Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1588 insertions, 0 deletions

diff --git a/docshell/shistory/SessionHistoryEntry.cpp b/docshell/shistory/SessionHistoryEntry.cpp
new file mode 100644
index 0000000000..7989d6fbe6
--- /dev/null
+++ b/docshell/shistory/SessionHistoryEntry.cpp
@@ -0,0 +1,1588 @@
+/* -*- 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 "SessionHistoryEntry.h"
+#include "ipc/IPCMessageUtilsSpecializations.h"
+#include "nsDocShell.h"
+#include "nsDocShellLoadState.h"
+#include "nsIHttpChannel.h"
+#include "nsSHEntryShared.h"
+#include "nsSHistory.h"
+#include "nsStructuredCloneContainer.h"
+#include "nsXULAppAPI.h"
+#include "mozilla/PresState.h"
+#include "mozilla/Tuple.h"
+#include "mozilla/dom/CSPMessageUtils.h"
+#include "mozilla/dom/DOMTypes.h"
+#include "mozilla/dom/nsCSPContext.h"
+#include "mozilla/dom/PermissionMessageUtils.h"
+#include "mozilla/dom/ReferrerInfoUtils.h"
+#include "mozilla/ipc/IPDLParamTraits.h"
+#include "mozilla/ipc/ProtocolUtils.h"
+#include "mozilla/ipc/URIUtils.h"
+
+extern mozilla::LazyLogModule gSHLog;
+
+namespace mozilla {
+namespace dom {
+
+SessionHistoryInfo::SessionHistoryInfo(nsDocShellLoadState* aLoadState,
+                                       nsIChannel* aChannel)
+    : mURI(aLoadState->URI()),
+      mOriginalURI(aLoadState->OriginalURI()),
+      mResultPrincipalURI(aLoadState->ResultPrincipalURI()),
+      mPostData(aLoadState->PostDataStream()),
+      mLoadType(aLoadState->LoadType()),
+      mSrcdocData(aLoadState->SrcdocData()),
+      mBaseURI(aLoadState->BaseURI()),
+      mLoadReplace(aLoadState->LoadReplace()),
+      /* FIXME Should this be aLoadState->IsSrcdocLoad()? */
+      mIsSrcdocEntry(!aLoadState->SrcdocData().IsEmpty()),
+      mHasUserInteraction(false),
+      mSharedState(SharedState::Create(
+          aLoadState->TriggeringPrincipal(), aLoadState->PrincipalToInherit(),
+          aLoadState->PartitionedPrincipalToInherit(), aLoadState->Csp(),
+          /* FIXME Is this correct? */
+          aLoadState->TypeHint())) {
+  if (nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel)) {
+    mReferrerInfo = httpChannel->GetReferrerInfo();
+  }
+
+  MaybeUpdateTitleFromURI();
+}
+
+SessionHistoryInfo::SessionHistoryInfo(
+    const SessionHistoryInfo& aSharedStateFrom, nsIURI* aURI)
+    : mURI(aURI), mSharedState(aSharedStateFrom.mSharedState) {
+  MaybeUpdateTitleFromURI();
+}
+
+SessionHistoryInfo::SessionHistoryInfo(
+    nsIURI* aURI, nsIPrincipal* aTriggeringPrincipal,
+    nsIPrincipal* aPrincipalToInherit,
+    nsIPrincipal* aPartitionedPrincipalToInherit,
+    nsIContentSecurityPolicy* aCsp, const nsACString& aContentType)
+    : mURI(aURI),
+      mSharedState(SharedState::Create(
+          aTriggeringPrincipal, aPrincipalToInherit,
+          aPartitionedPrincipalToInherit, aCsp, aContentType)) {
+  MaybeUpdateTitleFromURI();
+}
+
+SessionHistoryInfo::SessionHistoryInfo(
+    nsIChannel* aChannel, uint32_t aLoadType,
+    nsIPrincipal* aPartitionedPrincipalToInherit,
+    nsIContentSecurityPolicy* aCsp) {
+  aChannel->GetURI(getter_AddRefs(mURI));
+  mLoadType = aLoadType;
+
+  nsCOMPtr<nsILoadInfo> loadInfo;
+  aChannel->GetLoadInfo(getter_AddRefs(loadInfo));
+
+  loadInfo->GetResultPrincipalURI(getter_AddRefs(mResultPrincipalURI));
+  loadInfo->GetTriggeringPrincipal(
+      getter_AddRefs(mSharedState.Get()->mTriggeringPrincipal));
+  loadInfo->GetPrincipalToInherit(
+      getter_AddRefs(mSharedState.Get()->mPrincipalToInherit));
+
+  mSharedState.Get()->mPartitionedPrincipalToInherit =
+      aPartitionedPrincipalToInherit;
+  mSharedState.Get()->mCsp = aCsp;
+  aChannel->GetContentType(mSharedState.Get()->mContentType);
+  aChannel->GetOriginalURI(getter_AddRefs(mOriginalURI));
+
+  uint32_t loadFlags;
+  aChannel->GetLoadFlags(&loadFlags);
+  mLoadReplace = !!(loadFlags & nsIChannel::LOAD_REPLACE);
+
+  MaybeUpdateTitleFromURI();
+
+  if (nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel)) {
+    mReferrerInfo = httpChannel->GetReferrerInfo();
+  }
+}
+
+void SessionHistoryInfo::Reset(nsIURI* aURI, const nsID& aDocShellID,
+                               bool aDynamicCreation,
+                               nsIPrincipal* aTriggeringPrincipal,
+                               nsIPrincipal* aPrincipalToInherit,
+                               nsIPrincipal* aPartitionedPrincipalToInherit,
+                               nsIContentSecurityPolicy* aCsp,
+                               const nsACString& aContentType) {
+  mURI = aURI;
+  mOriginalURI = nullptr;
+  mResultPrincipalURI = nullptr;
+  mReferrerInfo = nullptr;
+  // Default title is the URL.
+  nsAutoCString spec;
+  if (NS_SUCCEEDED(mURI->GetSpec(spec))) {
+    CopyUTF8toUTF16(spec, mTitle);
+  }
+  mPostData = nullptr;
+  mLoadType = 0;
+  mScrollPositionX = 0;
+  mScrollPositionY = 0;
+  mStateData = nullptr;
+  mSrcdocData.Truncate();
+  mBaseURI = nullptr;
+  mLoadReplace = false;
+  mURIWasModified = false;
+  mIsSrcdocEntry = false;
+  mScrollRestorationIsManual = false;
+  mPersist = false;
+  mHasUserInteraction = false;
+
+  mSharedState.Get()->mTriggeringPrincipal = aTriggeringPrincipal;
+  mSharedState.Get()->mPrincipalToInherit = aPrincipalToInherit;
+  mSharedState.Get()->mPartitionedPrincipalToInherit =
+      aPartitionedPrincipalToInherit;
+  mSharedState.Get()->mCsp = aCsp;
+  mSharedState.Get()->mContentType = aContentType;
+  mSharedState.Get()->mLayoutHistoryState = nullptr;
+}
+
+void SessionHistoryInfo::MaybeUpdateTitleFromURI() {
+  if (mTitle.IsEmpty() && mURI) {
+    // Default title is the URL.
