Add components/network_session_configurator.

chrome/browser/io_thread.h

Index: chrome/browser/io_thread.h
diff --git a/chrome/browser/io_thread.h b/chrome/browser/io_thread.h
index 7a3fdadad0596f1a6bfcc1cd9b10b24e93df1066..f579f80bde2789146a928ed73a21316780db80a0 100644
--- a/chrome/browser/io_thread.h
+++ b/chrome/browser/io_thread.h
@@ -36,10 +36,6 @@ class PrefService;
 class PrefRegistrySimple;
 class SystemURLRequestContextGetter;
 
-namespace base {
-class CommandLine;
-}
-
 #if BUILDFLAG(ANDROID_JAVA_UI)
 namespace chrome {
 namespace android {
@@ -185,216 +181,6 @@ class IOThread : public content::BrowserThreadDelegate {
     std::unique_ptr<chrome_browser_net::DnsProbeService> dns_probe_service;
   };
 
-  // Helper class to configure HttpNetworkSession::Params and
-  // HttpServerProperties based on field trials, policy, and command line.
-  class NetworkSessionConfigurator {
-   public:
-    // Configure |params| based on field trials and policy arguments.
-    static void ParseFieldTrials(bool is_spdy_allowed_by_policy,
-                                 bool is_quic_allowed_by_policy,
-                                 net::HttpNetworkSession::Params* params);
-
-    // Configure |params| based on field trials, policy arguments,
-    // and command line.
-    static void ParseFieldTrialsAndCommandLine(
-        bool is_spdy_allowed_by_policy,
-        bool is_quic_allowed_by_policy,
-        net::HttpNetworkSession::Params* params);
-
-    // Returns true if QUIC should be enabled for data reduction proxy, either
-    // as a result of a field trial or a command line flag.
-    static bool ShouldEnableQuicForDataReductionProxy(
-        const base::CommandLine& command_line);
-
-   private:
-    // Map from name to value for all parameters associate with a field trial.
-    using VariationParameters = std::map<std::string, std::string>;
-
-    static void ParseFieldTrialsAndCommandLineInternal(
-        const base::CommandLine& command_line,
-        bool is_spdy_allowed_by_policy,
-        bool is_quic_allowed_by_policy,
-        net::HttpNetworkSession::Params* params);
-
-    // Configures Alternative Services based on command line options and the
-    // field trial group.
-    static void ConfigureAltSvcParams(const base::CommandLine& command_line,
-                                      base::StringPiece altsvc_trial_group,
-                                      net::HttpNetworkSession::Params* params);
-
-    // Configures QUIC options based on the flags in |command_line| as well as
-    // the QUIC field trial group and parameters.  Must be called before
-    // ConfigureSpdyParams.
-    static void ConfigureQuicParams(
-        const base::CommandLine& command_line,
-        base::StringPiece quic_trial_group,
-        const VariationParameters& quic_trial_params,
-        bool is_quic_allowed_by_policy,
-        net::HttpNetworkSession::Params* params);
-
-    // Configures available SPDY protocol versions and parameters based on
-    // command line flags as well as SPDY field trial group and parameters.
-    // Must be called after ConfigureQuicParams.
-    static void ConfigureSpdyParams(
-        const base::CommandLine& command_line,
-        base::StringPiece spdy_trial_group,
-        const VariationParameters& spdy_trial_params,
-        bool is_spdy_allowed_by_policy,
-        net::HttpNetworkSession::Params* params);
-
-    // Configure TCP FastOpen based on the field trial group.
-    static void ConfigureTCPFastOpenParams(
-        base::StringPiece tfo_trial_group,
-        net::HttpNetworkSession::Params* params);
-
-    // Configures NPN based on command line and the field trial group.
-    static void ConfigureNPNParams(const base::CommandLine& command_line,
-                                   base::StringPiece npn_trial_group,
-                                   net::HttpNetworkSession::Params* params);
-
-    // Configures the use of priority dependencies based on the field trial
-    // group.
-    static void ConfigurePriorityDependencies(
