1 files changed, 1115 insertions, 0 deletions

diff --git a/ipc/glue/BackgroundUtils.cpp b/ipc/glue/BackgroundUtils.cpp
new file mode 100644
index 0000000000..f3071bb627
--- /dev/null
+++ b/ipc/glue/BackgroundUtils.cpp
@@ -0,0 +1,1115 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "BackgroundUtils.h"
+
+#include "MainThreadUtils.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/ContentPrincipal.h"
+#include "mozilla/NullPrincipal.h"
+#include "mozilla/SystemPrincipal.h"
+#include "mozilla/ipc/PBackgroundSharedTypes.h"
+#include "mozilla/ipc/URIUtils.h"
+#include "mozilla/net/CookieJarSettings.h"
+#include "mozilla/net/InterceptionInfo.h"
+#include "mozilla/net/NeckoChannelParams.h"
+#include "ExpandedPrincipal.h"
+#include "nsIScriptSecurityManager.h"
+#include "nsIURI.h"
+#include "nsNetUtil.h"
+#include "mozilla/LoadInfo.h"
+#include "nsContentUtils.h"
+#include "nsString.h"
+#include "nsTArray.h"
+#include "mozilla/nsRedirectHistoryEntry.h"
+#include "mozilla/dom/nsCSPUtils.h"
+#include "mozilla/dom/nsCSPContext.h"
+#include "mozilla/dom/BrowsingContext.h"
+#include "mozilla/dom/CanonicalBrowsingContext.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/WindowGlobalParent.h"
+#include "mozilla/LoadInfo.h"
+
+using namespace mozilla::dom;
+using namespace mozilla::net;
+
+namespace mozilla {
+
+namespace ipc {
+
+Result<nsCOMPtr<nsIPrincipal>, nsresult> PrincipalInfoToPrincipal(
+    const PrincipalInfo& aPrincipalInfo) {
+  MOZ_ASSERT(aPrincipalInfo.type() != PrincipalInfo::T__None);
+
+  nsCOMPtr<nsIPrincipal> principal;
+  nsresult rv;
+
+  switch (aPrincipalInfo.type()) {
+    case PrincipalInfo::TSystemPrincipalInfo: {
+      principal = SystemPrincipal::Get();
+      if (NS_WARN_IF(!principal)) {
+        return Err(NS_ERROR_NOT_INITIALIZED);
+      }
+
+      return principal;
+    }
+
+    case PrincipalInfo::TNullPrincipalInfo: {
+      const NullPrincipalInfo& info = aPrincipalInfo.get_NullPrincipalInfo();
+
+      nsCOMPtr<nsIURI> uri;
+      rv = NS_NewURI(getter_AddRefs(uri), info.spec());
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        return Err(rv);
+      }
+
+      if (!uri->SchemeIs(NS_NULLPRINCIPAL_SCHEME)) {
+        return Err(NS_ERROR_ILLEGAL_VALUE);
+      }
+
+      principal = NullPrincipal::Create(info.attrs(), uri);
+      return principal;
+    }
+
+    case PrincipalInfo::TContentPrincipalInfo: {
+      const ContentPrincipalInfo& info =
+          aPrincipalInfo.get_ContentPrincipalInfo();
+
+      nsCOMPtr<nsIURI> uri;
+      rv = NS_NewURI(getter_AddRefs(uri), info.spec());
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        return Err(rv);
+      }
+
+      nsCOMPtr<nsIURI> domain;
+      if (info.domain()) {
+        rv = NS_NewURI(getter_AddRefs(domain), *info.domain());
+        if (NS_WARN_IF(NS_FAILED(rv))) {
+          return Err(rv);
+        }
+      }
+
+      principal =
+          BasePrincipal::CreateContentPrincipal(uri, info.attrs(), domain);
+      if (NS_WARN_IF(!principal)) {
+        return Err(NS_ERROR_NULL_POINTER);
+      }
+
+      // Origin must match what the_new_principal.getOrigin returns.
+      nsAutoCString originNoSuffix;
+      rv = principal->GetOriginNoSuffix(originNoSuffix);
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        return Err(rv);
+      }
+
+      if (NS_WARN_IF(!info.originNoSuffix().Equals(originNoSuffix))) {
+        return Err(NS_ERROR_FAILURE);
+      }
+
+      if (!info.baseDomain().IsVoid()) {
+        nsAutoCString baseDomain;
+        rv = principal->GetBaseDomain(baseDomain);
+        if (NS_WARN_IF(NS_FAILED(rv))) {
+          return Err(rv);
+        }
+
+        if (NS_WARN_IF(!info.baseDomain().Equals(baseDomain))) {
+          return Err(NS_ERROR_FAILURE);
+        }
+      }
+      return principal;
+    }
+
+    case PrincipalInfo::TExpandedPrincipalInfo: {
+      const ExpandedPrincipalInfo& info =
+          aPrincipalInfo.get_ExpandedPrincipalInfo();
+
+      nsTArray<nsCOMPtr<nsIPrincipal>> allowlist;
+      nsCOMPtr<nsIPrincipal> alPrincipal;
+
+      for (uint32_t i = 0; i < info.allowlist().Length(); i++) {
+        auto principalOrErr = PrincipalInfoToPrincipal(info.allowlist()[i]);
+        if (NS_WARN_IF(principalOrErr.isErr())) {
+          nsresult ret = principalOrErr.unwrapErr();
+          return Err(ret);
+        }
+        // append that principal to the allowlist
+        allowlist.AppendElement(principalOrErr.unwrap());
+      }
+
+      RefPtr<ExpandedPrincipal> expandedPrincipal =
+          ExpandedPrincipal::Create(allowlist, info.attrs());
+      if (!expandedPrincipal) {
+        return Err(NS_ERROR_FAILURE);
+      }
+
+      principal = expandedPrincipal;
+      return principal;
+    }
+
+    default:
+      return Err(NS_ERROR_FAILURE);
+  }
+}
+
+bool StorageKeysEqual(const PrincipalInfo& aLeft, const PrincipalInfo& aRight) {
+  MOZ_RELEASE_ASSERT(aLeft.type() == PrincipalInfo::TContentPrincipalInfo ||
+                     aLeft.type() == PrincipalInfo::TSystemPrincipalInfo);
+  MOZ_RELEASE_ASSERT(aRight.type() == PrincipalInfo::TContentPrincipalInfo ||
+                     aRight.type() == PrincipalInfo::TSystemPrincipalInfo);
+
+  if (aLeft.type() != aRight.type()) {
+    return false;
+  }
+
+  if (aLeft.type() == PrincipalInfo::TContentPrincipalInfo) {
+    const ContentPrincipalInfo& leftContent = aLeft.get_ContentPrincipalInfo();
+    const ContentPrincipalInfo& rightContent =
+        aRight.get_ContentPrincipalInfo();
+
+    return leftContent.attrs() == rightContent.attrs() &&
+           leftContent.originNoSuffix() == rightContent.originNoSuffix();
+  }
+
+  // Storage keys for the System principal always equal.
