I hit this DCHECK when I run debug build on slate. (I had to disable two other DCHECKs to reach this tho)

[14837:14837:1107/064455.768752:FATAL:arc_net_host_impl.cc(68)] Check failed: false. Required parameter Type was not found.
#0 0x7f5cddbe7e38 base::debug::StackTrace::StackTrace()
#1 0x7f5cdd8b2bdc base::debug::StackTrace::StackTrace()
#2 0x7f5cdd92489a logging::LogMessage::~LogMessage()
#3 0x5c592f634303 (anonymous namespace)::GetStringFromOncDictionary()
#4 0x5c592f63556c (anonymous namespace)::TranslateONCIPConfig()
#5 0x5c592f63453a (anonymous namespace)::TranslateONCIPConfigs()
#6 0x5c592f62a99c (anonymous namespace)::TranslateONCConfiguration()
#7 0x5c592f62e6ad (anonymous namespace)::GetDefaultNetworkSuccessCallback()
#8 0x5c5928194b9a _ZN4base8internal13FunctorTraitsIPFvNS_12OnceCallbackIFvN10extensions23declarative_net_request26IndexAndPersistRulesResultEEEERKNSt3__112basic_stringIcNS8_11char_traitsIcEENS8_9allocatorIcEEEESG_EvE6InvokeIRKSI_JRKNS_17RepeatingCallbackIS6_EESG_SG_EEEvOT_DpOT0_
#9 0x5c592f642add _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIRKPFvNS_12OnceCallbackIFvN4mojo9StructPtrIN3arc5mojom20NetworkConfigurationEEESA_EEERKNSt3__112basic_stringIcNSD_11char_traitsIcEENSD_9allocatorIcEEEERKNS_15DictionaryValueEEJRKNS_17RepeatingCallbackISB_EESL_SO_EEEvOT_DpOT0_
#10 0x5c592f642a80 _ZN4base8internal7InvokerINS0_9BindStateIPFvNS_12OnceCallbackIFvN4mojo9StructPtrIN3arc5mojom20NetworkConfigurationEEES9_EEERKNSt3__112basic_stringIcNSC_11char_traitsIcEENSC_9allocatorIcEEEERKNS_15DictionaryValueEEJNS_17RepeatingCallbackISA_EEEEEFvSK_SN_EE7RunImplIRKSP_RKNSC_5tupleIJSR_EEEJLm0EEEEvOT_OT0_NSC_16integer_sequenceImJXspT1_EEEESK_SN_
#11 0x5c592f6429a4 _ZN4base8internal7InvokerINS0_9BindStateIPFvNS_12OnceCallbackIFvN4mojo9StructPtrIN3arc5mojom20NetworkConfigurationEEES9_EEERKNSt3__112basic_stringIcNSC_11char_traitsIcEENSC_9allocatorIcEEEERKNS_15DictionaryValueEEJNS_17RepeatingCallbackISA_EEEEEFvSK_SN_EE3RunEPNS0_13BindStateBaseESK_SN_
#12 0x7f5cca668110 _ZNKR4base17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEES9_EE3RunES9_S9_
#13 0x7f5cca7b285a chromeos::ManagedNetworkConfigurationHandlerImpl::SendProperties()
#14 0x7f5cca7c1108 _ZN4base8internal13FunctorTraitsIMN8chromeos38ManagedNetworkConfigurationHandlerImplEFvRKNSt3__112basic_stringIcNS4_11char_traitsIcEENS4_9allocatorIcEEEERKNS_17RepeatingCallbackIFvSC_RKNS_15DictionaryValueEEEERKNSD_IFvSC_NS4_10unique_ptrISE_NS4_14default_deleteISE_EEEEEEESC_SO_EvE6InvokeISU_RKNS_7WeakPtrIS3_EEJSC_SK_SS_SC_SO_EEEvT_OT0_DpOT1_
#15 0x7f5cca7c0e8c _ZN4base8internal12InvokeHelperILb1EvE8MakeItSoIRKMN8chromeos38ManagedNetworkConfigurationHandlerImplEFvRKNSt3__112basic_stringIcNS6_11char_traitsIcEENS6_9allocatorIcEEEERKNS_17RepeatingCallbackIFvSE_RKNS_15DictionaryValueEEEERKNSF_IFvSE_NS6_10unique_ptrISG_NS6_14default_deleteISG_EEEEEEESE_SQ_ERKNS_7WeakPtrIS5_EEJSE_SM_SU_SE_SQ_EEEvOT_OT0_DpOT1_
