlerFactory> http_auth_handler_factory;
@@ -131,36 +128,6 @@ class IOSChromeIOThread : public web::WebThreadDelegate {
     std::unique_ptr<net::CookieStore> system_cookie_store;
     std::unique_ptr<net::HttpUserAgentSettings> http_user_agent_settings;
     std::unique_ptr<net::NetworkQualityEstimator> network_quality_estimator;
-    uint16_t testing_fixed_http_port;
-    uint16_t testing_fixed_https_port;
-    Optional<bool> enable_tcp_fast_open_for_ssl;
-
-    Optional<bool> enable_spdy31;
-    Optional<bool> enable_http2;
-    Optional<bool> parse_alternative_services;
-    Optional<bool> enable_alternative_service_with_different_host;
-
-    Optional<bool> enable_npn;
-
-    Optional<bool> enable_priority_dependencies;
-
-    Optional<bool> enable_quic;
-    Optional<bool> enable_quic_for_proxies;
-    Optional<bool> quic_always_require_handshake_confirmation;
-    Optional<bool> quic_disable_connection_pooling;
-    Optional<float> quic_load_server_info_timeout_srtt_multiplier;
-    Optional<bool> quic_enable_connection_racing;
-    Optional<bool> quic_enable_non_blocking_io;
-    Optional<bool> quic_disable_disk_cache;
-    Optional<bool> quic_prefer_aes;
-    Optional<int> quic_max_number_of_lossy_connections;
-    Optional<float> quic_packet_loss_threshold;
-    Optional<int> quic_socket_receive_buffer_size;
-    Optional<size_t> quic_max_packet_length;
-    net::QuicTagVector quic_connection_options;
-    Optional<std::string> quic_user_agent_id;
-    Optional<net::QuicVersionVector> quic_supported_versions;
-    Optional<bool> quic_close_sessions_on_ip_change;
   };
 
   // |net_log| must either outlive the IOSChromeIOThread or be NULL.
@@ -189,18 +156,11 @@ class IOSChromeIOThread : public web::WebThreadDelegate {
   // called on the IO thread.
   void ClearHostCache();
 
-  void InitializeNetworkSessionParams(net::HttpNetworkSession::Params* params);
+  const net::HttpNetworkSession::Params& NetworkSessionParams() const;
 
   base::TimeTicks creation_time() const;
 
-  // Returns true if QUIC should be enabled for data reduction proxy as a result
-  // of a field trial.
-  static bool ShouldEnableQuicForDataReductionProxy();
-
  private:
-  // Map from name to value for all parameters associate with a field trial.
-  typedef std::map<std::string, std::string> VariationParameters;
-
   // Provide SystemURLRequestContextGetter with access to
   // InitSystemRequestContext().
   friend class SystemURLRequestContextGetter;
@@ -211,32 +171,6 @@ class IOSChromeIOThread : public web::WebThreadDelegate {
   void Init() override;
   void CleanUp() override;
 
-  // Initializes |params| based on the settings in |globals|.
-  static void InitializeNetworkSessionParamsFromGlobals(
-      const Globals& globals,
-      net::HttpNetworkSession::Params* params);
-
-  void InitializeNetworkOptions();
-
-  // Sets up SSL TCP FastOpen if enabled via field trials.
-  void ConfigureSSLTCPFastOpen();
-
-  // Configures available SPDY protocol versions in |globals| based on the SPDY
-  // field trial group and parameters.
-  // Must be called after ConfigureQuicGlobals.
-  static void ConfigureSpdyGlobals(base::StringPiece quic_trial_group,
-                                   const VariationParameters& quic_trial_params,
-                                   Globals* globals);
-
-  // Configures Alternative Services in |globals| based on the field trial
-  // group.
-  static void ConfigureAltSvcGlobals(base::StringPiece altsvc_trial_group,
-                                     IOSChromeIOThread::Globals* globals);
-
-  // Configures NPN in |globals| based on the field trial group.
-  static void ConfigureNPNGlobals(base::StringPiece npn_trial_group,
-                                  Globals* globals);
-
   // Global state must be initialized on the IO thread, then this
   // method must be invoked on the UI thread.
   void InitSystemRequestContext();
@@ -254,105 +188,9 @@ class IOSChromeIOThread : public web::WebThreadDelegate {
 
   void ChangedToOnTheRecordOnIOThread();
 
