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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=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/. */

#ifndef mozilla_dom_ContentChild_h

#define mozilla_dom_ContentChild_h

#include "mozilla/Atomics.h"

#include "mozilla/dom/BlobImpl.h"

#include "mozilla/dom/GetFilesHelper.h"

#include "mozilla/dom/UserActivation.h"

#include "mozilla/dom/PContentChild.h"

#include "mozilla/dom/ProcessActor.h"

#include "mozilla/dom/RemoteType.h"

#include "mozilla/Hal.h"

#include "mozilla/ipc/InputStreamUtils.h"

#include "mozilla/ipc/ProtocolUtils.h"

#include "mozilla/StaticPtr.h"

#include "mozilla/UniquePtr.h"

#include "nsClassHashtable.h"

#include "nscore.h"

#include "nsHashKeys.h"

#include "nsIDOMProcessChild.h"

#include "nsRefPtrHashtable.h"

#include "nsString.h"

#include "nsTArrayForwardDeclare.h"

#include "nsTHashSet.h"

#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)

#  include "nsIFile.h"

#endif

#if defined(MOZ_SANDBOX) && defined(MOZ_DEBUG) && defined(ENABLE_TESTS)

#  include "mozilla/PSandboxTestingChild.h"

#endif

struct ChromePackage;

class nsIObserver;

struct SubstitutionMapping;

struct OverrideMapping;

class nsIDomainPolicy;

class nsIURIClassifierCallback;

class nsDocShellLoadState;

class nsFrameLoader;

class nsIOpenWindowInfo;

namespace mozilla {

class RemoteSpellcheckEngineChild;

class ChildProfilerController;

class BenchmarkStorageChild;

namespace ipc {

class UntypedEndpoint;

namespace loader {

class PScriptCacheChild;

namespace widget {

enum class ThemeChangeKind : uint8_t;

namespace dom {

namespace ipc {

class SharedMap;

class AlertObserver;

class ConsoleListener;

class ClonedMessageData;

class BrowserChild;

class TabContext;

enum class CallerType : uint32_t;

class ContentChild final : public PContentChild,

                           public nsIDOMProcessChild,

                           public mozilla::ipc::IShmemAllocator,

                           public ProcessActor {

  using ClonedMessageData = mozilla::dom::ClonedMessageData;

  using FileDescriptor = mozilla::ipc::FileDescriptor;

  friend class PContentChild;

 public:

  NS_DECL_NSIDOMPROCESSCHILD

  ContentChild();

  virtual ~ContentChild();

  NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;

  NS_IMETHOD_(MozExternalRefCountType) AddRef(void) override { return 1; }

  NS_IMETHOD_(MozExternalRefCountType) Release(void) override { return 1; }

  struct AppInfo {

    nsCString version;

    nsCString buildID;

    nsCString name;

    nsCString UAName;

    nsCString ID;

    nsCString vendor;

    nsCString sourceURL;

    nsCString updateURL;

};

  MOZ_CAN_RUN_SCRIPT_BOUNDARY nsresult ProvideWindowCommon(

      NotNull<BrowserChild*> aTabOpener, nsIOpenWindowInfo* aOpenWindowInfo,

      uint32_t aChromeFlags, bool aCalledFromJS, nsIURI* aURI,

      const nsAString& aName, const nsACString& aFeatures,

      const UserActivation::Modifiers& aModifiers, bool aForceNoOpener,

      bool aForceNoReferrer, bool aIsPopupRequested,

      nsDocShellLoadState* aLoadState, bool* aWindowIsNew,

      BrowsingContext** aReturn);

  void Init(mozilla::ipc::UntypedEndpoint&& aEndpoint,

            const char* aParentBuildID, uint64_t aChildID, bool aIsForBrowser);

  void InitXPCOM(XPCOMInitData&& aXPCOMInit,

                 const mozilla::dom::ipc::StructuredCloneData& aInitialData,

                 bool aIsReadyForBackgroundProcessing);

  void InitSharedUASheets(Maybe<base::SharedMemoryHandle>&& aHandle,

                          uintptr_t aAddress);

  void InitGraphicsDeviceData(const ContentDeviceData& aData);

  static ContentChild* GetSingleton() { return sSingleton; }

  const AppInfo& GetAppInfo() { return mAppInfo; }

  void SetProcessName(const nsACString& aName,

                      const nsACString* aETLDplus1 = nullptr,

                      const nsACString* aCurrentProfile = nullptr);

  void GetProcessName(nsACString& aName) const;

#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)

  void GetProfileDir(nsIFile** aProfileDir) const {

    *aProfileDir = mProfileDir;