+  return true;
+}
+
+already_AddRefed<nsIContentSecurityPolicy> CSPInfoToCSP(
+    const CSPInfo& aCSPInfo, Document* aRequestingDoc,
+    nsresult* aOptionalResult) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  nsresult stackResult;
+  nsresult& rv = aOptionalResult ? *aOptionalResult : stackResult;
+
+  RefPtr<nsCSPContext> csp = new nsCSPContext();
+
+  if (aRequestingDoc) {
+    rv = csp->SetRequestContextWithDocument(aRequestingDoc);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return nullptr;
+    }
+  } else {
+    auto principalOrErr =
+        PrincipalInfoToPrincipal(aCSPInfo.requestPrincipalInfo());
+    if (NS_WARN_IF(principalOrErr.isErr())) {
+      return nullptr;
+    }
+
+    nsCOMPtr<nsIURI> selfURI;
+    if (!aCSPInfo.selfURISpec().IsEmpty()) {
+      rv = NS_NewURI(getter_AddRefs(selfURI), aCSPInfo.selfURISpec());
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        return nullptr;
+      }
+    }
+
+    nsCOMPtr<nsIPrincipal> principal = principalOrErr.unwrap();
+
+    rv = csp->SetRequestContextWithPrincipal(
+        principal, selfURI, aCSPInfo.referrer(), aCSPInfo.innerWindowID());
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return nullptr;
+    }
+  }
+  csp->SetSkipAllowInlineStyleCheck(aCSPInfo.skipAllowInlineStyleCheck());
+
+  for (uint32_t i = 0; i < aCSPInfo.policyInfos().Length(); i++) {
+    csp->AddIPCPolicy(aCSPInfo.policyInfos()[i]);
+  }
+  return csp.forget();
+}
+
+nsresult CSPToCSPInfo(nsIContentSecurityPolicy* aCSP, CSPInfo* aCSPInfo) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aCSP);
+  MOZ_ASSERT(aCSPInfo);
+
+  if (!aCSP || !aCSPInfo) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsIPrincipal> requestPrincipal = aCSP->GetRequestPrincipal();
+
+  PrincipalInfo requestingPrincipalInfo;
+  nsresult rv =
+      PrincipalToPrincipalInfo(requestPrincipal, &requestingPrincipalInfo);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  nsCOMPtr<nsIURI> selfURI = aCSP->GetSelfURI();
+  nsAutoCString selfURISpec;
+  if (selfURI) {
+    selfURI->GetSpec(selfURISpec);
+  }
+
+  nsAutoString referrer;
+  aCSP->GetReferrer(referrer);
+
+  uint64_t windowID = aCSP->GetInnerWindowID();
+  bool skipAllowInlineStyleCheck = aCSP->GetSkipAllowInlineStyleCheck();
+
+  nsTArray<ContentSecurityPolicy> policies;
+  static_cast<nsCSPContext*>(aCSP)->SerializePolicies(policies);
+
+  *aCSPInfo = CSPInfo(std::move(policies), requestingPrincipalInfo, selfURISpec,
+                      referrer, windowID, skipAllowInlineStyleCheck);
+  return NS_OK;
+}
+
+nsresult PrincipalToPrincipalInfo(nsIPrincipal* aPrincipal,
+                                  PrincipalInfo* aPrincipalInfo,
+                                  bool aSkipBaseDomain) {
+  MOZ_ASSERT(aPrincipal);
+  MOZ_ASSERT(aPrincipalInfo);
+
+  nsresult rv;
+  if (aPrincipal->GetIsNullPrincipal()) {
+    nsAutoCString spec;
+    rv = aPrincipal->GetAsciiSpec(spec);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return rv;
+    }
+
+    *aPrincipalInfo =
+        NullPrincipalInfo(aPrincipal->OriginAttributesRef(), spec);
+    return NS_OK;
+  }
+
+  if (aPrincipal->IsSystemPrincipal()) {
+    *aPrincipalInfo = SystemPrincipalInfo();
+    return NS_OK;
+  }
+
+  // might be an expanded principal
+  auto* basePrin = BasePrincipal::Cast(aPrincipal);
+  if (basePrin->Is<ExpandedPrincipal>()) {
+    auto* expanded = basePrin->As<ExpandedPrincipal>();
+
+    nsTArray<PrincipalInfo> allowlistInfo;
+    PrincipalInfo info;
+
+    for (auto& prin : expanded->AllowList()) {
+      rv = PrincipalToPrincipalInfo(prin, &info, aSkipBaseDomain);
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        return rv;
+      }
+      // append that spec to the allowlist
+      allowlistInfo.AppendElement(info);
+    }
+
+    *aPrincipalInfo = ExpandedPrincipalInfo(aPrincipal->OriginAttributesRef(),
+                                            std::move(allowlistInfo));
+    return NS_OK;
+  }
+
+  nsAutoCString spec;
+  rv = aPrincipal->GetAsciiSpec(spec);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  nsCString originNoSuffix;
+  rv = aPrincipal->GetOriginNoSuffix(originNoSuffix);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  nsCOMPtr<nsIURI> domainUri;
+  rv = aPrincipal->GetDomain(getter_AddRefs(domainUri));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  Maybe<nsCString> domain;
+  if (domainUri) {
+    domain.emplace();
+    rv = domainUri->GetSpec(domain.ref());
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return rv;
+    }
+  }
+
+  // This attribute is not crucial.
+  nsCString baseDomain;
+  if (aSkipBaseDomain) {
+    baseDomain.SetIsVoid(true);
+  } else {
+    if (NS_FAILED(aPrincipal->GetBaseDomain(baseDomain))) {
+      // No warning here. Some principal URLs do not have a base-domain.