+    nsAutoCString spec;
+    if (NS_SUCCEEDED(mURI->GetSpec(spec))) {
+      AppendUTF8toUTF16(spec, mTitle);
+    }
+  }
+}
+
+uint64_t SessionHistoryInfo::SharedId() const {
+  return mSharedState.Get()->mId;
+}
+
+nsILayoutHistoryState* SessionHistoryInfo::GetLayoutHistoryState() {
+  return mSharedState.Get()->mLayoutHistoryState;
+}
+
+void SessionHistoryInfo::SetLayoutHistoryState(nsILayoutHistoryState* aState) {
+  mSharedState.Get()->mLayoutHistoryState = aState;
+}
+
+nsIPrincipal* SessionHistoryInfo::GetTriggeringPrincipal() const {
+  return mSharedState.Get()->mTriggeringPrincipal;
+}
+
+nsIPrincipal* SessionHistoryInfo::GetPrincipalToInherit() const {
+  return mSharedState.Get()->mPrincipalToInherit;
+}
+
+nsIPrincipal* SessionHistoryInfo::GetPartitionedPrincipalToInherit() const {
+  return mSharedState.Get()->mPartitionedPrincipalToInherit;
+}
+
+nsIContentSecurityPolicy* SessionHistoryInfo::GetCsp() const {
+  return mSharedState.Get()->mCsp;
+}
+
+uint32_t SessionHistoryInfo::GetCacheKey() const {
+  return mSharedState.Get()->mCacheKey;
+}
+
+void SessionHistoryInfo::SetCacheKey(uint32_t aCacheKey) {
+  mSharedState.Get()->mCacheKey = aCacheKey;
+}
+
+bool SessionHistoryInfo::IsSubFrame() const {
+  return mSharedState.Get()->mIsFrameNavigation;
+}
+
+void SessionHistoryInfo::FillLoadInfo(nsDocShellLoadState& aLoadState) const {
+  aLoadState.SetOriginalURI(mOriginalURI);
+  aLoadState.SetMaybeResultPrincipalURI(Some(mResultPrincipalURI));
+  aLoadState.SetLoadReplace(mLoadReplace);
+  aLoadState.SetPostDataStream(mPostData);
+  aLoadState.SetReferrerInfo(mReferrerInfo);
+
+  aLoadState.SetTypeHint(mSharedState.Get()->mContentType);
+  aLoadState.SetTriggeringPrincipal(mSharedState.Get()->mTriggeringPrincipal);
+  aLoadState.SetPrincipalToInherit(mSharedState.Get()->mPrincipalToInherit);
+  aLoadState.SetPartitionedPrincipalToInherit(
+      mSharedState.Get()->mPartitionedPrincipalToInherit);
+  aLoadState.SetCsp(mSharedState.Get()->mCsp);
+
+  // Do not inherit principal from document (security-critical!);
+  uint32_t flags = nsDocShell::InternalLoad::INTERNAL_LOAD_FLAGS_NONE;
+
+  // Passing nullptr as aSourceDocShell gives the same behaviour as before
+  // aSourceDocShell was introduced. According to spec we should be passing
+  // the source browsing context that was used when the history entry was
+  // first created. bug 947716 has been created to address this issue.
+  nsAutoString srcdoc;
+  nsCOMPtr<nsIURI> baseURI;
+  if (mIsSrcdocEntry) {
+    srcdoc = mSrcdocData;
+    baseURI = mBaseURI;
+    flags |= nsDocShell::InternalLoad::INTERNAL_LOAD_FLAGS_IS_SRCDOC;
+  } else {
+    srcdoc = VoidString();
+  }
+  aLoadState.SetSrcdocData(srcdoc);
+  aLoadState.SetBaseURI(baseURI);
+  aLoadState.SetLoadFlags(flags);
+
+  aLoadState.SetFirstParty(true);
+}
+/* static */
+SessionHistoryInfo::SharedState SessionHistoryInfo::SharedState::Create(
+    nsIPrincipal* aTriggeringPrincipal, nsIPrincipal* aPrincipalToInherit,
+    nsIPrincipal* aPartitionedPrincipalToInherit,
+    nsIContentSecurityPolicy* aCsp, const nsACString& aContentType) {
+  if (XRE_IsParentProcess()) {
+    return SharedState(new SHEntrySharedParentState(
+        aTriggeringPrincipal, aPrincipalToInherit,
+        aPartitionedPrincipalToInherit, aCsp, aContentType));
+  }
+
+  return SharedState(MakeUnique<SHEntrySharedState>(
+      aTriggeringPrincipal, aPrincipalToInherit, aPartitionedPrincipalToInherit,
+      aCsp, aContentType));
+}
+
+SessionHistoryInfo::SharedState::SharedState() { Init(); }
+
+SessionHistoryInfo::SharedState::SharedState(
+    const SessionHistoryInfo::SharedState& aOther) {
+  Init(aOther);
+}
+
+SessionHistoryInfo::SharedState::SharedState(
+    const Maybe<const SessionHistoryInfo::SharedState&>& aOther) {
+  if (aOther.isSome()) {
+    Init(aOther.ref());
+  } else {
+    Init();
+  }
+}
+
+SessionHistoryInfo::SharedState::~SharedState() {
+  if (XRE_IsParentProcess()) {
+    mParent
+        .RefPtr<SHEntrySharedParentState>::~RefPtr<SHEntrySharedParentState>();
+  } else {
+    mChild.UniquePtr<SHEntrySharedState>::~UniquePtr<SHEntrySharedState>();
+  }
+}
+
+SessionHistoryInfo::SharedState& SessionHistoryInfo::SharedState::operator=(
+    const SessionHistoryInfo::SharedState& aOther) {
+  if (this != &aOther) {
+    if (XRE_IsParentProcess()) {
+      mParent = aOther.mParent;
+    } else {
+      mChild = MakeUnique<SHEntrySharedState>(*aOther.mChild);
+    }
+  }
+  return *this;
+}
+
+SHEntrySharedState* SessionHistoryInfo::SharedState::Get() const {
+  if (XRE_IsParentProcess()) {
+    return mParent;
+  }
+
+  return mChild.get();
+}
+
+void SessionHistoryInfo::SharedState::ChangeId(uint64_t aId) {
+  if (XRE_IsParentProcess()) {
+    mParent->ChangeId(aId);
+  } else {
+    mChild->mId = aId;
+  }
+}
+
+void SessionHistoryInfo::SharedState::Init() {
+  if (XRE_IsParentProcess()) {
+    new (&mParent)
+        RefPtr<SHEntrySharedParentState>(new SHEntrySharedParentState());
+  } else {
+    new (&mChild)
+        UniquePtr<SHEntrySharedState>(MakeUnique<SHEntrySharedState>());
+  }
+}
+
+void SessionHistoryInfo::SharedState::Init(
+    const SessionHistoryInfo::SharedState& aOther) {
+  if (XRE_IsParentProcess()) {
+    new (&mParent) RefPtr<SHEntrySharedParentState>(aOther.mParent);
+  } else {
+    new (&mChild) UniquePtr<SHEntrySharedState>(
+        MakeUnique<SHEntrySharedState>(*aOther.mChild));
+  }
+}
+
+static uint64_t gLoadingSessionHistoryInfoLoadId = 0;
+
+nsDataHashtable<nsUint64HashKey, SessionHistoryEntry*>*