#16 0x7f5cca7c0d98 _ZN4base8internal7InvokerINS0_9BindStateIMN8chromeos38ManagedNetworkConfigurationHandlerImplEFvRKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEERKNS_17RepeatingCallbackIFvSD_RKNS_15DictionaryValueEEEERKNSE_IFvSD_NS5_10unique_ptrISF_NS5_14default_deleteISF_EEEEEEESD_SP_EJNS_7WeakPtrIS4_EESB_SJ_SR_EEESQ_E7RunImplIRKSV_RKNS5_5tupleIJSX_SB_SJ_SR_EEEJLm0ELm1ELm2ELm3EEEEvOT_OT0_NS5_16integer_sequenceImJXspT1_EEEESD_OSP_
#17 0x7f5cca7c0b94 _ZN4base8internal7InvokerINS0_9BindStateIMN8chromeos38ManagedNetworkConfigurationHandlerImplEFvRKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEERKNS_17RepeatingCallbackIFvSD_RKNS_15DictionaryValueEEEERKNSE_IFvSD_NS5_10unique_ptrISF_NS5_14default_deleteISF_EEEEEEESD_SP_EJNS_7WeakPtrIS4_EESB_SJ_SR_EEESQ_E3RunEPNS0_13BindStateBaseESD_OSP_
#18 0x7f5cca7bffdd _ZNKR4base17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEENS1_10unique_ptrINS_15DictionaryValueENS1_14default_deleteISB_EEEEEE3RunES9_SE_
#19 0x7f5cca7b0ca6 chromeos::ManagedNetworkConfigurationHandlerImpl::GetPropertiesCallback()
#20 0x7f5cca7c1d07 _ZN4base8internal13FunctorTraitsIMN8chromeos38ManagedNetworkConfigurationHandlerImplEFvNS_17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEENS5_10unique_ptrINS_15DictionaryValueENS5_14default_deleteISF_EEEEEEESD_RKSF_EvE6InvokeISO_RKNS_7WeakPtrIS3_EEJRKSK_SD_SM_EEEvT_OT0_DpOT1_
#21 0x7f5cca7c1c15 _ZN4base8internal12InvokeHelperILb1EvE8MakeItSoIRKMN8chromeos38ManagedNetworkConfigurationHandlerImplEFvNS_17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS7_11char_traitsIcEENS7_9allocatorIcEEEENS7_10unique_ptrINS_15DictionaryValueENS7_14default_deleteISH_EEEEEEESF_RKSH_ERKNS_7WeakPtrIS5_EEJRKSM_SF_SO_EEEvOT_OT0_DpOT1_
#22 0x7f5cca7c1b70 _ZN4base8internal7InvokerINS0_9BindStateIMN8chromeos38ManagedNetworkConfigurationHandlerImplEFvNS_17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS6_11char_traitsIcEENS6_9allocatorIcEEEENS6_10unique_ptrINS_15DictionaryValueENS6_14default_deleteISG_EEEEEEESE_RKSG_EJNS_7WeakPtrIS4_EESL_EEEFvSE_SN_EE7RunImplIRKSP_RKNS6_5tupleIJSR_SL_EEEJLm0ELm1EEEEvOT_OT0_NS6_16integer_sequenceImJXspT1_EEEESE_SN_
#23 0x7f5cca7c1a54 _ZN4base8internal7InvokerINS0_9BindStateIMN8chromeos38ManagedNetworkConfigurationHandlerImplEFvNS_17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS6_11char_traitsIcEENS6_9allocatorIcEEEENS6_10unique_ptrINS_15DictionaryValueENS6_14default_deleteISG_EEEEEEESE_RKSG_EJNS_7WeakPtrIS4_EESL_EEEFvSE_SN_EE3RunEPNS0_13BindStateBaseESE_SN_
#24 0x7f5cca668110 _ZNKR4base17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS1_11char_traitsIcEENS1_9allocatorIcEEEES9_EE3RunES9_S9_