+      baseDomain.SetIsVoid(true);
+    }
+  }
+
+  *aPrincipalInfo =
+      ContentPrincipalInfo(aPrincipal->OriginAttributesRef(), originNoSuffix,
+                           spec, domain, baseDomain);
+  return NS_OK;
+}
+
+bool IsPrincipalInfoPrivate(const PrincipalInfo& aPrincipalInfo) {
+  if (aPrincipalInfo.type() != ipc::PrincipalInfo::TContentPrincipalInfo) {
+    return false;
+  }
+
+  const ContentPrincipalInfo& info = aPrincipalInfo.get_ContentPrincipalInfo();
+  return !!info.attrs().mPrivateBrowsingId;
+}
+
+already_AddRefed<nsIRedirectHistoryEntry> RHEntryInfoToRHEntry(
+    const RedirectHistoryEntryInfo& aRHEntryInfo) {
+  auto principalOrErr = PrincipalInfoToPrincipal(aRHEntryInfo.principalInfo());
+  if (NS_WARN_IF(principalOrErr.isErr())) {
+    return nullptr;
+  }
+
+  nsCOMPtr<nsIPrincipal> principal = principalOrErr.unwrap();
+  nsCOMPtr<nsIURI> referrerUri = DeserializeURI(aRHEntryInfo.referrerUri());
+
+  nsCOMPtr<nsIRedirectHistoryEntry> entry = new nsRedirectHistoryEntry(
+      principal, referrerUri, aRHEntryInfo.remoteAddress());
+
+  return entry.forget();
+}
+
+nsresult RHEntryToRHEntryInfo(nsIRedirectHistoryEntry* aRHEntry,
+                              RedirectHistoryEntryInfo* aRHEntryInfo) {
+  MOZ_ASSERT(aRHEntry);
+  MOZ_ASSERT(aRHEntryInfo);
+
+  nsresult rv;
+  aRHEntry->GetRemoteAddress(aRHEntryInfo->remoteAddress());
+
+  nsCOMPtr<nsIURI> referrerUri;
+  rv = aRHEntry->GetReferrerURI(getter_AddRefs(referrerUri));
+  NS_ENSURE_SUCCESS(rv, rv);
+  SerializeURI(referrerUri, aRHEntryInfo->referrerUri());
+
+  nsCOMPtr<nsIPrincipal> principal;
+  rv = aRHEntry->GetPrincipal(getter_AddRefs(principal));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return PrincipalToPrincipalInfo(principal, &aRHEntryInfo->principalInfo());
+}
+
+nsresult LoadInfoToLoadInfoArgs(nsILoadInfo* aLoadInfo,
+                                Maybe<LoadInfoArgs>* aOptionalLoadInfoArgs) {
+  nsresult rv = NS_OK;
+  Maybe<PrincipalInfo> loadingPrincipalInfo;
+  if (nsIPrincipal* loadingPrin = aLoadInfo->GetLoadingPrincipal()) {
+    loadingPrincipalInfo.emplace();
+    rv = PrincipalToPrincipalInfo(loadingPrin, loadingPrincipalInfo.ptr());
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  PrincipalInfo triggeringPrincipalInfo;
+  rv = PrincipalToPrincipalInfo(aLoadInfo->TriggeringPrincipal(),
+                                &triggeringPrincipalInfo);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  Maybe<PrincipalInfo> principalToInheritInfo;
+  if (nsIPrincipal* principalToInherit = aLoadInfo->PrincipalToInherit()) {
+    principalToInheritInfo.emplace();
+    rv = PrincipalToPrincipalInfo(principalToInherit,
+                                  principalToInheritInfo.ptr());
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  Maybe<PrincipalInfo> topLevelPrincipalInfo;
+  if (nsIPrincipal* topLevenPrin = aLoadInfo->GetTopLevelPrincipal()) {
+    topLevelPrincipalInfo.emplace();
+    rv = PrincipalToPrincipalInfo(topLevenPrin, topLevelPrincipalInfo.ptr());
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  Maybe<URIParams> optionalResultPrincipalURI;
+  nsCOMPtr<nsIURI> resultPrincipalURI;
+  Unused << aLoadInfo->GetResultPrincipalURI(
+      getter_AddRefs(resultPrincipalURI));
+  if (resultPrincipalURI) {
+    SerializeURI(resultPrincipalURI, optionalResultPrincipalURI);
+  }
+
+  nsCString triggeringRemoteType;
+  rv = aLoadInfo->GetTriggeringRemoteType(triggeringRemoteType);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsTArray<RedirectHistoryEntryInfo> redirectChainIncludingInternalRedirects;
+  for (const nsCOMPtr<nsIRedirectHistoryEntry>& redirectEntry :
+       aLoadInfo->RedirectChainIncludingInternalRedirects()) {
+    RedirectHistoryEntryInfo* entry =
+        redirectChainIncludingInternalRedirects.AppendElement();
+    rv = RHEntryToRHEntryInfo(redirectEntry, entry);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  nsTArray<RedirectHistoryEntryInfo> redirectChain;
+  for (const nsCOMPtr<nsIRedirectHistoryEntry>& redirectEntry :
+       aLoadInfo->RedirectChain()) {
+    RedirectHistoryEntryInfo* entry = redirectChain.AppendElement();
+    rv = RHEntryToRHEntryInfo(redirectEntry, entry);
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  Maybe<IPCClientInfo> ipcClientInfo;
+  const Maybe<ClientInfo>& clientInfo = aLoadInfo->GetClientInfo();
+  if (clientInfo.isSome()) {
+    ipcClientInfo.emplace(clientInfo.ref().ToIPC());
+  }
+
+  Maybe<IPCClientInfo> ipcReservedClientInfo;
+  const Maybe<ClientInfo>& reservedClientInfo =
+      aLoadInfo->GetReservedClientInfo();
+  if (reservedClientInfo.isSome()) {
+    ipcReservedClientInfo.emplace(reservedClientInfo.ref().ToIPC());
+  }
+
+  Maybe<IPCClientInfo> ipcInitialClientInfo;
+  const Maybe<ClientInfo>& initialClientInfo =
+      aLoadInfo->GetInitialClientInfo();
+  if (initialClientInfo.isSome()) {
+    ipcInitialClientInfo.emplace(initialClientInfo.ref().ToIPC());
+  }
+
+  Maybe<IPCServiceWorkerDescriptor> ipcController;