+    SessionHistoryEntry::sLoadIdToEntry = nullptr;
+
+LoadingSessionHistoryInfo::LoadingSessionHistoryInfo(
+    SessionHistoryEntry* aEntry)
+    : mInfo(aEntry->Info()), mLoadId(++gLoadingSessionHistoryInfoLoadId) {
+  SessionHistoryEntry::SetByLoadId(mLoadId, aEntry);
+}
+
+LoadingSessionHistoryInfo::LoadingSessionHistoryInfo(
+    SessionHistoryEntry* aEntry, uint64_t aLoadId)
+    : mInfo(aEntry->Info()), mLoadId(aLoadId) {
+  MOZ_ASSERT(SessionHistoryEntry::sLoadIdToEntry &&
+             SessionHistoryEntry::sLoadIdToEntry->Get(aLoadId) == aEntry);
+}
+
+already_AddRefed<nsDocShellLoadState>
+LoadingSessionHistoryInfo::CreateLoadInfo() const {
+  RefPtr<nsDocShellLoadState> loadState(
+      new nsDocShellLoadState(mInfo.GetURI()));
+
+  mInfo.FillLoadInfo(*loadState);
+
+  loadState->SetLoadingSessionHistoryInfo(*this);
+
+  return loadState.forget();
+}
+
+static uint32_t gEntryID;
+
+SessionHistoryEntry* SessionHistoryEntry::GetByLoadId(uint64_t aLoadId) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  if (!sLoadIdToEntry) {
+    return nullptr;
+  }
+
+  return sLoadIdToEntry->Get(aLoadId);
+}
+
+void SessionHistoryEntry::SetByLoadId(uint64_t aLoadId,
+                                      SessionHistoryEntry* aEntry) {
+  if (!sLoadIdToEntry) {
+    sLoadIdToEntry =
+        new nsDataHashtable<nsUint64HashKey, SessionHistoryEntry*>();
+  }
+
+  MOZ_LOG(
+      gSHLog, LogLevel::Verbose,
+      ("SessionHistoryEntry::SetByLoadId(%" PRIu64 " - %p)", aLoadId, aEntry));
+  sLoadIdToEntry->Put(aLoadId, aEntry);
+}
+
+void SessionHistoryEntry::RemoveLoadId(uint64_t aLoadId) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  if (!sLoadIdToEntry) {
+    return;
+  }
+
+  MOZ_LOG(gSHLog, LogLevel::Verbose,
+          ("SHEntry::RemoveLoadId(%" PRIu64 ")", aLoadId));
+  sLoadIdToEntry->Remove(aLoadId);
+}
+
+SessionHistoryEntry::SessionHistoryEntry()
+    : mInfo(new SessionHistoryInfo()), mID(++gEntryID) {}
+
+SessionHistoryEntry::SessionHistoryEntry(nsDocShellLoadState* aLoadState,
+                                         nsIChannel* aChannel)
+    : mInfo(new SessionHistoryInfo(aLoadState, aChannel)), mID(++gEntryID) {}
+
+SessionHistoryEntry::SessionHistoryEntry(SessionHistoryInfo* aInfo)
+    : mInfo(MakeUnique<SessionHistoryInfo>(*aInfo)), mID(++gEntryID) {}
+
+SessionHistoryEntry::SessionHistoryEntry(const SessionHistoryEntry& aEntry)
+    : mInfo(MakeUnique<SessionHistoryInfo>(*aEntry.mInfo)),
+      mParent(aEntry.mParent),
+      mID(aEntry.mID) {}
+
+SessionHistoryEntry::~SessionHistoryEntry() {
+  // Null out the mParent pointers on all our kids.
+  for (nsISHEntry* entry : mChildren) {
+    if (entry) {
+      entry->SetParent(nullptr);
+    }
+  }
+
+  if (sLoadIdToEntry) {
+    sLoadIdToEntry->RemoveIf(
+        [this](auto& aIter) { return aIter.Data() == this; });
+    if (sLoadIdToEntry->IsEmpty()) {
+      delete sLoadIdToEntry;
+      sLoadIdToEntry = nullptr;
+    }
+  }
+}
+
+NS_IMPL_ISUPPORTS(SessionHistoryEntry, nsISHEntry, SessionHistoryEntry)
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetURI(nsIURI** aURI) {
+  nsCOMPtr<nsIURI> uri = mInfo->mURI;
+  uri.forget(aURI);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetURI(nsIURI* aURI) {
+  mInfo->mURI = aURI;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetOriginalURI(nsIURI** aOriginalURI) {
+  nsCOMPtr<nsIURI> originalURI = mInfo->mOriginalURI;
+  originalURI.forget(aOriginalURI);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetOriginalURI(nsIURI* aOriginalURI) {
+  mInfo->mOriginalURI = aOriginalURI;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetResultPrincipalURI(nsIURI** aResultPrincipalURI) {
+  nsCOMPtr<nsIURI> resultPrincipalURI = mInfo->mResultPrincipalURI;
+  resultPrincipalURI.forget(aResultPrincipalURI);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetResultPrincipalURI(nsIURI* aResultPrincipalURI) {
+  mInfo->mResultPrincipalURI = aResultPrincipalURI;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetLoadReplace(bool* aLoadReplace) {
+  *aLoadReplace = mInfo->mLoadReplace;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetLoadReplace(bool aLoadReplace) {
+  mInfo->mLoadReplace = aLoadReplace;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetTitle(nsAString& aTitle) {
+  aTitle = mInfo->mTitle;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetTitle(const nsAString& aTitle) {
+  mInfo->SetTitle(aTitle);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetName(nsAString& aName) {
+  aName = mInfo->mName;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetName(const nsAString& aName) {
+  mInfo->mName = aName;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetIsSubFrame(bool* aIsSubFrame) {
+  *aIsSubFrame = SharedInfo()->mIsFrameNavigation;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetIsSubFrame(bool aIsSubFrame) {
+  SharedInfo()->mIsFrameNavigation = aIsSubFrame;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetHasUserInteraction(bool* aFlag) {
+  // The back button and menulist deal with root/top-level
+  // session history entries, thus we annotate only the root entry.
+  if (!mParent) {
+    *aFlag = mInfo->mHasUserInteraction;
+  } else {
+    nsCOMPtr<nsISHEntry> root = nsSHistory::GetRootSHEntry(this);
+    root->GetHasUserInteraction(aFlag);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetHasUserInteraction(bool aFlag) {
+  // The back button and menulist deal with root/top-level
+  // session history entries, thus we annotate only the root entry.