    NS_IF_ADDREF(*aProfileDir);

  void SetProfileDir(nsIFile* aProfileDir) { mProfileDir = aProfileDir; }

#endif

  bool IsAlive() const;

  bool IsShuttingDown() const;

  ipc::SharedMap* SharedData() { return mSharedData; };

  static void AppendProcessId(nsACString& aName);

  static RefPtr<GenericPromise> UpdateCookieStatus(nsIChannel* aChannel);

  mozilla::ipc::IPCResult RecvInitGMPService(

      Endpoint<PGMPServiceChild>&& aGMPService);

  mozilla::ipc::IPCResult RecvInitProfiler(

      Endpoint<PProfilerChild>&& aEndpoint);

  mozilla::ipc::IPCResult RecvGMPsChanged(

      nsTArray<GMPCapabilityData>&& capabilities);

  mozilla::ipc::IPCResult RecvInitProcessHangMonitor(

      Endpoint<PProcessHangMonitorChild>&& aHangMonitor);

  mozilla::ipc::IPCResult RecvInitRendering(

      Endpoint<PCompositorManagerChild>&& aCompositor,

      Endpoint<PImageBridgeChild>&& aImageBridge,

      Endpoint<PVRManagerChild>&& aVRBridge,

      Endpoint<PRemoteDecoderManagerChild>&& aVideoManager,

      nsTArray<uint32_t>&& namespaces);

  mozilla::ipc::IPCResult RecvReinitRendering(

      Endpoint<PCompositorManagerChild>&& aCompositor,

      Endpoint<PImageBridgeChild>&& aImageBridge,

      Endpoint<PVRManagerChild>&& aVRBridge,

      Endpoint<PRemoteDecoderManagerChild>&& aVideoManager,

      nsTArray<uint32_t>&& namespaces);

  mozilla::ipc::IPCResult RecvReinitRenderingForDeviceReset();

  mozilla::ipc::IPCResult RecvSetProcessSandbox(

      const Maybe<FileDescriptor>& aBroker);

  PHalChild* AllocPHalChild();

  bool DeallocPHalChild(PHalChild*);

  PHeapSnapshotTempFileHelperChild* AllocPHeapSnapshotTempFileHelperChild();

  bool DeallocPHeapSnapshotTempFileHelperChild(

      PHeapSnapshotTempFileHelperChild*);

  PCycleCollectWithLogsChild* AllocPCycleCollectWithLogsChild(

      const bool& aDumpAllTraces, const FileDescriptor& aGCLog,

      const FileDescriptor& aCCLog);

  bool DeallocPCycleCollectWithLogsChild(PCycleCollectWithLogsChild* aActor);

  virtual mozilla::ipc::IPCResult RecvPCycleCollectWithLogsConstructor(

      PCycleCollectWithLogsChild* aChild, const bool& aDumpAllTraces,

      const FileDescriptor& aGCLog, const FileDescriptor& aCCLog) override;

  already_AddRefed<PWebBrowserPersistDocumentChild>

  AllocPWebBrowserPersistDocumentChild(

      PBrowserChild* aBrowser, const MaybeDiscarded<BrowsingContext>& aContext);

  virtual mozilla::ipc::IPCResult RecvPWebBrowserPersistDocumentConstructor(

      PWebBrowserPersistDocumentChild* aActor, PBrowserChild* aBrowser,

      const MaybeDiscarded<BrowsingContext>& aContext) override;

  already_AddRefed<PTestShellChild> AllocPTestShellChild();

  virtual mozilla::ipc::IPCResult RecvPTestShellConstructor(

      PTestShellChild*) override;

  PScriptCacheChild* AllocPScriptCacheChild(const FileDescOrError& cacheFile,

                                            const bool& wantCacheData);

  bool DeallocPScriptCacheChild(PScriptCacheChild*);

  virtual mozilla::ipc::IPCResult RecvPScriptCacheConstructor(

      PScriptCacheChild*, const FileDescOrError& cacheFile,

      const bool& wantCacheData) override;

  PRemotePrintJobChild* AllocPRemotePrintJobChild();

  PMediaChild* AllocPMediaChild();

  bool DeallocPMediaChild(PMediaChild* aActor);

