Revert of Remove the code to store and load QUIC server configs in the disk cache.

components/network_session_configurator/network_session_configurator.cc

Index: components/network_session_configurator/network_session_configurator.cc
diff --git a/components/network_session_configurator/network_session_configurator.cc b/components/network_session_configurator/network_session_configurator.cc
index a0432839a1aea6fdffeeaf39fb2d2fd6d107a21c..4bb6f7758405e4cdc701432788a56139a48f8a06 100644
--- a/components/network_session_configurator/network_session_configurator.cc
+++ b/components/network_session_configurator/network_session_configurator.cc
@@ -134,10 +134,32 @@
   return net::ParseQuicConnectionOptions(it->second);
 }
 
+float GetQuicLoadServerInfoTimeoutSrttMultiplier(
+    const VariationParameters& quic_trial_params) {
+  double value;
+  if (base::StringToDouble(
+          GetVariationParam(quic_trial_params, "load_server_info_time_to_srtt"),
+          &value)) {
+    return static_cast<float>(value);
+  }
+  return 0.0f;
+}
+
+bool ShouldQuicEnableConnectionRacing(
+    const VariationParameters& quic_trial_params) {
+  return base::LowerCaseEqualsASCII(
+      GetVariationParam(quic_trial_params, "enable_connection_racing"), "true");
+}
+
 bool ShouldQuicEnableNonBlockingIO(
     const VariationParameters& quic_trial_params) {
   return base::LowerCaseEqualsASCII(
       GetVariationParam(quic_trial_params, "enable_non_blocking_io"), "true");
+}
+
+bool ShouldQuicDisableDiskCache(const VariationParameters& quic_trial_params) {
+  return base::LowerCaseEqualsASCII(
+      GetVariationParam(quic_trial_params, "disable_disk_cache"), "true");
 }
 
 bool ShouldForceHolBlocking(const VariationParameters& quic_trial_params) {
@@ -273,8 +295,18 @@
       ShouldRetryWithoutAltSvcOnQuicErrors(quic_trial_params);
 
   if (params->enable_quic) {
+    float load_server_info_timeout_srtt_multiplier =
+        GetQuicLoadServerInfoTimeoutSrttMultiplier(quic_trial_params);
+    if (load_server_info_timeout_srtt_multiplier != 0) {
+      params->quic_load_server_info_timeout_srtt_multiplier =
+          load_server_info_timeout_srtt_multiplier;
+    }
+    params->quic_enable_connection_racing =
+        ShouldQuicEnableConnectionRacing(quic_trial_params);
     params->quic_enable_non_blocking_io =
         ShouldQuicEnableNonBlockingIO(quic_trial_params);
+    params->quic_disable_disk_cache =
+        ShouldQuicDisableDiskCache(quic_trial_params);
     params->quic_force_hol_blocking = ShouldForceHolBlocking(quic_trial_params);
     params->quic_connection_options =
         GetQuicConnectionOptions(quic_trial_params);