#25 0x7f5cca7ee9ca chromeos::NetworkConfigurationHandler::GetPropertiesCallback()
#26 0x7f5cca7f9f8f _ZN4base8internal13FunctorTraitsIMN8chromeos27NetworkConfigurationHandlerEFvRKNS_17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEERKNS_15DictionaryValueEEEERKNS4_IFvSD_NS5_10unique_ptrISE_NS5_14default_deleteISE_EEEEEEESD_NS2_20DBusMethodCallStatusESG_EvE6InvokeISV_RKNS_7WeakPtrIS3_EEJSK_SS_SD_ST_SG_EEEvT_OT0_DpOT1_
#27 0x7f5cca7f9e8c _ZN4base8internal12InvokeHelperILb1EvE8MakeItSoIRKMN8chromeos27NetworkConfigurationHandlerEFvRKNS_17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS7_11char_traitsIcEENS7_9allocatorIcEEEERKNS_15DictionaryValueEEEERKNS6_IFvSF_NS7_10unique_ptrISG_NS7_14default_deleteISG_EEEEEEESF_NS4_20DBusMethodCallStatusESI_ERKNS_7WeakPtrIS5_EEJSM_SU_SF_SV_SI_EEEvOT_OT0_DpOT1_
#28 0x7f5cca7f9d98 _ZN4base8internal7InvokerINS0_9BindStateIMN8chromeos27NetworkConfigurationHandlerEFvRKNS_17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS6_11char_traitsIcEENS6_9allocatorIcEEEERKNS_15DictionaryValueEEEERKNS5_IFvSE_NS6_10unique_ptrISF_NS6_14default_deleteISF_EEEEEEESE_NS3_20DBusMethodCallStatusESH_EJNS_7WeakPtrIS4_EESJ_SR_SC_EEEFvSU_SH_EE7RunImplIRKSW_RKNS6_5tupleIJSY_SJ_SR_SC_EEEJLm0ELm1ELm2ELm3EEEEvOT_OT0_NS6_16integer_sequenceImJXspT1_EEEEOSU_SH_
#29 0x7f5cca7f9b72 _ZN4base8internal7InvokerINS0_9BindStateIMN8chromeos27NetworkConfigurationHandlerEFvRKNS_17RepeatingCallbackIFvRKNSt3__112basic_stringIcNS6_11char_traitsIcEENS6_9allocatorIcEEEERKNS_15DictionaryValueEEEERKNS5_IFvSE_NS6_10unique_ptrISF_NS6_14default_deleteISF_EEEEEEESE_NS3_20DBusMethodCallStatusESH_EJNS_7WeakPtrIS4_EESJ_SR_SC_EEEFvSU_SH_EE3RunEPNS0_13BindStateBaseESU_SH_
#30 0x7f5cca3acfa8 _ZNKR4base17RepeatingCallbackIFvN8chromeos11attestation17AttestationStatusERKNSt3__112basic_stringIcNS4_11char_traitsIcEENS4_9allocatorIcEEEEEE3RunES3_SC_
#31 0x7f5cca701682 _ZN4base8internal13FunctorTraitsINS_17RepeatingCallbackIFvN8chromeos20DBusMethodCallStatusERKNS_15DictionaryValueEEEEvE6InvokeIRKS9_JRKS4_S7_EEEvOT_DpOT0_
#32 0x7f5cca70156d _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIRKNS_17RepeatingCallbackIFvN8chromeos20DBusMethodCallStatusERKNS_15DictionaryValueEEEEJRKS6_S9_EEEvOT_DpOT0_
#33 0x7f5cca701520 _ZN4base8internal7InvokerINS0_9BindStateINS_17RepeatingCallbackIFvN8chromeos20DBusMethodCallStatusERKNS_15DictionaryValueEEEEJS5_EEEFvS8_EE7RunImplIRKSA_RKNSt3__15tupleIJS5_EEEJLm0EEEEvOT_OT0_NSH_16integer_sequenceImJXspT1_EEEES8_
#34 0x7f5cca701454 _ZN4base8internal7InvokerINS0_9BindStateINS_17RepeatingCallbackIFvN8chromeos20DBusMethodCallStatusERKNS_15DictionaryValueEEEEJS5_EEEFvS8_EE3RunEPNS0_13BindStateBaseES8_
#35 0x7f5cca3a2b0d _ZNKR4base17RepeatingCallbackIFvRKNS0_IFvvEEEEE3RunES4_
#36 0x7f5cca6ead05 chromeos::(anonymous namespace)::OnDictionaryValueMethodWithErrorCallback()
