Add components/network_session_configurator.

ios/chrome/browser/ios_chrome_io_thread.h

 // Copyright 2015 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 IOS_CHROME_BROWSER_IOS_CHROME_IO_THREAD_H_
 #define IOS_CHROME_BROWSER_IOS_CHROME_IO_THREAD_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #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"
 #include "ios/web/public/web_thread_delegate.h"
 #include "net/base/network_change_notifier.h"
 #include "net/http/http_network_session.h"
 
 class PrefProxyConfigTracker;
 class PrefService;
 class SystemURLRequestContextGetter;
 
 namespace base {
 class CommandLine;
 }  // namespace base
 
 namespace net {
 class CTPolicyEnforcer;
 class CertVerifier;
 class ChannelIDService;
 class CookieStore;
 class CTVerifier;
 class HostResolver;
 class HttpAuthHandlerFactory;
 class HttpAuthPreferences;
-class HttpNetworkSession;
 class HttpServerProperties;
 class HttpTransactionFactory;
 class HttpUserAgentSettings;
 class NetworkDelegate;
 class NetworkQualityEstimator;
 class ProxyConfigService;
 class ProxyService;
 class SSLConfigService;
 class TransportSecurityState;
 class URLRequestBackoffManager;
@@ skipping 51 matching lines @@
     std::unique_ptr<net::NetworkDelegate> system_network_delegate;
     std::unique_ptr<net::HostResolver> host_resolver;
     std::unique_ptr<net::CertVerifier> cert_verifier;
     // The ChannelIDService must outlive the HttpTransactionFactory.
     std::unique_ptr<net::ChannelIDService> system_channel_id_service;
     // This TransportSecurityState doesn't load or save any state. It's only
     // used to enforce pinning for system requests and will only use built-in
     // 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;
     std::unique_ptr<net::HttpServerProperties> http_server_properties;
     std::unique_ptr<net::URLRequestBackoffManager> url_request_backoff_manager;
     std::unique_ptr<net::ProxyService> system_proxy_service;
     std::unique_ptr<net::HttpNetworkSession> system_http_network_session;
     std::unique_ptr<net::HttpTransactionFactory>
         system_http_transaction_factory;
     std::unique_ptr<net::URLRequestJobFactory> system_url_request_job_factory;
     std::unique_ptr<net::URLRequestContext> system_request_context;
     SystemRequestContextLeakChecker system_request_context_leak_checker;
     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> 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<bool> quic_delay_tcp_race;
-    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.
   IOSChromeIOThread(PrefService* local_state, net_log::ChromeNetLog* net_log);
 
   ~IOSChromeIOThread() override;
 
   // Can only be called on the IO thread.
   Globals* globals();
 
   // Allows overriding Globals in tests where IOSChromeIOThread::Init() and
   // IOSChromeIOThread::CleanUp() are not called.  This allows for injecting
   // mocks into IOSChromeIOThread global objects.
   void SetGlobalsForTesting(Globals* globals);
 
   net_log::ChromeNetLog* net_log();
 
   // Handles changing to On The Record mode, discarding confidential data.
   void ChangedToOnTheRecord();
 
   // Returns a getter for the URLRequestContext.  Only called on the UI thread.
   net::URLRequestContextGetter* system_url_request_context_getter();
 
   // Clears the host cache.  Intended to be used to prevent exposing recently
   // visited sites on about:net-internals/#dns and about:dns pages.  Must be
   // called on the IO thread.
   void ClearHostCache();
 
-  void InitializeNetworkSessionParams(net::HttpNetworkSession::Params* params);
+  const net::HttpNetworkSession::Params& NetworkSessionParams() const;
 
   base::TimeTicks creation_time() const;
 
  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;
 
   // WebThreadDelegate implementation, runs on the IO thread.
   // This handles initialization and destruction of state that must
   // live on the IO thread.
   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();
 
   // Lazy initialization of system request context for
   // SystemURLRequestContextGetter. To be called on IO thread only
   // after global state has been initialized on the IO thread, and
   // SystemRequestContext state has been initialized on the UI thread.
   void InitSystemRequestContextOnIOThread();
 
   void CreateDefaultAuthHandlerFactory();
 
   // Returns an SSLConfigService instance.
   net::SSLConfigService* GetSSLConfigService();
 
   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 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 delay TCP connection when QUIC works.
-  static bool ShouldQuicDelayTcpRace(
-      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
   // threads during shutdown, but is used most frequently on the IO thread.
   net_log::ChromeNetLog* net_log_;
 
   // These member variables are basically global, but their lifetimes are tied
   // to the IOSChromeIOThread.  IOSChromeIOThread owns them all, despite not
   // using scoped_ptr. This is because the destructor of IOSChromeIOThread runs
   // on the wrong thread.  All member variables should be deleted in CleanUp().
 
   // These member variables are initialized in Init() and do not change for the
   // lifetime of the IO thread.
 
   Globals* globals_;
 
+  net::HttpNetworkSession::Params params_;
+
   // Observer that logs network changes to the ChromeNetLog.
   class LoggingNetworkChangeObserver;
   std::unique_ptr<LoggingNetworkChangeObserver> network_change_observer_;
 
   // This is an instance of the default SSLConfigServiceManager for the current
   // platform and it gets SSL preferences from local_state object.
   std::unique_ptr<ssl_config::SSLConfigServiceManager>
       ssl_config_service_manager_;
 
   // These member variables are initialized by a task posted to the IO thread,
   // which gets posted by calling certain member functions of IOSChromeIOThread.
   std::unique_ptr<net::ProxyConfigService> system_proxy_config_service_;
 
   std::unique_ptr<PrefProxyConfigTracker> pref_proxy_config_tracker_;
 
   scoped_refptr<net::URLRequestContextGetter>
       system_url_request_context_getter_;
 
   const base::TimeTicks creation_time_;
 
   base::WeakPtrFactory<IOSChromeIOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOSChromeIOThread);
 };
 
 #endif  // IOS_CHROME_BROWSER_IOS_CHROME_IO_THREAD_H_