+  if (!mParent) {
+    mInfo->mHasUserInteraction = aFlag;
+  } else {
+    nsCOMPtr<nsISHEntry> root = nsSHistory::GetRootSHEntry(this);
+    root->SetHasUserInteraction(aFlag);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetReferrerInfo(nsIReferrerInfo** aReferrerInfo) {
+  nsCOMPtr<nsIReferrerInfo> referrerInfo = mInfo->mReferrerInfo;
+  referrerInfo.forget(aReferrerInfo);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetReferrerInfo(nsIReferrerInfo* aReferrerInfo) {
+  mInfo->mReferrerInfo = aReferrerInfo;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetContentViewer(nsIContentViewer** aContentViewer) {
+  NS_WARNING("This lives in the child process");
+  *aContentViewer = nullptr;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetContentViewer(nsIContentViewer* aContentViewer) {
+  MOZ_CRASH("This lives in the child process");
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetSticky(bool* aSticky) {
+  *aSticky = SharedInfo()->mSticky;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetSticky(bool aSticky) {
+  SharedInfo()->mSticky = aSticky;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetWindowState(nsISupports** aWindowState) {
+  MOZ_CRASH("This lives in the child process");
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetWindowState(nsISupports* aWindowState) {
+  MOZ_CRASH("This lives in the child process");
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetRefreshURIList(nsIMutableArray** aRefreshURIList) {
+  MOZ_CRASH("This lives in the child process");
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetRefreshURIList(nsIMutableArray* aRefreshURIList) {
+  MOZ_CRASH("This lives in the child process");
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetPostData(nsIInputStream** aPostData) {
+  nsCOMPtr<nsIInputStream> postData = mInfo->mPostData;
+  postData.forget(aPostData);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetPostData(nsIInputStream* aPostData) {
+  mInfo->mPostData = aPostData;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetLayoutHistoryState(
+    nsILayoutHistoryState** aLayoutHistoryState) {
+  nsCOMPtr<nsILayoutHistoryState> layoutHistoryState =
+      SharedInfo()->mLayoutHistoryState;
+  layoutHistoryState.forget(aLayoutHistoryState);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetLayoutHistoryState(
+    nsILayoutHistoryState* aLayoutHistoryState) {
+  SharedInfo()->mLayoutHistoryState = aLayoutHistoryState;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetParent(nsISHEntry** aParent) {
+  nsCOMPtr<nsISHEntry> parent = mParent;
+  parent.forget(aParent);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetParent(nsISHEntry* aParent) {
+  mParent = aParent;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetLoadType(uint32_t* aLoadType) {
+  *aLoadType = mInfo->mLoadType;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetLoadType(uint32_t aLoadType) {
+  mInfo->mLoadType = aLoadType;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetID(uint32_t* aID) {
+  *aID = mID;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetID(uint32_t aID) {
+  mID = aID;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetCacheKey(uint32_t* aCacheKey) {
+  *aCacheKey = SharedInfo()->mCacheKey;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetCacheKey(uint32_t aCacheKey) {
+  SharedInfo()->mCacheKey = aCacheKey;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetSaveLayoutStateFlag(bool* aSaveLayoutStateFlag) {
+  *aSaveLayoutStateFlag = SharedInfo()->mSaveLayoutState;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetSaveLayoutStateFlag(bool aSaveLayoutStateFlag) {
+  SharedInfo()->mSaveLayoutState = aSaveLayoutStateFlag;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetContentType(nsACString& aContentType) {
+  aContentType = SharedInfo()->mContentType;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetContentType(const nsACString& aContentType) {
+  SharedInfo()->mContentType = aContentType;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetURIWasModified(bool* aURIWasModified) {
+  *aURIWasModified = mInfo->mURIWasModified;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetURIWasModified(bool aURIWasModified) {
+  mInfo->mURIWasModified = aURIWasModified;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetTriggeringPrincipal(
+    nsIPrincipal** aTriggeringPrincipal) {
+  nsCOMPtr<nsIPrincipal> triggeringPrincipal =
+      SharedInfo()->mTriggeringPrincipal;
+  triggeringPrincipal.forget(aTriggeringPrincipal);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetTriggeringPrincipal(
+    nsIPrincipal* aTriggeringPrincipal) {
+  SharedInfo()->mTriggeringPrincipal = aTriggeringPrincipal;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetPrincipalToInherit(nsIPrincipal** aPrincipalToInherit) {
+  nsCOMPtr<nsIPrincipal> principalToInherit = SharedInfo()->mPrincipalToInherit;
+  principalToInherit.forget(aPrincipalToInherit);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetPrincipalToInherit(nsIPrincipal* aPrincipalToInherit) {
+  SharedInfo()->mPrincipalToInherit = aPrincipalToInherit;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetPartitionedPrincipalToInherit(
+    nsIPrincipal** aPartitionedPrincipalToInherit) {
+  nsCOMPtr<nsIPrincipal> partitionedPrincipalToInherit =
+      SharedInfo()->mPartitionedPrincipalToInherit;
+  partitionedPrincipalToInherit.forget(aPartitionedPrincipalToInherit);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetPartitionedPrincipalToInherit(
+    nsIPrincipal* aPartitionedPrincipalToInherit) {
+  SharedInfo()->mPartitionedPrincipalToInherit = aPartitionedPrincipalToInherit;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetCsp(nsIContentSecurityPolicy** aCsp) {
+  nsCOMPtr<nsIContentSecurityPolicy> csp = SharedInfo()->mCsp;
+  csp.forget(aCsp);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetCsp(nsIContentSecurityPolicy* aCsp) {
+  SharedInfo()->mCsp = aCsp;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetStateData(nsIStructuredCloneContainer** aStateData) {
+  RefPtr<nsStructuredCloneContainer> stateData = mInfo->mStateData;
+  stateData.forget(aStateData);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetStateData(nsIStructuredCloneContainer* aStateData) {
+  mInfo->mStateData = static_cast<nsStructuredCloneContainer*>(aStateData);
+  return NS_OK;
+}
+
+const nsID& SessionHistoryEntry::DocshellID() const {
+  return SharedInfo()->mDocShellID;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetDocshellID(nsID& aDocshellID) {
+  aDocshellID = DocshellID();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetDocshellID(const nsID& aDocshellID) {
+  SharedInfo()->mDocShellID = aDocshellID;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetIsSrcdocEntry(bool* aIsSrcdocEntry) {
+  *aIsSrcdocEntry = mInfo->mIsSrcdocEntry;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetSrcdocData(nsAString& aSrcdocData) {
+  aSrcdocData = mInfo->mSrcdocData;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetSrcdocData(const nsAString& aSrcdocData) {
+  mInfo->mSrcdocData = aSrcdocData;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetBaseURI(nsIURI** aBaseURI) {
+  nsCOMPtr<nsIURI> baseURI = mInfo->mBaseURI;
+  baseURI.forget(aBaseURI);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetBaseURI(nsIURI* aBaseURI) {
+  mInfo->mBaseURI = aBaseURI;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetScrollRestorationIsManual(
+    bool* aScrollRestorationIsManual) {
+  *aScrollRestorationIsManual = mInfo->mScrollRestorationIsManual;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetScrollRestorationIsManual(