#37 0x7f5cca6ef6bf _ZN4base8internal13FunctorTraitsIPFvPN8chromeos17ShillClientHelper9RefHolderERKNS_17RepeatingCallbackIFvRKN4dbus10ObjectPathEEEERKNS6_IFvRKNSt3__112basic_stringIcNSF_11char_traitsIcEENSF_9allocatorIcEEEESN_EEEPNS7_8ResponseEEvE6InvokeISV_JS5_SC_SP_ST_EEEvOT_DpOT0_
#38 0x7f5cca6ef63d _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIPFvPN8chromeos17ShillClientHelper9RefHolderERKNS_17RepeatingCallbackIFvRKN4dbus10ObjectPathEEEERKNS8_IFvRKNSt3__112basic_stringIcNSH_11char_traitsIcEENSH_9allocatorIcEEEESP_EEEPNS9_8ResponseEEJS7_SE_SR_SV_EEEvOT_DpOT0_
#39 0x7f5cca6f167c _ZN4base8internal7InvokerINS0_9BindStateIPFvPN8chromeos17ShillClientHelper9RefHolderERKNS_17RepeatingCallbackIFvRKNS_15DictionaryValueEEEERKNS7_IFvRKNSt3__112basic_stringIcNSF_11char_traitsIcEENSF_9allocatorIcEEEESN_EEEPN4dbus8ResponseEEJNS0_12OwnedWrapperIS5_EESC_SP_EEEFvSU_EE7RunImplISW_NSF_5tupleIJSY_SC_SP_EEEJLm0ELm1ELm2EEEEvOT_OT0_NSF_16integer_sequenceImJXspT1_EEEEOSU_
#40 0x7f5cca6f14e6 _ZN4base8internal7InvokerINS0_9BindStateIPFvPN8chromeos17ShillClientHelper9RefHolderERKNS_17RepeatingCallbackIFvRKNS_15DictionaryValueEEEERKNS7_IFvRKNSt3__112basic_stringIcNSF_11char_traitsIcEENSF_9allocatorIcEEEESN_EEEPN4dbus8ResponseEEJNS0_12OwnedWrapperIS5_EESC_SP_EEEFvSU_EE7RunOnceEPNS0_13BindStateBaseESU_
#41 0x7f5cca26ee9f _ZNO4base12OnceCallbackIFvP15DBusPendingCallEE3RunES2_
#42 0x7f5cca26d96c dbus::ObjectProxy::CallMethodWithErrorCallback()::$_0::operator()()
#43 0x7f5cca26d8f3 _ZN4base8internal13FunctorTraitsIZN4dbus11ObjectProxy27CallMethodWithErrorCallbackEPNS2_10MethodCallEiNS_12OnceCallbackIFvPNS2_8ResponseEEEENS6_IFvPNS2_13ErrorResponseEEEEE3$_0vE6InvokeISF_JSA_SE_S8_SC_EEEvOT_DpOT0_
#44 0x7f5cca26d83d _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIZN4dbus11ObjectProxy27CallMethodWithErrorCallbackEPNS4_10MethodCallEiNS_12OnceCallbackIFvPNS4_8ResponseEEEENS8_IFvPNS4_13ErrorResponseEEEEE3$_0JSC_SG_SA_SE_EEEvOT_DpOT0_
#45 0x7f5cca26d7d0 _ZN4base8internal7InvokerINS0_9BindStateIZN4dbus11ObjectProxy27CallMethodWithErrorCallbackEPNS3_10MethodCallEiNS_12OnceCallbackIFvPNS3_8ResponseEEEENS7_IFvPNS3_13ErrorResponseEEEEE3$_0JSB_SF_EEEFvS9_SD_EE7RunImplISG_NSt3__15tupleIJSB_SF_EEEJLm0ELm1EEEEvOT_OT0_NSL_16integer_sequenceImJXspT1_EEEEOS9_OSD_
#46 0x7f5cca26d696 _ZN4base8internal7InvokerINS0_9BindStateIZN4dbus11ObjectProxy27CallMethodWithErrorCallbackEPNS3_10MethodCallEiNS_12OnceCallbackIFvPNS3_8ResponseEEEENS7_IFvPNS3_13ErrorResponseEEEEE3$_0JSB_SF_EEEFvS9_SD_EE7RunOnceEPNS0_13BindStateBaseES9_SD_
#47 0x7f5cca26ea82 _ZNO4base12OnceCallbackIFvPN4dbus8ResponseEPNS1_13ErrorResponseEEE3RunES3_S5_
#48 0x7f5cca265d36 dbus::ObjectProxy::RunResponseOrErrorCallback()