+  const Maybe<ServiceWorkerDescriptor>& controller = aLoadInfo->GetController();
+  if (controller.isSome()) {
+    ipcController.emplace(controller.ref().ToIPC());
+  }
+
+  nsAutoString cspNonce;
+  Unused << NS_WARN_IF(NS_FAILED(aLoadInfo->GetCspNonce(cspNonce)));
+
+  nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
+  rv = aLoadInfo->GetCookieJarSettings(getter_AddRefs(cookieJarSettings));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  CookieJarSettingsArgs cookieJarSettingsArgs;
+  static_cast<CookieJarSettings*>(cookieJarSettings.get())
+      ->Serialize(cookieJarSettingsArgs);
+
+  Maybe<CSPInfo> maybeCspToInheritInfo;
+  nsCOMPtr<nsIContentSecurityPolicy> cspToInherit =
+      aLoadInfo->GetCspToInherit();
+  if (cspToInherit) {
+    CSPInfo cspToInheritInfo;
+    Unused << NS_WARN_IF(
+        NS_FAILED(CSPToCSPInfo(cspToInherit, &cspToInheritInfo)));
+    maybeCspToInheritInfo.emplace(cspToInheritInfo);
+  }
+
+  nsCOMPtr<nsIURI> unstrippedURI;
+  Unused << aLoadInfo->GetUnstrippedURI(getter_AddRefs(unstrippedURI));
+
+  Maybe<bool> isThirdPartyContextToTopWindow;
+  if (static_cast<LoadInfo*>(aLoadInfo)
+          ->HasIsThirdPartyContextToTopWindowSet()) {
+    isThirdPartyContextToTopWindow.emplace(
+        aLoadInfo->GetIsThirdPartyContextToTopWindow());
+  }
+
+  Maybe<InterceptionInfoArg> interceptionInfoArg;
+  nsIInterceptionInfo* interceptionInfo = aLoadInfo->InterceptionInfo();
+  if (interceptionInfo) {
+    Maybe<PrincipalInfo> triggeringPrincipalInfo;
+    if (interceptionInfo->TriggeringPrincipal()) {
+      triggeringPrincipalInfo.emplace();
+      rv = PrincipalToPrincipalInfo(interceptionInfo->TriggeringPrincipal(),
+                                    triggeringPrincipalInfo.ptr());
+    }
+
+    nsTArray<RedirectHistoryEntryInfo> redirectChain;
+    for (const nsCOMPtr<nsIRedirectHistoryEntry>& redirectEntry :
+         interceptionInfo->RedirectChain()) {
+      RedirectHistoryEntryInfo* entry = redirectChain.AppendElement();
+      rv = RHEntryToRHEntryInfo(redirectEntry, entry);
+      NS_ENSURE_SUCCESS(rv, rv);
+    }
+
+    interceptionInfoArg = Some(InterceptionInfoArg(
+        triggeringPrincipalInfo, interceptionInfo->ContentPolicyType(),
+        redirectChain, interceptionInfo->FromThirdParty()));
+  }
+
+  *aOptionalLoadInfoArgs = Some(LoadInfoArgs(
+      loadingPrincipalInfo, triggeringPrincipalInfo, principalToInheritInfo,
+      topLevelPrincipalInfo, optionalResultPrincipalURI, triggeringRemoteType,
+      aLoadInfo->GetSandboxedNullPrincipalID(), aLoadInfo->GetSecurityFlags(),
+      aLoadInfo->GetSandboxFlags(), aLoadInfo->GetTriggeringSandboxFlags(),
+      aLoadInfo->InternalContentPolicyType(),
+      static_cast<uint32_t>(aLoadInfo->GetTainting()),
+      aLoadInfo->GetBlockAllMixedContent(),
+      aLoadInfo->GetUpgradeInsecureRequests(),
+      aLoadInfo->GetBrowserUpgradeInsecureRequests(),
+      aLoadInfo->GetBrowserDidUpgradeInsecureRequests(),
+      aLoadInfo->GetBrowserWouldUpgradeInsecureRequests(),
+      aLoadInfo->GetForceAllowDataURI(),
+      aLoadInfo->GetAllowInsecureRedirectToDataURI(),
+      aLoadInfo->GetSkipContentPolicyCheckForWebRequest(),
+      aLoadInfo->GetOriginalFrameSrcLoad(),
+      aLoadInfo->GetForceInheritPrincipalDropped(),
+      aLoadInfo->GetInnerWindowID(), aLoadInfo->GetBrowsingContextID(),
+      aLoadInfo->GetFrameBrowsingContextID(),
+      aLoadInfo->GetInitialSecurityCheckDone(),
+      aLoadInfo->GetIsInThirdPartyContext(), isThirdPartyContextToTopWindow,
+      aLoadInfo->GetIsFormSubmission(), aLoadInfo->GetSendCSPViolationEvents(),
+      aLoadInfo->GetOriginAttributes(), redirectChainIncludingInternalRedirects,
+      redirectChain, aLoadInfo->GetHasInjectedCookieForCookieBannerHandling(),
+      ipcClientInfo, ipcReservedClientInfo, ipcInitialClientInfo, ipcController,
+      aLoadInfo->CorsUnsafeHeaders(), aLoadInfo->GetForcePreflight(),
+      aLoadInfo->GetIsPreflight(), aLoadInfo->GetLoadTriggeredFromExternal(),
+      aLoadInfo->GetServiceWorkerTaintingSynthesized(),
+      aLoadInfo->GetDocumentHasUserInteracted(),
+      aLoadInfo->GetAllowListFutureDocumentsCreatedFromThisRedirectChain(),
+      aLoadInfo->GetNeedForCheckingAntiTrackingHeuristic(), cspNonce,
+      aLoadInfo->GetSkipContentSniffing(), aLoadInfo->GetHttpsOnlyStatus(),
+      aLoadInfo->GetHstsStatus(), aLoadInfo->GetHasValidUserGestureActivation(),
+      aLoadInfo->GetAllowDeprecatedSystemRequests(),
+      aLoadInfo->GetIsInDevToolsContext(), aLoadInfo->GetParserCreatedScript(),
+      aLoadInfo->GetIsFromProcessingFrameAttributes(),
+      aLoadInfo->GetIsMediaRequest(), aLoadInfo->GetIsMediaInitialRequest(),
+      aLoadInfo->GetIsFromObjectOrEmbed(), cookieJarSettingsArgs,
+      aLoadInfo->GetRequestBlockingReason(), maybeCspToInheritInfo,
+      aLoadInfo->GetStoragePermission(), aLoadInfo->GetIsMetaRefresh(),
+      aLoadInfo->GetLoadingEmbedderPolicy(),
+      aLoadInfo->GetIsOriginTrialCoepCredentiallessEnabledForTopLevel(),