+    bool aScrollRestorationIsManual) {
+  mInfo->mScrollRestorationIsManual = aScrollRestorationIsManual;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetLoadedInThisProcess(bool* aLoadedInThisProcess) {
+  // FIXME
+  //*aLoadedInThisProcess = mInfo->mLoadedInThisProcess;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetShistory(nsISHistory** aShistory) {
+  nsCOMPtr<nsISHistory> sHistory = do_QueryReferent(SharedInfo()->mSHistory);
+  sHistory.forget(aShistory);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetShistory(nsISHistory* aShistory) {
+  nsWeakPtr shistory = do_GetWeakReference(aShistory);
+  // mSHistory can not be changed once it's set
+  MOZ_ASSERT(!SharedInfo()->mSHistory || (SharedInfo()->mSHistory == shistory));
+  SharedInfo()->mSHistory = shistory;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetLastTouched(uint32_t* aLastTouched) {
+  *aLastTouched = SharedInfo()->mLastTouched;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetLastTouched(uint32_t aLastTouched) {
+  SharedInfo()->mLastTouched = aLastTouched;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetChildCount(int32_t* aChildCount) {
+  *aChildCount = mChildren.Length();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetPersist(bool* aPersist) {
+  *aPersist = mInfo->mPersist;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetPersist(bool aPersist) {
+  mInfo->mPersist = aPersist;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetScrollPosition(int32_t* aX, int32_t* aY) {
+  *aX = mInfo->mScrollPositionX;
+  *aY = mInfo->mScrollPositionY;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetScrollPosition(int32_t aX, int32_t aY) {
+  mInfo->mScrollPositionX = aX;
+  mInfo->mScrollPositionY = aY;
+  return NS_OK;
+}
+
+NS_IMETHODIMP_(void)
+SessionHistoryEntry::GetViewerBounds(nsIntRect& bounds) {
+  bounds = SharedInfo()->mViewerBounds;
+}
+
+NS_IMETHODIMP_(void)
+SessionHistoryEntry::SetViewerBounds(const nsIntRect& bounds) {
+  SharedInfo()->mViewerBounds = bounds;
+}
+
+NS_IMETHODIMP_(void)
+SessionHistoryEntry::AddChildShell(nsIDocShellTreeItem* shell) {
+  MOZ_CRASH("This lives in the child process");
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::ChildShellAt(int32_t index,
+                                  nsIDocShellTreeItem** _retval) {
+  MOZ_CRASH("This lives in the child process");
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP_(void)
+SessionHistoryEntry::ClearChildShells() {
+  MOZ_CRASH("This lives in the child process");
+}
+
+NS_IMETHODIMP_(void)
+SessionHistoryEntry::SyncPresentationState() {
+  MOZ_CRASH("This lives in the child process");
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::InitLayoutHistoryState(
+    nsILayoutHistoryState** aLayoutHistoryState) {
+  if (!SharedInfo()->mLayoutHistoryState) {
+    nsCOMPtr<nsILayoutHistoryState> historyState;
+    historyState = NS_NewLayoutHistoryState();
+    SetLayoutHistoryState(historyState);
+  }
+
+  return GetLayoutHistoryState(aLayoutHistoryState);
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::Create(
+    nsIURI* aURI, const nsAString& aTitle, nsIInputStream* aInputStream,
+    uint32_t aCacheKey, const nsACString& aContentType,
+    nsIPrincipal* aTriggeringPrincipal, nsIPrincipal* aPrincipalToInherit,
+    nsIPrincipal* aPartitionedPrincipalToInherit,
+    nsIContentSecurityPolicy* aCsp, const nsID& aDocshellID,
+    bool aDynamicCreation, nsIURI* aOriginalURI, nsIURI* aResultPrincipalURI,
+    bool aLoadReplace, nsIReferrerInfo* aReferrerInfo, const nsAString& aSrcdoc,
+    bool aSrcdocEntry, nsIURI* aBaseURI, bool aSaveLayoutState, bool aExpired) {
+  MOZ_CRASH("Might need to implement this");
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::Clone(nsISHEntry** aEntry) {
+  RefPtr<SessionHistoryEntry> entry = new SessionHistoryEntry(*this);
+
+  // These are not copied for some reason, we're not sure why.
+  entry->mInfo->mLoadType = 0;
+  entry->mInfo->mScrollPositionX = 0;
+  entry->mInfo->mScrollPositionY = 0;
+  entry->mInfo->mScrollRestorationIsManual = false;
+
+  entry->mInfo->mHasUserInteraction = false;
+
+  entry.forget(aEntry);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP_(nsDocShellEditorData*)
+SessionHistoryEntry::ForgetEditorData() {
+  MOZ_CRASH("This lives in the child process");
+  return nullptr;
+}
+
+NS_IMETHODIMP_(void)
+SessionHistoryEntry::SetEditorData(nsDocShellEditorData* aData) {
+  NS_WARNING("This lives in the child process");
+}
+
+NS_IMETHODIMP_(bool)
+SessionHistoryEntry::HasDetachedEditor() {
+  NS_WARNING("This lives in the child process");
+  return false;
+}
+
+NS_IMETHODIMP_(bool)
+SessionHistoryEntry::IsDynamicallyAdded() {
+  return SharedInfo()->mDynamicallyCreated;
+}
+
+void SessionHistoryEntry::SetIsDynamicallyAdded(bool aDynamic) {
+  MOZ_ASSERT_IF(SharedInfo()->mDynamicallyCreated, aDynamic);
+  SharedInfo()->mDynamicallyCreated = aDynamic;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::HasDynamicallyAddedChild(bool* aHasDynamicallyAddedChild) {
+  for (const auto& child : mChildren) {
+    if (child && child->IsDynamicallyAdded()) {
+      *aHasDynamicallyAddedChild = true;
+      return NS_OK;
+    }
+  }
+  *aHasDynamicallyAddedChild = false;
+  return NS_OK;
+}
+
+NS_IMETHODIMP_(bool)
+SessionHistoryEntry::HasBFCacheEntry(nsIBFCacheEntry* aEntry) {
+  MOZ_CRASH("This lives in the child process");
+  return false;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::AdoptBFCacheEntry(nsISHEntry* aEntry) {
+  nsCOMPtr<SessionHistoryEntry> she = do_QueryInterface(aEntry);
+  NS_ENSURE_STATE(she && she->mInfo->mSharedState.Get());
+
+  mInfo->mSharedState =
+      static_cast<SessionHistoryEntry*>(aEntry)->mInfo->mSharedState;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::AbandonBFCacheEntry() {
+  MOZ_CRASH("This lives in the child process");
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SharesDocumentWith(nsISHEntry* aEntry,
+                                        bool* aSharesDocumentWith) {
+  SessionHistoryEntry* entry = static_cast<SessionHistoryEntry*>(aEntry);
+
+  MOZ_ASSERT_IF(entry->SharedInfo() != SharedInfo(),
+                entry->SharedInfo()->GetId() != SharedInfo()->GetId());
+
+  *aSharesDocumentWith = entry->SharedInfo() == SharedInfo();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::SetLoadTypeAsHistory() {
+  mInfo->mLoadType = LOAD_HISTORY;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::AddChild(nsISHEntry* aChild, int32_t aOffset,
+                              bool aUseRemoteSubframes) {
+  nsCOMPtr<SessionHistoryEntry> child = do_QueryInterface(aChild);
+  MOZ_ASSERT_IF(aChild, child);
+  AddChild(child, aOffset, aUseRemoteSubframes);
+
+  return NS_OK;
+}
+
+void SessionHistoryEntry::AddChild(SessionHistoryEntry* aChild, int32_t aOffset,
+                                   bool aUseRemoteSubframes) {
+  if (aChild) {
+    aChild->SetParent(this);
+  }
+
+  if (aOffset < 0) {
+    mChildren.AppendElement(aChild);
+    return;
+  }
+
+  //
+  // Bug 52670: Ensure children are added in order.
+  //
+  //  Later frames in the child list may load faster and get appended
+  //  before earlier frames, causing session history to be scrambled.
+  //  By growing the list here, they are added to the right position.
+
+  int32_t length = mChildren.Length();
+
+  //  Assert that aOffset will not be so high as to grow us a lot.
+  NS_ASSERTION(aOffset < length + 1023, "Large frames array!\n");
+
+  // If the new child is dynamically added, try to add it to aOffset, but if
+  // there are non-dynamically added children, the child must be after those.