-  // Configure whether we set HTTP/2 dependencies from the
-  // net::RequestPriority.
-  void ConfigurePriorityDependencies();
-
-  // Configures QUIC options based on the QUIC field trial group.
-  void ConfigureQuic();
-
-  // Configures QUIC options in |globals| based on the flags in |command_line|
-  // as well as the QUIC field trial group and parameters.
-  // Must be called before ConfigureSpdyGlobals.
-  static void ConfigureQuicGlobals(base::StringPiece quic_trial_group,
-                                   const VariationParameters& quic_trial_params,
-                                   Globals* globals);
-
-  // Returns true if QUIC should be enabled as a result of a field trial.
-  static bool ShouldEnableQuic(base::StringPiece quic_trial_group);
-
-  // Returns true if QUIC should be enabled for proxies as a result of a
-  // field trial.
-  static bool ShouldEnableQuicForProxies(base::StringPiece quic_trial_group);
-
-  // Returns true if QUIC should always require handshake confirmation during
-  // the QUIC handshake.
-  static bool ShouldQuicAlwaysRequireHandshakeConfirmation(
-      const VariationParameters& quic_trial_params);
-
-  // Returns true if QUIC should disable connection pooling.
-  static bool ShouldQuicDisableConnectionPooling(
-      const VariationParameters& quic_trial_params);
-
-  // Returns the ratio of time to load QUIC sever information from disk cache to
-  // 'smoothed RTT' based on field trial. Returns 0 if there is an error parsing
-  // the field trial params, or if the default value should be used.
-  static float GetQuicLoadServerInfoTimeoutSrttMultiplier(
-      const VariationParameters& quic_trial_params);
-
-  // Returns true if QUIC's connection racing should be enabled.
-  static bool ShouldQuicEnableConnectionRacing(
-      const VariationParameters& quic_trial_params);
-
-  // Returns true if QUIC's should use non-blocking IO.
-  static bool ShouldQuicEnableNonBlockingIO(
-      const VariationParameters& quic_trial_params);
-
-  // Returns true if QUIC shouldn't load QUIC server information from the disk
-  // cache.
-  static bool ShouldQuicDisableDiskCache(
-      const VariationParameters& quic_trial_params);
-
-  // Returns true if QUIC should prefer AES-GCN even without hardware support.
-  static bool ShouldQuicPreferAes(const VariationParameters& quic_trial_params);
-
-  // Returns true if QUIC should enable alternative services for different host.
-  static bool ShouldQuicEnableAlternativeServicesForDifferentHost(
-      const VariationParameters& quic_trial_params);
-
-  // Returns the maximum number of QUIC connections with high packet loss in a
-  // row after which QUIC should be disabled.  Returns 0 if the default value
-  // should be used.
-  static int GetQuicMaxNumberOfLossyConnections(
-      const VariationParameters& quic_trial_params);
-
-  // Returns the packet loss rate in fraction after which a QUIC connection is
-  // closed and is considered as a lossy connection. Returns 0 if the default
-  // value should be used.
-  static float GetQuicPacketLossThreshold(
-      const VariationParameters& quic_trial_params);
-
-  // Returns the size of the QUIC receive buffer to use, or 0 if
-  // the default should be used.
-  static int GetQuicSocketReceiveBufferSize(
-      const VariationParameters& quic_trial_params);
-
-  // Returns true if QUIC should close sessions when any of the client's
-  // IP addresses change.
-  static bool ShouldQuicCloseSessionsOnIpChange(
-      const VariationParameters& quic_trial_params);
-
-  // Returns the maximum length for QUIC packets, based on any flags in the
-  // field trial.  Returns 0 if there is an error parsing any of the options,
-  // or if the default value should be used.
-  static size_t GetQuicMaxPacketLength(
-      const VariationParameters& quic_trial_params);
-
-  // Returns the QUIC versions specified by any flags in |quic_trial_params|.
-  static net::QuicVersion GetQuicVersion(
-      const VariationParameters& quic_trial_params);
-
-  // Returns the QUIC version specified by |quic_version| or
-  // QUIC_VERSION_UNSUPPORTED if |quic_version| is invalid.
-  static net::QuicVersion ParseQuicVersion(const std::string& quic_version);
-
-  // Returns the QUIC connection options specified by any flags in
-  // |quic_trial_params|.
-  static net::QuicTagVector GetQuicConnectionOptions(
-      const VariationParameters& quic_trial_params);
-
   static net::URLRequestContext* ConstructSystemRequestContext(
       Globals* globals,
+      const net::HttpNetworkSession::Params& params,
       net::NetLog* net_log);
 
   // The NetLog is owned by the application context, to allow logging from other
@@ -369,6 +207,8 @@ class IOSChromeIOThread : public web::WebThreadDelegate {
 
   Globals* globals_;
 
+  net::HttpNetworkSession::Params params_;
+
   // Observer that logs network changes to the ChromeNetLog.
   class LoggingNetworkChangeObserver;
   std::unique_ptr<LoggingNetworkChangeObserver> network_change_observer_;