+      unstrippedURI, interceptionInfoArg));
+
+  return NS_OK;
+}
+
+nsresult LoadInfoArgsToLoadInfo(
+    const Maybe<LoadInfoArgs>& aOptionalLoadInfoArgs,
+    const nsACString& aOriginRemoteType, nsILoadInfo** outLoadInfo) {
+  return LoadInfoArgsToLoadInfo(aOptionalLoadInfoArgs, aOriginRemoteType,
+                                nullptr, outLoadInfo);
+}
+nsresult LoadInfoArgsToLoadInfo(
+    const Maybe<LoadInfoArgs>& aOptionalLoadInfoArgs,
+    const nsACString& aOriginRemoteType, nsINode* aCspToInheritLoadingContext,
+    nsILoadInfo** outLoadInfo) {
+  RefPtr<LoadInfo> loadInfo;
+  nsresult rv = LoadInfoArgsToLoadInfo(aOptionalLoadInfoArgs, aOriginRemoteType,
+                                       aCspToInheritLoadingContext,
+                                       getter_AddRefs(loadInfo));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  loadInfo.forget(outLoadInfo);
+  return NS_OK;
+}
+
+nsresult LoadInfoArgsToLoadInfo(
+    const Maybe<LoadInfoArgs>& aOptionalLoadInfoArgs,
+    const nsACString& aOriginRemoteType, LoadInfo** outLoadInfo) {
+  return LoadInfoArgsToLoadInfo(aOptionalLoadInfoArgs, aOriginRemoteType,
+                                nullptr, outLoadInfo);
+}
+nsresult LoadInfoArgsToLoadInfo(
+    const Maybe<LoadInfoArgs>& aOptionalLoadInfoArgs,
+    const nsACString& aOriginRemoteType, nsINode* aCspToInheritLoadingContext,
+    LoadInfo** outLoadInfo) {
+  if (aOptionalLoadInfoArgs.isNothing()) {
+    *outLoadInfo = nullptr;
+    return NS_OK;
+  }
+
+  const LoadInfoArgs& loadInfoArgs = aOptionalLoadInfoArgs.ref();
+
+  nsCOMPtr<nsIPrincipal> loadingPrincipal;
+  if (loadInfoArgs.requestingPrincipalInfo().isSome()) {
+    auto loadingPrincipalOrErr =
+        PrincipalInfoToPrincipal(loadInfoArgs.requestingPrincipalInfo().ref());
+    if (NS_WARN_IF(loadingPrincipalOrErr.isErr())) {
+      return loadingPrincipalOrErr.unwrapErr();
+    }
+    loadingPrincipal = loadingPrincipalOrErr.unwrap();
+  }
+
+  auto triggeringPrincipalOrErr =
+      PrincipalInfoToPrincipal(loadInfoArgs.triggeringPrincipalInfo());
+  if (NS_WARN_IF(triggeringPrincipalOrErr.isErr())) {
+    return triggeringPrincipalOrErr.unwrapErr();
+  }
+  nsCOMPtr<nsIPrincipal> triggeringPrincipal =
+      triggeringPrincipalOrErr.unwrap();
+
+  nsCOMPtr<nsIPrincipal> principalToInherit;
+  nsCOMPtr<nsIPrincipal> flattenedPrincipalToInherit;
+  if (loadInfoArgs.principalToInheritInfo().isSome()) {
+    auto principalToInheritOrErr =
+        PrincipalInfoToPrincipal(loadInfoArgs.principalToInheritInfo().ref());
+    if (NS_WARN_IF(principalToInheritOrErr.isErr())) {
+      return principalToInheritOrErr.unwrapErr();
+    }
+    flattenedPrincipalToInherit = principalToInheritOrErr.unwrap();
+  }
+
+  if (XRE_IsContentProcess()) {
+    auto targetBrowsingContextId = loadInfoArgs.frameBrowsingContextID()
+                                       ? loadInfoArgs.frameBrowsingContextID()
+                                       : loadInfoArgs.browsingContextID();
+    if (RefPtr<BrowsingContext> bc =
+            BrowsingContext::Get(targetBrowsingContextId)) {
+      auto [originalTriggeringPrincipal, originalPrincipalToInherit] =
+          bc->GetTriggeringAndInheritPrincipalsForCurrentLoad();
+
+      if (originalTriggeringPrincipal &&
+          originalTriggeringPrincipal->Equals(triggeringPrincipal)) {
+        triggeringPrincipal = originalTriggeringPrincipal;
+      }
+      if (originalPrincipalToInherit &&
+          (loadInfoArgs.securityFlags() &
+           nsILoadInfo::SEC_FORCE_INHERIT_PRINCIPAL) &&
+          originalPrincipalToInherit->Equals(flattenedPrincipalToInherit)) {
+        principalToInherit = originalPrincipalToInherit;
+      }
+    }
+  }
+  if (!principalToInherit && loadInfoArgs.principalToInheritInfo().isSome()) {
+    principalToInherit = flattenedPrincipalToInherit;
+  }
+
+  nsCOMPtr<nsIPrincipal> topLevelPrincipal;
+  if (loadInfoArgs.topLevelPrincipalInfo().isSome()) {
+    auto topLevelPrincipalOrErr =
+        PrincipalInfoToPrincipal(loadInfoArgs.topLevelPrincipalInfo().ref());
+    if (NS_WARN_IF(topLevelPrincipalOrErr.isErr())) {
+      return topLevelPrincipalOrErr.unwrapErr();
+    }
+    topLevelPrincipal = topLevelPrincipalOrErr.unwrap();
+  }
+
+  nsCOMPtr<nsIURI> resultPrincipalURI;
+  if (loadInfoArgs.resultPrincipalURI().isSome()) {
+    resultPrincipalURI = DeserializeURI(loadInfoArgs.resultPrincipalURI());
+    NS_ENSURE_TRUE(resultPrincipalURI, NS_ERROR_UNEXPECTED);
+  }
+
+  // If we received this message from a content process, reset
+  // triggeringRemoteType to the process which sent us the message. If the
+  // parent sent us the message, we trust it to provide the correct triggering
+  // remote type.
+  //
+  // This means that the triggering remote type will be reset if a LoadInfo is
+  // bounced through a content process, as the LoadInfo can no longer be
+  // validated to be coming from the originally specified remote type.