+  if (aChild && aChild->IsDynamicallyAdded()) {
+    int32_t lastNonDyn = aOffset - 1;
+    for (int32_t i = aOffset; i < length; ++i) {
+      SessionHistoryEntry* entry = mChildren[i];
+      if (entry) {
+        if (entry->IsDynamicallyAdded()) {
+          break;
+        }
+
+        lastNonDyn = i;
+      }
+    }
+
+    // If aOffset is larger than Length(), we must first truncate the array.
+    if (aOffset > length) {
+      mChildren.SetLength(aOffset);
+    }
+
+    mChildren.InsertElementAt(lastNonDyn + 1, aChild);
+
+    return;
+  }
+
+  // If the new child isn't dynamically added, it should be set to aOffset.
+  // If there are dynamically added children before that, those must be moved
+  // to be after aOffset.
+  if (length > 0) {
+    int32_t start = std::min(length - 1, aOffset);
+    int32_t dynEntryIndex = -1;
+    DebugOnly<SessionHistoryEntry*> dynEntry = nullptr;
+    for (int32_t i = start; i >= 0; --i) {
+      SessionHistoryEntry* entry = mChildren[i];
+      if (entry) {
+        if (!entry->IsDynamicallyAdded()) {
+          break;
+        }
+
+        dynEntryIndex = i;
+        dynEntry = entry;
+      }
+    }
+
+    if (dynEntryIndex >= 0) {
+      mChildren.InsertElementsAt(dynEntryIndex, aOffset - dynEntryIndex + 1);
+      NS_ASSERTION(mChildren[aOffset + 1] == dynEntry, "Whaat?");
+    }
+  }
+
+  // Make sure there isn't anything at aOffset.
+  if ((uint32_t)aOffset < mChildren.Length()) {
+    SessionHistoryEntry* oldChild = mChildren[aOffset];
+    if (oldChild && oldChild != aChild) {
+      // Under Fission, this can happen when a network-created iframe starts
+      // out in-process, moves out-of-process, and then switches back. At that
+      // point, we'll create a new network-created DocShell at the same index
+      // where we already have an entry for the original network-created
+      // DocShell.
+      //
+      // This should ideally stop being an issue once the Fission-aware
+      // session history rewrite is complete.
+      NS_ASSERTION(
+          aUseRemoteSubframes,
+          "Adding a child where we already have a child? This may misbehave");
+      oldChild->SetParent(nullptr);
+    }
+  } else {
+    mChildren.SetLength(aOffset + 1);
+  }
+
+  mChildren.ReplaceElementAt(aOffset, aChild);
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::RemoveChild(nsISHEntry* aChild) {
+  NS_ENSURE_TRUE(aChild, NS_ERROR_FAILURE);
+
+  nsCOMPtr<SessionHistoryEntry> child = do_QueryInterface(aChild);
+  MOZ_ASSERT(child);
+  RemoveChild(child);
+
+  return NS_OK;
+}
+
+void SessionHistoryEntry::RemoveChild(SessionHistoryEntry* aChild) {
+  bool childRemoved = false;
+  if (aChild->IsDynamicallyAdded()) {
+    childRemoved = mChildren.RemoveElement(aChild);
+  } else {
+    int32_t index = mChildren.IndexOf(aChild);
+    if (index >= 0) {
+      // Other alive non-dynamic child docshells still keep mChildOffset,
+      // so we don't want to change the indices here.
+      mChildren.ReplaceElementAt(index, nullptr);
+      childRemoved = true;
+    }
+  }
+
+  if (childRemoved) {
+    aChild->SetParent(nullptr);
+
+    // reduce the child count, i.e. remove empty children at the end
+    for (int32_t i = mChildren.Length() - 1; i >= 0 && !mChildren[i]; --i) {
+      mChildren.RemoveElementAt(i);
+    }
+  }
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetChildAt(int32_t aIndex, nsISHEntry** aChild) {
+  nsCOMPtr<nsISHEntry> child = mChildren.SafeElementAt(aIndex);
+  child.forget(aChild);
+  return NS_OK;
+}
+
+NS_IMETHODIMP_(void)
+SessionHistoryEntry::GetChildSHEntryIfHasNoDynamicallyAddedChild(
+    int32_t aChildOffset, nsISHEntry** aChild) {
+  *aChild = nullptr;
+
+  bool dynamicallyAddedChild = false;
+  HasDynamicallyAddedChild(&dynamicallyAddedChild);
+  if (dynamicallyAddedChild) {
+    return;
+  }
+
+  // If the user did a shift-reload on this frameset page,
+  // we don't want to load the subframes from history.
+  if (IsForceReloadType(mInfo->mLoadType) || mInfo->mLoadType == LOAD_REFRESH) {
+    return;
+  }
+
+  /* Before looking for the subframe's url, check
+   * the expiration status of the parent. If the parent
+   * has expired from cache, then subframes will not be
+   * loaded from history in certain situations.
+   * If the user pressed reload and the parent frame has expired
+   *  from cache, we do not want to load the child frame from history.
+   */
+  if (SharedInfo()->mExpired && (mInfo->mLoadType == LOAD_RELOAD_NORMAL)) {
+    // The parent has expired. Return null.
+    *aChild = nullptr;
+    return;
+  }
+  // Get the child subframe from session history.
+  GetChildAt(aChildOffset, aChild);
+  if (*aChild) {
+    // Set the parent's Load Type on the child
+    (*aChild)->SetLoadType(mInfo->mLoadType);
+  }
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::ReplaceChild(nsISHEntry* aNewChild) {
+  NS_ENSURE_STATE(aNewChild);
+
+  nsCOMPtr<SessionHistoryEntry> newChild = do_QueryInterface(aNewChild);
+  MOZ_ASSERT(newChild);
+  return ReplaceChild(newChild) ? NS_OK : NS_ERROR_FAILURE;
+}
+
+bool SessionHistoryEntry::ReplaceChild(SessionHistoryEntry* aNewChild) {
+  const nsID& docshellID = aNewChild->DocshellID();
+
+  for (uint32_t i = 0; i < mChildren.Length(); ++i) {
+    if (mChildren[i] && docshellID == mChildren[i]->DocshellID()) {
+      mChildren[i]->SetParent(nullptr);
+      mChildren.ReplaceElementAt(i, aNewChild);
+      aNewChild->SetParent(this);
+
+      return true;
+    }
+  }
+
+  return false;
+}
+
+NS_IMETHODIMP_(void)
+SessionHistoryEntry::ClearEntry() {
+  int32_t childCount = GetChildCount();
+  // Remove all children of this entry
+  for (int32_t i = childCount; i > 0; --i) {
+    nsCOMPtr<nsISHEntry> child;
+    GetChildAt(i - 1, getter_AddRefs(child));
+    RemoveChild(child);
+  }
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::CreateLoadInfo(nsDocShellLoadState** aLoadState) {
+  NS_WARNING("We shouldn't be calling this!");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SessionHistoryEntry::GetBfcacheID(uint64_t* aBfcacheID) {
+  *aBfcacheID = SharedInfo()->mId;
+  return NS_OK;
+}
+
+NS_IMETHODIMP_(void)
+SessionHistoryEntry::SyncTreesForSubframeNavigation(
+    nsISHEntry* aEntry, mozilla::dom::BrowsingContext* aTopBC,
+    mozilla::dom::BrowsingContext* aIgnoreBC) {
+  // XXX Keep this in sync with nsSHEntry::SyncTreesForSubframeNavigation.