-        base::StringPiece priority_dependencies_trial_group,
-        net::HttpNetworkSession::Params* params);
-
-    // Returns true if QUIC should be disabled when a connection times out with
-    // open streams.
-    static bool ShouldDisableQuicWhenConnectionTimesOutWithOpenStreams(
-        const VariationParameters& quic_trial_params);
-
-    // Returns true if QUIC should be enabled, either as a result of a field
-    // trial or a command line flag.
-    static bool ShouldEnableQuic(const base::CommandLine& command_line,
-                                 base::StringPiece quic_trial_group,
-                                 bool quic_allowed_by_policy);
-
-    // Returns true if QUIC should be enabled for proxies, either as a result of
-    // a field trial or a command line flag.
-    static bool ShouldEnableQuicForProxies(
-        const base::CommandLine& command_line,
-        base::StringPiece quic_trial_group,
-        bool quic_allowed_by_policy);
-
-    // Returns true if the selection of the ephemeral port in bind() should be
-    // performed by Chromium, and false if the OS should select the port.  The
-    // OS option is used to prevent Windows from posting a security warning
-    // dialog.
-    static bool ShouldEnableQuicPortSelection(
-        const base::CommandLine& command_line);
-
-    // 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 base::CommandLine& command_line,
-        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 idle connection timeout for QUIC connections.  Returns 0 if
-    // there is an error parsing any of the options, or if the default value
-    // should be used.
-    static int GetQuicIdleConnectionTimeoutSeconds(
-        const VariationParameters& quic_trial_params);
-
-    // Returns true if PreConnect should be disabled if QUIC can do 0RTT.
-    static bool ShouldQuicDisablePreConnectIfZeroRtt(
-        const VariationParameters& quic_trial_params);
-
-    // Returns the set of hosts to whitelist for QUIC.
-    static std::unordered_set<std::string> GetQuicHostWhitelist(
-        const base::CommandLine& command_line,
-        const VariationParameters& quic_trial_params);
-
-    // Returns true if QUIC should migrate sessions when primary network
-    // changes.
-    static bool ShouldQuicMigrateSessionsOnNetworkChange(
-        const VariationParameters& quic_trial_params);
-
-    // Returns true if QUIC should migrate sessions early.
-    static bool ShouldQuicMigrateSessionsEarly(
-        const VariationParameters& quic_trial_params);
-
-    // Returns the maximum length for QUIC packets, based on any flags in
-    // |command_line| or 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 base::CommandLine& command_line,
-        const VariationParameters& quic_trial_params);
-
-    // Returns the QUIC versions specified by any flags in |command_line| or
-    // |quic_trial_params|.
-    static net::QuicVersion GetQuicVersion(
-        const base::CommandLine& command_line,
-        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
-    // |command_line| or |quic_trial_params|.
-    static net::QuicTagVector GetQuicConnectionOptions(
-        const base::CommandLine& command_line,
-        const VariationParameters& quic_trial_params);
-  };
-
   // |net_log| must either outlive the IOThread or be NULL.
   IOThread(PrefService* local_state,
            policy::PolicyService* policy_service,
@@ -450,8 +236,6 @@ class IOThread : public content::BrowserThreadDelegate {
   void Init() override;
   void CleanUp() override;
 
-  void InitializeNetworkOptions(const base::CommandLine& parsed_command_line);
-
   // Global state must be initialized on the IO thread, then this
   // method must be invoked on the UI thread.
   void InitSystemRequestContext();
@@ -517,7 +301,6 @@ class IOThread : public content::BrowserThreadDelegate {
   Globals* globals_;
 
   net::HttpNetworkSession::Params params_;
-  NetworkSessionConfigurator network_session_configurator_;
 
   // Observer that logs network changes to the ChromeNetLog.
   class LoggingNetworkChangeObserver;