#49 0x7f5cca2753ea _ZN4base8internal13FunctorTraitsIMN4dbus11ObjectProxyEFvNS3_19ReplyCallbackHolderENS_9TimeTicksEPNS2_8ResponseEPNS2_13ErrorResponseEEvE6InvokeISB_13scoped_refptrIS3_EJS4_S5_S7_S9_EEEvT_OT0_DpOT1_
#50 0x7f5cca2752b1 _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIMN4dbus11ObjectProxyEFvNS5_19ReplyCallbackHolderENS_9TimeTicksEPNS4_8ResponseEPNS4_13ErrorResponseEEJ13scoped_refptrIS5_ES6_S7_S9_SB_EEEvOT_DpOT0_
#51 0x7f5cca2751fd _ZN4base8internal7InvokerINS0_9BindStateIMN4dbus11ObjectProxyEFvNS4_19ReplyCallbackHolderENS_9TimeTicksEPNS3_8ResponseEPNS3_13ErrorResponseEEJ13scoped_refptrIS4_ES5_S6_S8_SA_EEEFvvEE7RunImplISC_NSt3__15tupleIJSE_S5_S6_S8_SA_EEEJLm0ELm1ELm2ELm3ELm4EEEEvOT_OT0_NSJ_16integer_sequenceImJXspT1_EEEE
#52 0x7f5cca274fe9 _ZN4base8internal7InvokerINS0_9BindStateIMN4dbus11ObjectProxyEFvNS4_19ReplyCallbackHolderENS_9TimeTicksEPNS3_8ResponseEPNS3_13ErrorResponseEEJ13scoped_refptrIS4_ES5_S6_S8_SA_EEEFvvEE7RunOnceEPNS0_13BindStateBaseE
#53 0x7f5cdd85dbbc _ZNO4base12OnceCallbackIFvvEE3RunEv
#54 0x7f5cddb0f421 base::(anonymous namespace)::PostTaskAndReplyRelay::RunTaskAndPostReply()
#55 0x7f5cddb10033 _ZN4base8internal13FunctorTraitsIPFvNS_12_GLOBAL__N_121PostTaskAndReplyRelayEEvE6InvokeIS5_JS3_EEEvOT_DpOT0_
#56 0x7f5cddb0ff9d _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIPFvNS_12_GLOBAL__N_121PostTaskAndReplyRelayEEJS5_EEEvOT_DpOT0_
#57 0x7f5cddb0ff60 _ZN4base8internal7InvokerINS0_9BindStateIPFvNS_12_GLOBAL__N_121PostTaskAndReplyRelayEEJS4_EEEFvvEE7RunImplIS6_NSt3__15tupleIJS4_EEEJLm0EEEEvOT_OT0_NSB_16integer_sequenceImJXspT1_EEEE
#58 0x7f5cddb0fea9 _ZN4base8internal7InvokerINS0_9BindStateIPFvNS_12_GLOBAL__N_121PostTaskAndReplyRelayEEJS4_EEEFvvEE7RunOnceEPNS0_13BindStateBaseE
#59 0x7f5cdd85dbbc _ZNO4base12OnceCallbackIFvvEE3RunEv
#60 0x7f5cdd8b4358 base::debug::TaskAnnotator::RunTask()
#61 0x7f5cdd950816 base::MessageLoopImpl::RunTask()
#62 0x7f5cdd950bbe base::MessageLoopImpl::DeferOrRunPendingTask()
#63 0x7f5cdd951389 base::MessageLoopImpl::DoWork()
#64 0x7f5cddc40315 base::MessagePumpLibevent::Run()
#65 0x7f5cdd94ff0b base::MessageLoopImpl::Run()
#66 0x7f5cdda03a7d base::RunLoop::Run()
#67 0x5c592b4989b3 ChromeBrowserMainParts::MainMessageLoopRun()
#68 0x7f5cd70f4691 content::BrowserMainLoop::RunMainMessageLoopParts()
#69 0x7f5cd70fdaa0 content::BrowserMainRunnerImpl::Run()
#70 0x7f5cd70e702b content::BrowserMain()
#71 0x7f5cd96f1877 content::RunBrowserProcessMain()
#72 0x7f5cd96f4f33 content::ContentMainRunnerImpl::RunServiceManager()
#73 0x7f5cd96f3aaf content::ContentMainRunnerImpl::Run()
#74 0x7f5cd96e8d1c content::ContentServiceManagerMainDelegate::RunEmbedderProcess()
#75 0x7f5ca8faff5a service_manager::Main()
#76 0x7f5cd96ef213 content::ContentMain()
#77 0x5c5927213858 ChromeMain
#78 0x5c5927213742 main
#79 0x7f5cab0c5736 __libc_start_main
#80 0x5c59272135e9 _start