+  //
+  // We need to sync up the browsing context and session history trees for
+  // subframe navigation.  If the load was in a subframe, we forward up to
+  // the top browsing context, which will then recursively sync up all browsing
+  // contexts to their corresponding entries in the new session history tree. If
+  // we don't do this, then we can cache a content viewer on the wrong cloned
+  // entry, and subsequently restore it at the wrong time.
+  nsCOMPtr<nsISHEntry> newRootEntry = nsSHistory::GetRootSHEntry(aEntry);
+  if (newRootEntry) {
+    // newRootEntry is now the new root entry.
+    // Find the old root entry as well.
+
+    // Need a strong ref. on |oldRootEntry| so it isn't destroyed when
+    // SetChildHistoryEntry() does SwapHistoryEntries() (bug 304639).
+    nsCOMPtr<nsISHEntry> oldRootEntry = nsSHistory::GetRootSHEntry(this);
+
+    if (oldRootEntry) {
+      nsSHistory::SwapEntriesData data = {aIgnoreBC, newRootEntry, nullptr};
+      nsSHistory::SetChildHistoryEntry(oldRootEntry, aTopBC, 0, &data);
+    }
+  }
+}
+
+void SessionHistoryEntry::ReplaceWith(const SessionHistoryEntry& aSource) {
+  mInfo = MakeUnique<SessionHistoryInfo>(*aSource.mInfo);
+  mChildren.Clear();
+}
+
+SHEntrySharedParentState* SessionHistoryEntry::SharedInfo() const {
+  return static_cast<SHEntrySharedParentState*>(mInfo->mSharedState.Get());
+}
+
+void SessionHistoryEntry::SetInfo(SessionHistoryInfo* aInfo) {
+  // FIXME Assert that we're not changing shared state!
+  mInfo = MakeUnique<SessionHistoryInfo>(*aInfo);
+}
+
+}  // namespace dom
+
+namespace ipc {
+
+void IPDLParamTraits<dom::SessionHistoryInfo>::Write(
+    IPC::Message* aMsg, IProtocol* aActor,
+    const dom::SessionHistoryInfo& aParam) {
+  Maybe<Tuple<uint32_t, dom::ClonedMessageData>> stateData;
+  if (aParam.mStateData) {
+    stateData.emplace();
+    uint32_t version;
+    NS_ENSURE_SUCCESS_VOID(aParam.mStateData->GetFormatVersion(&version));
+    Get<0>(*stateData) = version;
+
+    JSStructuredCloneData& data = aParam.mStateData->Data();
+    auto iter = data.Start();
+    bool success;
+    Get<1>(*stateData).data().data = data.Borrow(iter, data.Size(), &success);
+    if (NS_WARN_IF(!success)) {
+      return;
+    }
+    MOZ_ASSERT(aParam.mStateData->PortIdentifiers().IsEmpty() &&
+               aParam.mStateData->BlobImpls().IsEmpty() &&
+               aParam.mStateData->InputStreams().IsEmpty());
+  }
+
+  WriteIPDLParam(aMsg, aActor, aParam.mURI);
+  WriteIPDLParam(aMsg, aActor, aParam.mOriginalURI);
+  WriteIPDLParam(aMsg, aActor, aParam.mResultPrincipalURI);
+  WriteIPDLParam(aMsg, aActor, aParam.mReferrerInfo);
+  WriteIPDLParam(aMsg, aActor, aParam.mTitle);
+  WriteIPDLParam(aMsg, aActor, aParam.mName);
+  WriteIPDLParam(aMsg, aActor, aParam.mPostData);
+  WriteIPDLParam(aMsg, aActor, aParam.mLoadType);
+  WriteIPDLParam(aMsg, aActor, aParam.mScrollPositionX);
+  WriteIPDLParam(aMsg, aActor, aParam.mScrollPositionY);
+  WriteIPDLParam(aMsg, aActor, stateData);
+  WriteIPDLParam(aMsg, aActor, aParam.mSrcdocData);
+  WriteIPDLParam(aMsg, aActor, aParam.mBaseURI);
+  WriteIPDLParam(aMsg, aActor, aParam.mLoadReplace);
+  WriteIPDLParam(aMsg, aActor, aParam.mURIWasModified);
+  WriteIPDLParam(aMsg, aActor, aParam.mIsSrcdocEntry);
+  WriteIPDLParam(aMsg, aActor, aParam.mScrollRestorationIsManual);
+  WriteIPDLParam(aMsg, aActor, aParam.mPersist);
+  WriteIPDLParam(aMsg, aActor, aParam.mHasUserInteraction);
+  WriteIPDLParam(aMsg, aActor, aParam.mSharedState.Get()->mId);
+  WriteIPDLParam(aMsg, aActor, aParam.mSharedState.Get()->mTriggeringPrincipal);
+  WriteIPDLParam(aMsg, aActor, aParam.mSharedState.Get()->mPrincipalToInherit);
+  WriteIPDLParam(aMsg, aActor,
+                 aParam.mSharedState.Get()->mPartitionedPrincipalToInherit);
+  WriteIPDLParam(aMsg, aActor, aParam.mSharedState.Get()->mCsp);
+  WriteIPDLParam(aMsg, aActor, aParam.mSharedState.Get()->mContentType);
+  WriteIPDLParam(aMsg, aActor, aParam.mSharedState.Get()->mLayoutHistoryState);
+  WriteIPDLParam(aMsg, aActor, aParam.mSharedState.Get()->mCacheKey);
+  WriteIPDLParam(aMsg, aActor, aParam.mSharedState.Get()->mIsFrameNavigation);
+}
+
+bool IPDLParamTraits<dom::SessionHistoryInfo>::Read(
+    const IPC::Message* aMsg, PickleIterator* aIter, IProtocol* aActor,
+    dom::SessionHistoryInfo* aResult) {
+  Maybe<Tuple<uint32_t, dom::ClonedMessageData>> stateData;
+  uint64_t sharedId;
+  if (!ReadIPDLParam(aMsg, aIter, aActor, &aResult->mURI) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mOriginalURI) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mResultPrincipalURI) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mReferrerInfo) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mTitle) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mName) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mPostData) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mLoadType) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mScrollPositionX) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mScrollPositionY) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &stateData) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mSrcdocData) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mBaseURI) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mLoadReplace) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mURIWasModified) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mIsSrcdocEntry) ||
+      !ReadIPDLParam(aMsg, aIter, aActor,
+                     &aResult->mScrollRestorationIsManual) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mPersist) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mHasUserInteraction) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &sharedId)) {
+    aActor->FatalError("Error reading fields for SessionHistoryInfo");
+    return false;
+  }
+
+  nsCOMPtr<nsIPrincipal> triggeringPrincipal;
+  nsCOMPtr<nsIPrincipal> principalToInherit;
+  nsCOMPtr<nsIPrincipal> partitionedPrincipalToInherit;
+  nsCOMPtr<nsIContentSecurityPolicy> csp;
+  nsCString contentType;