  PBenchmarkStorageChild* AllocPBenchmarkStorageChild();

  bool DeallocPBenchmarkStorageChild(PBenchmarkStorageChild* aActor);

  mozilla::ipc::IPCResult RecvNotifyEmptyHTTPCache();

  mozilla::ipc::IPCResult RecvRegisterChrome(

      nsTArray<ChromePackage>&& packages,

      nsTArray<SubstitutionMapping>&& resources,

      nsTArray<OverrideMapping>&& overrides, const nsCString& locale,

      const bool& reset);

  mozilla::ipc::IPCResult RecvRegisterChromeItem(

      const ChromeRegistryItem& item);

  mozilla::ipc::IPCResult RecvClearStyleSheetCache(

      const Maybe<RefPtr<nsIPrincipal>>& aForPrincipal,

      const Maybe<nsCString>& aBaseDomain);

  mozilla::ipc::IPCResult RecvClearImageCacheFromPrincipal(

      nsIPrincipal* aPrincipal);

  mozilla::ipc::IPCResult RecvClearImageCacheFromBaseDomain(

      const nsCString& aBaseDomain);

  mozilla::ipc::IPCResult RecvClearImageCache(const bool& privateLoader,

                                              const bool& chrome);

  PRemoteSpellcheckEngineChild* AllocPRemoteSpellcheckEngineChild();

  bool DeallocPRemoteSpellcheckEngineChild(PRemoteSpellcheckEngineChild*);

  mozilla::ipc::IPCResult RecvSetOffline(const bool& offline);

  mozilla::ipc::IPCResult RecvSetConnectivity(const bool& connectivity);

  mozilla::ipc::IPCResult RecvSetCaptivePortalState(const int32_t& state);

  mozilla::ipc::IPCResult RecvSetTRRMode(

      const nsIDNSService::ResolverMode& mode,

      const nsIDNSService::ResolverMode& modeFromPref);

  mozilla::ipc::IPCResult RecvBidiKeyboardNotify(const bool& isLangRTL,

                                                 const bool& haveBidiKeyboards);

  mozilla::ipc::IPCResult RecvNotifyVisited(nsTArray<VisitedQueryResult>&&);

  mozilla::ipc::IPCResult RecvThemeChanged(FullLookAndFeel&&,

                                           widget::ThemeChangeKind);

  // auto remove when alertfinished is received.

  nsresult AddRemoteAlertObserver(const nsString& aData,

                                  nsIObserver* aObserver);

  mozilla::ipc::IPCResult RecvPreferenceUpdate(const Pref& aPref);

  mozilla::ipc::IPCResult RecvVarUpdate(const GfxVarUpdate& pref);

  mozilla::ipc::IPCResult RecvUpdatePerfStatsCollectionMask(

      const uint64_t& aMask);

  mozilla::ipc::IPCResult RecvCollectPerfStatsJSON(

      CollectPerfStatsJSONResolver&& aResolver);

  mozilla::ipc::IPCResult RecvCollectScrollingMetrics(

      CollectScrollingMetricsResolver&& aResolver);

  mozilla::ipc::IPCResult RecvNotifyAlertsObserver(const nsCString& aType,

                                                   const nsString& aData);

  mozilla::ipc::IPCResult RecvLoadProcessScript(const nsString& aURL);

  mozilla::ipc::IPCResult RecvAsyncMessage(const nsString& aMsg,

                                           const ClonedMessageData& aData);

  mozilla::ipc::IPCResult RecvRegisterStringBundles(

      nsTArray<StringBundleDescriptor>&& stringBundles);

  mozilla::ipc::IPCResult RecvUpdateL10nFileSources(

      nsTArray<L10nFileSourceDescriptor>&& aDescriptors);

  mozilla::ipc::IPCResult RecvUpdateSharedData(

      const FileDescriptor& aMapFile, const uint32_t& aMapSize,

      nsTArray<IPCBlob>&& aBlobs, nsTArray<nsCString>&& aChangedKeys);

  mozilla::ipc::IPCResult RecvFontListChanged();

  mozilla::ipc::IPCResult RecvForceGlobalReflow(bool aNeedsReframe);

  mozilla::ipc::IPCResult RecvGeolocationUpdate(nsIDOMGeoPosition* aPosition);

  // MOZ_CAN_RUN_SCRIPT_BOUNDARY because we don't have MOZ_CAN_RUN_SCRIPT bits

  // in IPC code yet.