+  nsCString triggeringRemoteType = loadInfoArgs.triggeringRemoteType();
+  if (aOriginRemoteType != NOT_REMOTE_TYPE &&
+      aOriginRemoteType != triggeringRemoteType) {
+    triggeringRemoteType = aOriginRemoteType;
+  }
+
+  RedirectHistoryArray redirectChainIncludingInternalRedirects;
+  for (const RedirectHistoryEntryInfo& entryInfo :
+       loadInfoArgs.redirectChainIncludingInternalRedirects()) {
+    nsCOMPtr<nsIRedirectHistoryEntry> redirectHistoryEntry =
+        RHEntryInfoToRHEntry(entryInfo);
+    NS_ENSURE_TRUE(redirectHistoryEntry, NS_ERROR_UNEXPECTED);
+    redirectChainIncludingInternalRedirects.AppendElement(
+        redirectHistoryEntry.forget());
+  }
+
+  RedirectHistoryArray redirectChain;
+  for (const RedirectHistoryEntryInfo& entryInfo :
+       loadInfoArgs.redirectChain()) {
+    nsCOMPtr<nsIRedirectHistoryEntry> redirectHistoryEntry =
+        RHEntryInfoToRHEntry(entryInfo);
+    NS_ENSURE_TRUE(redirectHistoryEntry, NS_ERROR_UNEXPECTED);
+    redirectChain.AppendElement(redirectHistoryEntry.forget());
+  }
+  nsTArray<nsCOMPtr<nsIPrincipal>> ancestorPrincipals;
+  nsTArray<uint64_t> ancestorBrowsingContextIDs;
+  if (XRE_IsParentProcess() &&
+      (nsContentUtils::InternalContentPolicyTypeToExternal(
+           loadInfoArgs.contentPolicyType()) !=
+       ExtContentPolicy::TYPE_DOCUMENT)) {
+    // Only fill out ancestor principals and browsing context IDs when we
+    // are deserializing LoadInfoArgs to be LoadInfo for a subresource
+    RefPtr<BrowsingContext> parentBC =
+        BrowsingContext::Get(loadInfoArgs.browsingContextID());
+    if (parentBC) {
+      LoadInfo::ComputeAncestors(parentBC->Canonical(), ancestorPrincipals,
+                                 ancestorBrowsingContextIDs);
+    }
+  }
+
+  Maybe<ClientInfo> clientInfo;
+  if (loadInfoArgs.clientInfo().isSome()) {
+    clientInfo.emplace(ClientInfo(loadInfoArgs.clientInfo().ref()));
+  }
+
+  Maybe<ClientInfo> reservedClientInfo;
+  if (loadInfoArgs.reservedClientInfo().isSome()) {
+    reservedClientInfo.emplace(
+        ClientInfo(loadInfoArgs.reservedClientInfo().ref()));
+  }
+
+  Maybe<ClientInfo> initialClientInfo;
+  if (loadInfoArgs.initialClientInfo().isSome()) {
+    initialClientInfo.emplace(
+        ClientInfo(loadInfoArgs.initialClientInfo().ref()));
+  }
+
+  // We can have an initial client info or a reserved client info, but not both.
+  MOZ_DIAGNOSTIC_ASSERT(reservedClientInfo.isNothing() ||
+                        initialClientInfo.isNothing());
+  NS_ENSURE_TRUE(
+      reservedClientInfo.isNothing() || initialClientInfo.isNothing(),
+      NS_ERROR_UNEXPECTED);
+
+  Maybe<ServiceWorkerDescriptor> controller;
+  if (loadInfoArgs.controller().isSome()) {
+    controller.emplace(
+        ServiceWorkerDescriptor(loadInfoArgs.controller().ref()));
+  }
+
+  nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
+  CookieJarSettings::Deserialize(loadInfoArgs.cookieJarSettings(),
+                                 getter_AddRefs(cookieJarSettings));
+
+  nsCOMPtr<nsIContentSecurityPolicy> cspToInherit;
+  Maybe<mozilla::ipc::CSPInfo> cspToInheritInfo =
+      loadInfoArgs.cspToInheritInfo();
+  if (cspToInheritInfo.isSome()) {
+    nsCOMPtr<Document> doc = do_QueryInterface(aCspToInheritLoadingContext);
+    cspToInherit = CSPInfoToCSP(cspToInheritInfo.ref(), doc);
+  }
+
+  // Restore the loadingContext for frames using the BrowsingContext's
+  // embedder element. Note that this only works if the embedder is
+  // same-process, so won't be fission compatible.
+  nsCOMPtr<nsINode> loadingContext;
+  RefPtr<BrowsingContext> frameBrowsingContext =
+      BrowsingContext::Get(loadInfoArgs.frameBrowsingContextID());
+  if (frameBrowsingContext) {
+    loadingContext = frameBrowsingContext->GetEmbedderElement();
+  }
+
+  Maybe<bool> isThirdPartyContextToTopWindow;
+  if (loadInfoArgs.isThirdPartyContextToTopWindow().isSome()) {
+    isThirdPartyContextToTopWindow.emplace(
+        loadInfoArgs.isThirdPartyContextToTopWindow().ref());
+  }
+
+  nsCOMPtr<nsIInterceptionInfo> interceptionInfo;
+  if (loadInfoArgs.interceptionInfo().isSome()) {
+    const InterceptionInfoArg& interceptionInfoArg =
+        loadInfoArgs.interceptionInfo().ref();
+    nsCOMPtr<nsIPrincipal> triggeringPrincipal;
+    if (interceptionInfoArg.triggeringPrincipalInfo().isSome()) {
+      auto triggeringPrincipalOrErr = PrincipalInfoToPrincipal(
+          interceptionInfoArg.triggeringPrincipalInfo().ref());
+      if (NS_WARN_IF(triggeringPrincipalOrErr.isErr())) {
+        return triggeringPrincipalOrErr.unwrapErr();
+      }
+      triggeringPrincipal = triggeringPrincipalOrErr.unwrap();
+    }
+
+    RedirectHistoryArray redirectChain;
+    for (const RedirectHistoryEntryInfo& entryInfo :
+         interceptionInfoArg.redirectChain()) {
+      nsCOMPtr<nsIRedirectHistoryEntry> redirectHistoryEntry =
+          RHEntryInfoToRHEntry(entryInfo);
+      NS_ENSURE_TRUE(redirectHistoryEntry, NS_ERROR_UNEXPECTED);
+      redirectChain.AppendElement(redirectHistoryEntry.forget());
+    }
+
+    interceptionInfo = new InterceptionInfo(
+        triggeringPrincipal, interceptionInfoArg.contentPolicyType(),
+        redirectChain, interceptionInfoArg.fromThirdParty());
+  }
+
+  RefPtr<mozilla::net::LoadInfo> loadInfo = new mozilla::net::LoadInfo(
+      loadingPrincipal, triggeringPrincipal, principalToInherit,
+      topLevelPrincipal, resultPrincipalURI, cookieJarSettings, cspToInherit,
+      triggeringRemoteType, loadInfoArgs.sandboxedNullPrincipalID(), clientInfo,
+      reservedClientInfo, initialClientInfo, controller,
+      loadInfoArgs.securityFlags(), loadInfoArgs.sandboxFlags(),
+      loadInfoArgs.triggeringSandboxFlags(), loadInfoArgs.contentPolicyType(),