+  if (!ReadIPDLParam(aMsg, aIter, aActor, &triggeringPrincipal) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &principalToInherit) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &partitionedPrincipalToInherit) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &csp) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &contentType)) {
+    aActor->FatalError("Error reading fields for SessionHistoryInfo");
+    return false;
+  }
+
+  dom::SHEntrySharedParentState* sharedState = nullptr;
+  if (XRE_IsParentProcess()) {
+    sharedState = dom::SHEntrySharedParentState::Lookup(sharedId);
+  }
+
+  if (sharedState) {
+    aResult->mSharedState.Set(sharedState);
+
+    MOZ_ASSERT(triggeringPrincipal
+                   ? triggeringPrincipal->Equals(
+                         aResult->mSharedState.Get()->mTriggeringPrincipal)
+                   : !aResult->mSharedState.Get()->mTriggeringPrincipal,
+               "We don't expect this to change!");
+    MOZ_ASSERT(principalToInherit
+                   ? principalToInherit->Equals(
+                         aResult->mSharedState.Get()->mPrincipalToInherit)
+                   : !aResult->mSharedState.Get()->mPrincipalToInherit,
+               "We don't expect this to change!");
+    MOZ_ASSERT(
+        partitionedPrincipalToInherit
+            ? partitionedPrincipalToInherit->Equals(
+                  aResult->mSharedState.Get()->mPartitionedPrincipalToInherit)
+            : !aResult->mSharedState.Get()->mPartitionedPrincipalToInherit,
+        "We don't expect this to change!");
+    MOZ_ASSERT(
+        csp ? nsCSPContext::Equals(csp, aResult->mSharedState.Get()->mCsp)
+            : !aResult->mSharedState.Get()->mCsp,
+        "We don't expect this to change!");
+    MOZ_ASSERT(contentType.Equals(aResult->mSharedState.Get()->mContentType),
+               "We don't expect this to change!");
+  } else {
+    aResult->mSharedState.ChangeId(sharedId);
+    aResult->mSharedState.Get()->mTriggeringPrincipal =
+        triggeringPrincipal.forget();
+    aResult->mSharedState.Get()->mPrincipalToInherit =
+        principalToInherit.forget();
+    aResult->mSharedState.Get()->mPartitionedPrincipalToInherit =
+        partitionedPrincipalToInherit.forget();
+    aResult->mSharedState.Get()->mCsp = csp.forget();
+    aResult->mSharedState.Get()->mContentType = contentType;
+  }
+
+  if (!ReadIPDLParam(aMsg, aIter, aActor,
+                     &aResult->mSharedState.Get()->mLayoutHistoryState) ||
+      !ReadIPDLParam(aMsg, aIter, aActor,
+                     &aResult->mSharedState.Get()->mCacheKey) ||
+      !ReadIPDLParam(aMsg, aIter, aActor,
+                     &aResult->mSharedState.Get()->mIsFrameNavigation)) {
+    aActor->FatalError("Error reading fields for SessionHistoryInfo");
+    return false;
+  }
+
+  if (stateData.isSome()) {
+    uint32_t version = Get<0>(*stateData);
+    aResult->mStateData = new nsStructuredCloneContainer(version);
+    if (aActor->GetSide() == ChildSide) {
+      aResult->mStateData->StealFromClonedMessageDataForChild(
+          Get<1>(*stateData));
+    } else {
+      aResult->mStateData->StealFromClonedMessageDataForParent(
+          Get<1>(*stateData));
+    }
+  }
+  MOZ_ASSERT_IF(stateData.isNothing(), !aResult->mStateData);
+  return true;
+}
+
+void IPDLParamTraits<dom::LoadingSessionHistoryInfo>::Write(
+    IPC::Message* aMsg, IProtocol* aActor,
+    const dom::LoadingSessionHistoryInfo& aParam) {
+  WriteIPDLParam(aMsg, aActor, aParam.mInfo);
+  WriteIPDLParam(aMsg, aActor, aParam.mLoadId);
+  WriteIPDLParam(aMsg, aActor, aParam.mLoadIsFromSessionHistory);
+  WriteIPDLParam(aMsg, aActor, aParam.mRequestedIndex);
+  WriteIPDLParam(aMsg, aActor, aParam.mSessionHistoryLength);
+}
+
+bool IPDLParamTraits<dom::LoadingSessionHistoryInfo>::Read(
+    const IPC::Message* aMsg, PickleIterator* aIter, IProtocol* aActor,
+    dom::LoadingSessionHistoryInfo* aResult) {
+  if (!ReadIPDLParam(aMsg, aIter, aActor, &aResult->mInfo) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mLoadId) ||
+      !ReadIPDLParam(aMsg, aIter, aActor,
+                     &aResult->mLoadIsFromSessionHistory) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mRequestedIndex) ||
+      !ReadIPDLParam(aMsg, aIter, aActor, &aResult->mSessionHistoryLength)) {
+    aActor->FatalError("Error reading fields for LoadingSessionHistoryInfo");
+    return false;
+  }
+
+  return true;
+}
+
+void IPDLParamTraits<nsILayoutHistoryState*>::Write(
+    IPC::Message* aMsg, IProtocol* aActor, nsILayoutHistoryState* aParam) {
+  if (aParam) {
+    WriteIPDLParam(aMsg, aActor, true);
+    bool scrollPositionOnly = false;
+    nsTArray<nsCString> keys;
+    nsTArray<mozilla::PresState> states;
+    aParam->GetContents(&scrollPositionOnly, keys, states);
+    WriteIPDLParam(aMsg, aActor, scrollPositionOnly);
+    WriteIPDLParam(aMsg, aActor, keys);
+    WriteIPDLParam(aMsg, aActor, states);
+  } else {
+    WriteIPDLParam(aMsg, aActor, false);
+  }
+}
+
+bool IPDLParamTraits<nsILayoutHistoryState*>::Read(
+    const IPC::Message* aMsg, PickleIterator* aIter, IProtocol* aActor,
+    RefPtr<nsILayoutHistoryState>* aResult) {
+  bool hasLayoutHistoryState = false;
+  if (!ReadIPDLParam(aMsg, aIter, aActor, &hasLayoutHistoryState)) {
+    aActor->FatalError("Error reading fields for nsILayoutHistoryState");
+    return false;
+  }
+
+  if (hasLayoutHistoryState) {
+    bool scrollPositionOnly = false;
+    nsTArray<nsCString> keys;
+    nsTArray<mozilla::PresState> states;
+    if (!ReadIPDLParam(aMsg, aIter, aActor, &scrollPositionOnly) ||
+        !ReadIPDLParam(aMsg, aIter, aActor, &keys) ||
+        !ReadIPDLParam(aMsg, aIter, aActor, &states)) {
+      aActor->FatalError("Error reading fields for nsILayoutHistoryState");
+    }
+
+    if (keys.Length() != states.Length()) {
+      aActor->FatalError("Error reading fields for nsILayoutHistoryState");
+      return false;
+    }
+
+    *aResult = NS_NewLayoutHistoryState();
+    (*aResult)->SetScrollPositionOnly(scrollPositionOnly);
+    for (uint32_t i = 0; i < keys.Length(); ++i) {
+      PresState& state = states[i];
+      UniquePtr<PresState> newState = MakeUnique<PresState>(state);
+      (*aResult)->AddState(keys[i], std::move(newState));
+    }
+  }
+  return true;
+}
+
+}  // namespace ipc
+
+}  // namespace mozilla