  MOZ_CAN_RUN_SCRIPT_BOUNDARY

  mozilla::ipc::IPCResult RecvGeolocationError(const uint16_t& errorCode);

  mozilla::ipc::IPCResult RecvUpdateDictionaryList(

      nsTArray<nsCString>&& aDictionaries);

  mozilla::ipc::IPCResult RecvUpdateFontList(SystemFontList&&);

  mozilla::ipc::IPCResult RecvRebuildFontList(const bool& aFullRebuild);

  mozilla::ipc::IPCResult RecvFontListShmBlockAdded(

      const uint32_t& aGeneration, const uint32_t& aIndex,

      base::SharedMemoryHandle&& aHandle);

  mozilla::ipc::IPCResult RecvUpdateAppLocales(

      nsTArray<nsCString>&& aAppLocales);

  mozilla::ipc::IPCResult RecvUpdateRequestedLocales(

      nsTArray<nsCString>&& aRequestedLocales);

  mozilla::ipc::IPCResult RecvSystemTimezoneChanged();

  mozilla::ipc::IPCResult RecvAddPermission(const IPC::Permission& permission);

  mozilla::ipc::IPCResult RecvRemoveAllPermissions();

  mozilla::ipc::IPCResult RecvFlushMemory(const nsString& reason);

  mozilla::ipc::IPCResult RecvActivateA11y();

  mozilla::ipc::IPCResult RecvShutdownA11y();

  mozilla::ipc::IPCResult RecvApplicationForeground();

  mozilla::ipc::IPCResult RecvApplicationBackground();

  mozilla::ipc::IPCResult RecvGarbageCollect();

  mozilla::ipc::IPCResult RecvCycleCollect();

  mozilla::ipc::IPCResult RecvUnlinkGhosts();

  mozilla::ipc::IPCResult RecvAppInfo(

      const nsCString& version, const nsCString& buildID, const nsCString& name,

      const nsCString& UAName, const nsCString& ID, const nsCString& vendor,

      const nsCString& sourceURL, const nsCString& updateURL);

  mozilla::ipc::IPCResult RecvRemoteType(const nsCString& aRemoteType,

                                         const nsCString& aProfile);

  void PreallocInit();

  // Call RemoteTypePrefix() on the result to remove URIs if you want to use

  // this for telemetry.

  const nsACString& GetRemoteType() const override;

  mozilla::ipc::IPCResult RecvInitBlobURLs(

      nsTArray<BlobURLRegistrationData>&& aRegistations);

  mozilla::ipc::IPCResult RecvInitJSActorInfos(

      nsTArray<JSProcessActorInfo>&& aContentInfos,

      nsTArray<JSWindowActorInfo>&& aWindowInfos);

  mozilla::ipc::IPCResult RecvUnregisterJSWindowActor(const nsCString& aName);

  mozilla::ipc::IPCResult RecvUnregisterJSProcessActor(const nsCString& aName);

  mozilla::ipc::IPCResult RecvLastPrivateDocShellDestroyed();

  mozilla::ipc::IPCResult RecvNotifyProcessPriorityChanged(

      const hal::ProcessPriority& aPriority);

  mozilla::ipc::IPCResult RecvMinimizeMemoryUsage();

  mozilla::ipc::IPCResult RecvLoadAndRegisterSheet(nsIURI* aURI,

                                                   const uint32_t& aType);

  mozilla::ipc::IPCResult RecvUnregisterSheet(nsIURI* aURI,

                                              const uint32_t& aType);

  void AddIdleObserver(nsIObserver* aObserver, uint32_t aIdleTimeInS);

  void RemoveIdleObserver(nsIObserver* aObserver, uint32_t aIdleTimeInS);

  mozilla::ipc::IPCResult RecvNotifyIdleObserver(const uint64_t& aObserver,

                                                 const nsCString& aTopic,

                                                 const nsString& aData);

  mozilla::ipc::IPCResult RecvUpdateWindow(const uintptr_t& aChildId);

  mozilla::ipc::IPCResult RecvDomainSetChanged(const uint32_t& aSetType,

                                               const uint32_t& aChangeType,

                                               nsIURI* aDomain);

  mozilla::ipc::IPCResult RecvShutdownConfirmedHP();

  mozilla::ipc::IPCResult RecvShutdown();

  mozilla::ipc::IPCResult RecvInvokeDragSession(

      const MaybeDiscarded<WindowContext>& aSourceWindowContext,

      const MaybeDiscarded<WindowContext>& aSourceTopWindowContext,

      nsTArray<IPCTransferableData>&& aTransferables, const uint32_t& aAction);

  mozilla::ipc::IPCResult RecvUpdateDragSession(

      nsTArray<IPCTransferableData>&& aTransferables,

      EventMessage aEventMessage);