+      static_cast<LoadTainting>(loadInfoArgs.tainting()),
+      loadInfoArgs.blockAllMixedContent(),
+      loadInfoArgs.upgradeInsecureRequests(),
+      loadInfoArgs.browserUpgradeInsecureRequests(),
+      loadInfoArgs.browserDidUpgradeInsecureRequests(),
+      loadInfoArgs.browserWouldUpgradeInsecureRequests(),
+      loadInfoArgs.forceAllowDataURI(),
+      loadInfoArgs.allowInsecureRedirectToDataURI(),
+      loadInfoArgs.skipContentPolicyCheckForWebRequest(),
+      loadInfoArgs.originalFrameSrcLoad(),
+      loadInfoArgs.forceInheritPrincipalDropped(), loadInfoArgs.innerWindowID(),
+      loadInfoArgs.browsingContextID(), loadInfoArgs.frameBrowsingContextID(),
+      loadInfoArgs.initialSecurityCheckDone(),
+      loadInfoArgs.isInThirdPartyContext(), isThirdPartyContextToTopWindow,
+      loadInfoArgs.isFormSubmission(), loadInfoArgs.sendCSPViolationEvents(),
+      loadInfoArgs.originAttributes(),
+      std::move(redirectChainIncludingInternalRedirects),
+      std::move(redirectChain), std::move(ancestorPrincipals),
+      ancestorBrowsingContextIDs, loadInfoArgs.corsUnsafeHeaders(),
+      loadInfoArgs.forcePreflight(), loadInfoArgs.isPreflight(),
+      loadInfoArgs.loadTriggeredFromExternal(),
+      loadInfoArgs.serviceWorkerTaintingSynthesized(),
+      loadInfoArgs.documentHasUserInteracted(),
+      loadInfoArgs.allowListFutureDocumentsCreatedFromThisRedirectChain(),
+      loadInfoArgs.needForCheckingAntiTrackingHeuristic(),
+      loadInfoArgs.cspNonce(), loadInfoArgs.skipContentSniffing(),
+      loadInfoArgs.httpsOnlyStatus(), loadInfoArgs.hstsStatus(),
+      loadInfoArgs.hasValidUserGestureActivation(),
+      loadInfoArgs.allowDeprecatedSystemRequests(),
+      loadInfoArgs.isInDevToolsContext(), loadInfoArgs.parserCreatedScript(),
+      loadInfoArgs.storagePermission(), loadInfoArgs.isMetaRefresh(),
+      loadInfoArgs.requestBlockingReason(), loadingContext,
+      loadInfoArgs.loadingEmbedderPolicy(),
+      loadInfoArgs.originTrialCoepCredentiallessEnabledForTopLevel(),
+      loadInfoArgs.unstrippedURI(), interceptionInfo,
+      loadInfoArgs.hasInjectedCookieForCookieBannerHandling());
+
+  if (loadInfoArgs.isFromProcessingFrameAttributes()) {
+    loadInfo->SetIsFromProcessingFrameAttributes();
+  }
+
+  if (loadInfoArgs.isMediaRequest()) {
+    loadInfo->SetIsMediaRequest(true);
+
+    if (loadInfoArgs.isMediaInitialRequest()) {
+      loadInfo->SetIsMediaInitialRequest(true);
+    }
+  }
+
+  if (loadInfoArgs.isFromObjectOrEmbed()) {
+    loadInfo->SetIsFromObjectOrEmbed(true);
+  }
+
+  loadInfo.forget(outLoadInfo);
+  return NS_OK;
+}
+
+void LoadInfoToParentLoadInfoForwarder(
+    nsILoadInfo* aLoadInfo, ParentLoadInfoForwarderArgs* aForwarderArgsOut) {
+  Maybe<IPCServiceWorkerDescriptor> ipcController;
+  Maybe<ServiceWorkerDescriptor> controller(aLoadInfo->GetController());
+  if (controller.isSome()) {
+    ipcController.emplace(controller.ref().ToIPC());
+  }
+
+  uint32_t tainting = nsILoadInfo::TAINTING_BASIC;
+  Unused << aLoadInfo->GetTainting(&tainting);
+
+  Maybe<CookieJarSettingsArgs> cookieJarSettingsArgs;
+
+  nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
+  nsresult rv =
+      aLoadInfo->GetCookieJarSettings(getter_AddRefs(cookieJarSettings));
+  CookieJarSettings* cs =
+      static_cast<CookieJarSettings*>(cookieJarSettings.get());
+  if (NS_SUCCEEDED(rv) && cookieJarSettings && cs->HasBeenChanged()) {
+    CookieJarSettingsArgs args;
+    cs->Serialize(args);
+    cookieJarSettingsArgs = Some(args);
+  }
+
+  nsCOMPtr<nsIURI> unstrippedURI;
+  Unused << aLoadInfo->GetUnstrippedURI(getter_AddRefs(unstrippedURI));
+
+  Maybe<bool> isThirdPartyContextToTopWindow;
+  if (static_cast<LoadInfo*>(aLoadInfo)
+          ->HasIsThirdPartyContextToTopWindowSet()) {
+    isThirdPartyContextToTopWindow.emplace(
+        aLoadInfo->GetIsThirdPartyContextToTopWindow());
+  }
+
+  *aForwarderArgsOut = ParentLoadInfoForwarderArgs(
+      aLoadInfo->GetAllowInsecureRedirectToDataURI(), ipcController, tainting,
+      aLoadInfo->GetSkipContentSniffing(), aLoadInfo->GetHttpsOnlyStatus(),
+      aLoadInfo->GetHstsStatus(), aLoadInfo->GetHasValidUserGestureActivation(),
+      aLoadInfo->GetAllowDeprecatedSystemRequests(),
+      aLoadInfo->GetIsInDevToolsContext(), aLoadInfo->GetParserCreatedScript(),
+      aLoadInfo->GetTriggeringSandboxFlags(),
+      aLoadInfo->GetServiceWorkerTaintingSynthesized(),
+      aLoadInfo->GetDocumentHasUserInteracted(),
+      aLoadInfo->GetAllowListFutureDocumentsCreatedFromThisRedirectChain(),
+      cookieJarSettingsArgs, aLoadInfo->GetRequestBlockingReason(),
+      aLoadInfo->GetStoragePermission(), aLoadInfo->GetIsMetaRefresh(),
+      isThirdPartyContextToTopWindow, aLoadInfo->GetIsInThirdPartyContext(),
+      unstrippedURI);
+}
+
+nsresult MergeParentLoadInfoForwarder(
+    ParentLoadInfoForwarderArgs const& aForwarderArgs, nsILoadInfo* aLoadInfo) {
+  nsresult rv;
+
+  rv = aLoadInfo->SetAllowInsecureRedirectToDataURI(
+      aForwarderArgs.allowInsecureRedirectToDataURI());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  aLoadInfo->ClearController();
+  auto& controller = aForwarderArgs.controller();
+  if (controller.isSome()) {
+    aLoadInfo->SetController(ServiceWorkerDescriptor(controller.ref()));
+  }
+
+  if (aForwarderArgs.serviceWorkerTaintingSynthesized()) {
+    aLoadInfo->SynthesizeServiceWorkerTainting(
+        static_cast<LoadTainting>(aForwarderArgs.tainting()));
+  } else {
+    aLoadInfo->MaybeIncreaseTainting(aForwarderArgs.tainting());
+  }
+