  MOZ_CAN_RUN_SCRIPT_BOUNDARY

  mozilla::ipc::IPCResult RecvEndDragSession(

      const bool& aDoneDrag, const bool& aUserCancelled,

      const mozilla::LayoutDeviceIntPoint& aEndDragPoint,

      const uint32_t& aKeyModifiers, const uint32_t& aDropEffect);

  mozilla::ipc::IPCResult RecvPush(const nsCString& aScope,

                                   nsIPrincipal* aPrincipal,

                                   const nsString& aMessageId);

  mozilla::ipc::IPCResult RecvPushWithData(const nsCString& aScope,

                                           nsIPrincipal* aPrincipal,

                                           const nsString& aMessageId,

                                           nsTArray<uint8_t>&& aData);

  mozilla::ipc::IPCResult RecvPushSubscriptionChange(const nsCString& aScope,

                                                     nsIPrincipal* aPrincipal);

  mozilla::ipc::IPCResult RecvPushError(const nsCString& aScope,

                                        nsIPrincipal* aPrincipal,

                                        const nsString& aMessage,

                                        const uint32_t& aFlags);

  mozilla::ipc::IPCResult RecvNotifyPushSubscriptionModifiedObservers(

      const nsCString& aScope, nsIPrincipal* aPrincipal);

  mozilla::ipc::IPCResult RecvRefreshScreens(

      nsTArray<ScreenDetails>&& aScreens);

  mozilla::ipc::IPCResult RecvNetworkLinkTypeChange(const uint32_t& aType);

  uint32_t NetworkLinkType() const { return mNetworkLinkType; }

  mozilla::ipc::IPCResult RecvSocketProcessCrashed();

  // Get the directory for IndexedDB files. We query the parent for this and

  // cache the value

  nsString& GetIndexedDBPath();

  ContentParentId GetID() const { return mID; }

  bool IsForBrowser() const { return mIsForBrowser; }

  MOZ_CAN_RUN_SCRIPT_BOUNDARY mozilla::ipc::IPCResult RecvConstructBrowser(

      ManagedEndpoint<PBrowserChild>&& aBrowserEp,

      ManagedEndpoint<PWindowGlobalChild>&& aWindowEp, const TabId& aTabId,

      const IPCTabContext& aContext, const WindowGlobalInit& aWindowInit,

      const uint32_t& aChromeFlags, const ContentParentId& aCpID,

      const bool& aIsForBrowser, const bool& aIsTopLevel);

  FORWARD_SHMEM_ALLOCATOR_TO(PContentChild)

  void GetAvailableDictionaries(nsTArray<nsCString>& aDictionaries);

#ifdef MOZ_WEBRTC

  PWebrtcGlobalChild* AllocPWebrtcGlobalChild();

  bool DeallocPWebrtcGlobalChild(PWebrtcGlobalChild* aActor);

#endif

  PContentPermissionRequestChild* AllocPContentPermissionRequestChild(

      Span<const PermissionRequest> aRequests, nsIPrincipal* aPrincipal,

      nsIPrincipal* aTopLevelPrincipal, const bool& aIsHandlingUserInput,

      const bool& aMaybeUnsafePermissionDelegate, const TabId& aTabId);

  bool DeallocPContentPermissionRequestChild(

      PContentPermissionRequestChild* actor);

  // GetFiles for WebKit/Blink FileSystem API and Directory API must run on the

  // parent process.

  void CreateGetFilesRequest(const nsAString& aDirectoryPath,

                             bool aRecursiveFlag, nsID& aUUID,

                             GetFilesHelperChild* aChild);

  void DeleteGetFilesRequest(nsID& aUUID, GetFilesHelperChild* aChild);

  mozilla::ipc::IPCResult RecvGetFilesResponse(

      const nsID& aUUID, const GetFilesResponseResult& aResult);

  mozilla::ipc::IPCResult RecvBlobURLRegistration(

      const nsCString& aURI, const IPCBlob& aBlob, nsIPrincipal* aPrincipal,

      const nsCString& aPartitionKey);

  mozilla::ipc::IPCResult RecvBlobURLUnregistration(const nsCString& aURI);

  mozilla::ipc::IPCResult RecvRequestMemoryReport(

      const uint32_t& generation, const bool& anonymize,

      const bool& minimizeMemoryUsage, const Maybe<FileDescriptor>& DMDFile,

      const RequestMemoryReportResolver& aResolver);

#if defined(XP_WIN)

  mozilla::ipc::IPCResult RecvGetUntrustedModulesData(

      GetUntrustedModulesDataResolver&& aResolver);

  mozilla::ipc::IPCResult RecvUnblockUntrustedModulesThread();