+  rv = aLoadInfo->SetSkipContentSniffing(aForwarderArgs.skipContentSniffing());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aLoadInfo->SetHttpsOnlyStatus(aForwarderArgs.httpsOnlyStatus());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aLoadInfo->SetHstsStatus(aForwarderArgs.hstsStatus());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aLoadInfo->SetTriggeringSandboxFlags(
+      aForwarderArgs.triggeringSandboxFlags());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aLoadInfo->SetHasValidUserGestureActivation(
+      aForwarderArgs.hasValidUserGestureActivation());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aLoadInfo->SetAllowDeprecatedSystemRequests(
+      aForwarderArgs.allowDeprecatedSystemRequests());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aLoadInfo->SetIsInDevToolsContext(aForwarderArgs.isInDevToolsContext());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aLoadInfo->SetParserCreatedScript(aForwarderArgs.parserCreatedScript());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  MOZ_ALWAYS_SUCCEEDS(aLoadInfo->SetDocumentHasUserInteracted(
+      aForwarderArgs.documentHasUserInteracted()));
+  MOZ_ALWAYS_SUCCEEDS(
+      aLoadInfo->SetAllowListFutureDocumentsCreatedFromThisRedirectChain(
+          aForwarderArgs
+              .allowListFutureDocumentsCreatedFromThisRedirectChain()));
+  MOZ_ALWAYS_SUCCEEDS(aLoadInfo->SetRequestBlockingReason(
+      aForwarderArgs.requestBlockingReason()));
+
+  const Maybe<CookieJarSettingsArgs>& cookieJarSettingsArgs =
+      aForwarderArgs.cookieJarSettings();
+  if (cookieJarSettingsArgs.isSome()) {
+    nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
+    nsresult rv =
+        aLoadInfo->GetCookieJarSettings(getter_AddRefs(cookieJarSettings));
+    if (NS_SUCCEEDED(rv) && cookieJarSettings) {
+      static_cast<CookieJarSettings*>(cookieJarSettings.get())
+          ->Merge(cookieJarSettingsArgs.ref());
+    }
+  }
+
+  rv = aLoadInfo->SetStoragePermission(aForwarderArgs.storagePermission());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aLoadInfo->SetIsMetaRefresh(aForwarderArgs.isMetaRefresh());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  static_cast<LoadInfo*>(aLoadInfo)->ClearIsThirdPartyContextToTopWindow();
+  if (aForwarderArgs.isThirdPartyContextToTopWindow().isSome()) {
+    rv = aLoadInfo->SetIsThirdPartyContextToTopWindow(
+        aForwarderArgs.isThirdPartyContextToTopWindow().ref());
+  }
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aLoadInfo->SetIsInThirdPartyContext(
+      aForwarderArgs.isInThirdPartyContext());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = aLoadInfo->SetUnstrippedURI(aForwarderArgs.unstrippedURI());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+void LoadInfoToChildLoadInfoForwarder(
+    nsILoadInfo* aLoadInfo, ChildLoadInfoForwarderArgs* aForwarderArgsOut) {
+  Maybe<IPCClientInfo> ipcReserved;
+  Maybe<ClientInfo> reserved(aLoadInfo->GetReservedClientInfo());
+  if (reserved.isSome()) {
+    ipcReserved.emplace(reserved.ref().ToIPC());
+  }
+
+  Maybe<IPCClientInfo> ipcInitial;
+  Maybe<ClientInfo> initial(aLoadInfo->GetInitialClientInfo());
+  if (initial.isSome()) {
+    ipcInitial.emplace(initial.ref().ToIPC());
+  }
+
+  Maybe<IPCServiceWorkerDescriptor> ipcController;
+  Maybe<ServiceWorkerDescriptor> controller(aLoadInfo->GetController());
+  if (controller.isSome()) {
+    ipcController.emplace(controller.ref().ToIPC());
+  }
+
+  *aForwarderArgsOut =
+      ChildLoadInfoForwarderArgs(ipcReserved, ipcInitial, ipcController,
+                                 aLoadInfo->GetRequestBlockingReason());
+}
+
+nsresult MergeChildLoadInfoForwarder(
+    const ChildLoadInfoForwarderArgs& aForwarderArgs, nsILoadInfo* aLoadInfo) {
+  Maybe<ClientInfo> reservedClientInfo;
+  auto& ipcReserved = aForwarderArgs.reservedClientInfo();
+  if (ipcReserved.isSome()) {
+    reservedClientInfo.emplace(ClientInfo(ipcReserved.ref()));
+  }
+
+  Maybe<ClientInfo> initialClientInfo;
+  auto& ipcInitial = aForwarderArgs.initialClientInfo();
+  if (ipcInitial.isSome()) {
+    initialClientInfo.emplace(ClientInfo(ipcInitial.ref()));
+  }
+
+  // There should only be at most one reserved or initial ClientInfo.
+  if (NS_WARN_IF(reservedClientInfo.isSome() && initialClientInfo.isSome())) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // If we received no reserved or initial ClientInfo, then we must not
+  // already have one set.  There are no use cases where this should
+  // happen and we don't have a way to clear the current value.
+  if (NS_WARN_IF(reservedClientInfo.isNothing() &&
+                 initialClientInfo.isNothing() &&
+                 (aLoadInfo->GetReservedClientInfo().isSome() ||
+                  aLoadInfo->GetInitialClientInfo().isSome()))) {
+    return NS_ERROR_FAILURE;
+  }
+
+  if (reservedClientInfo.isSome()) {
+    // We need to override here instead of simply set the value.  This
+    // allows us to change the reserved client.  This is necessary when
+    // the ClientChannelHelper created a new reserved client in the
+    // child-side of the redirect.
+    aLoadInfo->OverrideReservedClientInfoInParent(reservedClientInfo.ref());
+  } else if (initialClientInfo.isSome()) {
+    aLoadInfo->SetInitialClientInfo(initialClientInfo.ref());
+  }
+
+  aLoadInfo->ClearController();
+  auto& controller = aForwarderArgs.controller();
+  if (controller.isSome()) {
+    aLoadInfo->SetController(ServiceWorkerDescriptor(controller.ref()));
+  }
+
+  uint32_t blockingReason = aForwarderArgs.requestBlockingReason();
+  if (blockingReason) {
+    // We only want to override when non-null, so that any earlier set non-null
+    // value is not reverted to 0.
+    aLoadInfo->SetRequestBlockingReason(blockingReason);
+  }
+
+  return NS_OK;
+}
+
+}  // namespace ipc
+}  // namespace mozilla