#endif  // defined(XP_WIN)

  mozilla::ipc::IPCResult RecvSetXPCOMProcessAttributes(

      XPCOMInitData&& aXPCOMInit, const StructuredCloneData& aInitialData,

      FullLookAndFeel&& aLookAndFeelData, SystemFontList&& aFontList,

      Maybe<base::SharedMemoryHandle>&& aSharedUASheetHandle,

      const uintptr_t& aSharedUASheetAddress,

      nsTArray<base::SharedMemoryHandle>&& aSharedFontListBlocks,

      const bool& aIsReadyForBackgroundProcessing);

  mozilla::ipc::IPCResult RecvProvideAnonymousTemporaryFile(

      const uint64_t& aID, const FileDescOrError& aFD);

  mozilla::ipc::IPCResult RecvSetPermissionsWithKey(

      const nsCString& aPermissionKey, nsTArray<IPC::Permission>&& aPerms);

  mozilla::ipc::IPCResult RecvShareCodeCoverageMutex(

      CrossProcessMutexHandle aHandle);

  mozilla::ipc::IPCResult RecvFlushCodeCoverageCounters(

      FlushCodeCoverageCountersResolver&& aResolver);

  mozilla::ipc::IPCResult RecvSetInputEventQueueEnabled();

  mozilla::ipc::IPCResult RecvFlushInputEventQueue();

  mozilla::ipc::IPCResult RecvSuspendInputEventQueue();

  mozilla::ipc::IPCResult RecvResumeInputEventQueue();

  mozilla::ipc::IPCResult RecvAddDynamicScalars(

      nsTArray<DynamicScalarDefinition>&& aDefs);

  // Get a reference to the font list passed from the chrome process,

  // for use during gfx initialization.

  SystemFontList& SystemFontList() { return mFontList; }

  nsTArray<base::SharedMemoryHandle>& SharedFontListBlocks() {

    return mSharedFontListBlocks;

  // PURLClassifierChild

  PURLClassifierChild* AllocPURLClassifierChild(nsIPrincipal* aPrincipal,

                                                bool* aSuccess);

  bool DeallocPURLClassifierChild(PURLClassifierChild* aActor);

  // PURLClassifierLocalChild

  PURLClassifierLocalChild* AllocPURLClassifierLocalChild(

      nsIURI* aUri, Span<const IPCURLClassifierFeature> aFeatures);

  bool DeallocPURLClassifierLocalChild(PURLClassifierLocalChild* aActor);

  PSessionStorageObserverChild* AllocPSessionStorageObserverChild();

  bool DeallocPSessionStorageObserverChild(

      PSessionStorageObserverChild* aActor);

  FullLookAndFeel& BorrowLookAndFeelData() { return mLookAndFeelData; }

/**

   * Helper function for protocols that use the GPU process when available.

   * Overrides FatalError to just be a warning when communicating with the

   * GPU process since we don't want to crash the content process when the

   * GPU process crashes.

*/

  static void FatalErrorIfNotUsingGPUProcess(const char* const aErrorMsg,

                                             base::ProcessId aOtherPid);

  using AnonymousTemporaryFileCallback = std::function<void(PRFileDesc*)>;

  nsresult AsyncOpenAnonymousTemporaryFile(

      const AnonymousTemporaryFileCallback& aCallback);

  mozilla::ipc::IPCResult RecvSaveRecording(const FileDescriptor& aFile);

  mozilla::ipc::IPCResult RecvCrossProcessRedirect(

      RedirectToRealChannelArgs&& aArgs,

      nsTArray<Endpoint<extensions::PStreamFilterParent>>&& aEndpoints,

      CrossProcessRedirectResolver&& aResolve);

  mozilla::ipc::IPCResult RecvStartDelayedAutoplayMediaComponents(

      const MaybeDiscarded<BrowsingContext>& aContext);

  mozilla::ipc::IPCResult RecvUpdateMediaControlAction(

      const MaybeDiscarded<BrowsingContext>& aContext,

      const MediaControlAction& aAction);

  // See `BrowsingContext::mEpochs` for an explanation of this field.

  uint64_t GetBrowsingContextFieldEpoch() const {

    return mBrowsingContextFieldEpoch;

  uint64_t NextBrowsingContextFieldEpoch() {

    mBrowsingContextFieldEpoch++;

    return mBrowsingContextFieldEpoch;

  mozilla::ipc::IPCResult RecvOnAllowAccessFor(

      const MaybeDiscarded<BrowsingContext>& aContext,

      const nsCString& aTrackingOrigin, uint32_t aCookieBehavior,

      const ContentBlockingNotifier::StorageAccessPermissionGrantedReason&

          aReason);

  mozilla::ipc::IPCResult RecvOnContentBlockingDecision(

      const MaybeDiscarded<BrowsingContext>& aContext,

      const ContentBlockingNotifier::BlockingDecision& aDecision,

      uint32_t aRejectedReason);

#ifdef NIGHTLY_BUILD

  // Fetch the current number of pending input events.

//

  // NOTE: This method performs an atomic read, and is safe to call from all

  // threads.

  uint32_t GetPendingInputEvents() { return mPendingInputEvents; }

#endif

#if defined(MOZ_SANDBOX) && defined(MOZ_DEBUG) && defined(ENABLE_TESTS)

  mozilla::ipc::IPCResult RecvInitSandboxTesting(

      Endpoint<PSandboxTestingChild>&& aEndpoint);

#endif

 private:

  static void ForceKillTimerCallback(nsITimer* aTimer, void* aClosure);

  void StartForceKillTimer();

  void ShutdownInternal();

  mozilla::ipc::IPCResult GetResultForRenderingInitFailure(

      base::ProcessId aOtherPid);

  virtual void ActorDestroy(ActorDestroyReason why) override;

  virtual void ProcessingError(Result aCode, const char* aReason) override;

  mozilla::ipc::IPCResult RecvCreateBrowsingContext(

      uint64_t aGroupId, BrowsingContext::IPCInitializer&& aInit);

  mozilla::ipc::IPCResult RecvDiscardBrowsingContext(

      const MaybeDiscarded<BrowsingContext>& aContext, bool aDoDiscard,

      DiscardBrowsingContextResolver&& aResolve);

  mozilla::ipc::IPCResult RecvRegisterBrowsingContextGroup(

      uint64_t aGroupId, nsTArray<SyncedContextInitializer>&& aInits);

  mozilla::ipc::IPCResult RecvDestroyBrowsingContextGroup(uint64_t aGroupId);

  mozilla::ipc::IPCResult RecvWindowClose(

      const MaybeDiscarded<BrowsingContext>& aContext, bool aTrustedCaller);

  mozilla::ipc::IPCResult RecvWindowFocus(

      const MaybeDiscarded<BrowsingContext>& aContext, CallerType aCallerType,

      uint64_t aActionId);

  mozilla::ipc::IPCResult RecvWindowBlur(

      const MaybeDiscarded<BrowsingContext>& aContext, CallerType aCallerType);

  MOZ_CAN_RUN_SCRIPT_BOUNDARY mozilla::ipc::IPCResult RecvRaiseWindow(

      const MaybeDiscarded<BrowsingContext>& aContext, CallerType aCallerType,

      uint64_t aActionId);

  MOZ_CAN_RUN_SCRIPT_BOUNDARY mozilla::ipc::IPCResult RecvAdjustWindowFocus(

      const MaybeDiscarded<BrowsingContext>& aContext, bool aIsVisible,

      uint64_t aActionId, bool aShouldClearFocus,

      const MaybeDiscarded<BrowsingContext>& aAncestorBrowsingContextToFocus);

  MOZ_CAN_RUN_SCRIPT_BOUNDARY mozilla::ipc::IPCResult RecvClearFocus(

      const MaybeDiscarded<BrowsingContext>& aContext);

  mozilla::ipc::IPCResult RecvSetFocusedBrowsingContext(

      const MaybeDiscarded<BrowsingContext>& aContext, uint64_t aActionId);

  mozilla::ipc::IPCResult RecvSetActiveBrowsingContext(

      const MaybeDiscarded<BrowsingContext>& aContext, uint64_t aActionId);

  mozilla::ipc::IPCResult RecvAbortOrientationPendingPromises(

      const MaybeDiscarded<BrowsingContext>& aContext);

  mozilla::ipc::IPCResult RecvUnsetActiveBrowsingContext(

      const MaybeDiscarded<BrowsingContext>& aContext, uint64_t aActionId);

  mozilla::ipc::IPCResult RecvSetFocusedElement(

      const MaybeDiscarded<BrowsingContext>& aContext, bool aNeedsFocus);

  mozilla::ipc::IPCResult RecvFinalizeFocusOuter(

      const MaybeDiscarded<BrowsingContext>& aContext, bool aCanFocus,

      CallerType aCallerType);

  MOZ_CAN_RUN_SCRIPT_BOUNDARY mozilla::ipc::IPCResult RecvBlurToChild(

      const MaybeDiscarded<BrowsingContext>& aFocusedBrowsingContext,

      const MaybeDiscarded<BrowsingContext>& aBrowsingContextToClear,

      const MaybeDiscarded<BrowsingContext>& aAncestorBrowsingContextToFocus,

      bool aIsLeavingDocument, bool aAdjustWidget, uint64_t aActionId);

  mozilla::ipc::IPCResult RecvSetupFocusedAndActive(

      const MaybeDiscarded<BrowsingContext>& aFocusedBrowsingContext,

      uint64_t aActionIdForFocused,

      const MaybeDiscarded<BrowsingContext>& aActiveBrowsingContext,

      uint64_t aActionIdForActive);

  mozilla::ipc::IPCResult RecvReviseActiveBrowsingContext(

      uint64_t aOldActionId,

      const MaybeDiscarded<BrowsingContext>& aActiveBrowsingContext,

      uint64_t aNewActionId);

  mozilla::ipc::IPCResult RecvReviseFocusedBrowsingContext(

      uint64_t aOldActionId,

      const MaybeDiscarded<BrowsingContext>& aFocusedBrowsingContext,

      uint64_t aNewActionId);

  mozilla::ipc::IPCResult RecvMaybeExitFullscreen(

      const MaybeDiscarded<BrowsingContext>& aContext);

  mozilla::ipc::IPCResult RecvWindowPostMessage(

      const MaybeDiscarded<BrowsingContext>& aContext,

      const ClonedOrErrorMessageData& aMessage, const PostMessageData& aData);

  mozilla::ipc::IPCResult RecvCommitBrowsingContextTransaction(

      const MaybeDiscarded<BrowsingContext>& aContext,

      BrowsingContext::BaseTransaction&& aTransaction, uint64_t aEpoch);

  mozilla::ipc::IPCResult RecvCommitWindowContextTransaction(

      const MaybeDiscarded<WindowContext>& aContext,

      WindowContext::BaseTransaction&& aTransaction, uint64_t aEpoch);

  mozilla::ipc::IPCResult RecvCreateWindowContext(

      WindowContext::IPCInitializer&& aInit);

  mozilla::ipc::IPCResult RecvDiscardWindowContext(

      uint64_t aContextId, DiscardWindowContextResolver&& aResolve);

  mozilla::ipc::IPCResult RecvScriptError(

      const nsString& aMessage, const nsString& aSourceName,

      const nsString& aSourceLine, const uint32_t& aLineNumber,

      const uint32_t& aColNumber, const uint32_t& aFlags,

      const nsCString& aCategory, const bool& aFromPrivateWindow,

      const uint64_t& aInnerWindowId, const bool& aFromChromeContext);

  mozilla::ipc::IPCResult RecvReportFrameTimingData(

      const LoadInfoArgs& loadInfoArgs, const nsString& entryName,

      const nsString& initiatorType, UniquePtr<PerformanceTimingData>&& aData);

  mozilla::ipc::IPCResult RecvLoadURI(

      const MaybeDiscarded<BrowsingContext>& aContext,

      nsDocShellLoadState* aLoadState, bool aSetNavigating,

      LoadURIResolver&& aResolve);

  mozilla::ipc::IPCResult RecvInternalLoad(nsDocShellLoadState* aLoadState);

  mozilla::ipc::IPCResult RecvDisplayLoadError(

      const MaybeDiscarded<BrowsingContext>& aContext, const nsAString& aURI);

  mozilla::ipc::IPCResult RecvGoBack(

      const MaybeDiscarded<BrowsingContext>& aContext,

      const Maybe<int32_t>& aCancelContentJSEpoch, bool aRequireUserInteraction,

      bool aUserActivation);

  mozilla::ipc::IPCResult RecvGoForward(

      const MaybeDiscarded<BrowsingContext>& aContext,

      const Maybe<int32_t>& aCancelContentJSEpoch, bool aRequireUserInteraction,

      bool aUserActivation);

  mozilla::ipc::IPCResult RecvGoToIndex(

      const MaybeDiscarded<BrowsingContext>& aContext, const int32_t& aIndex,

      const Maybe<int32_t>& aCancelContentJSEpoch, bool aUserActivation);

  mozilla::ipc::IPCResult RecvReload(

      const MaybeDiscarded<BrowsingContext>& aContext,

      const uint32_t aReloadFlags);

  mozilla::ipc::IPCResult RecvStopLoad(

      const MaybeDiscarded<BrowsingContext>& aContext,

      const uint32_t aStopFlags);

  mozilla::ipc::IPCResult RecvRawMessage(

      const JSActorMessageMeta& aMeta, const Maybe<ClonedMessageData>& aData,

      const Maybe<ClonedMessageData>& aStack);

  already_AddRefed<JSActor> InitJSActor(JS::Handle<JSObject*> aMaybeActor,

                                        const nsACString& aName,

                                        ErrorResult& aRv) override;

  mozilla::ipc::IProtocol* AsNativeActor() override { return this; }

  mozilla::ipc::IPCResult RecvHistoryCommitIndexAndLength(

      const MaybeDiscarded<BrowsingContext>& aContext, const uint32_t& aIndex,

      const uint32_t& aLength, const nsID& aChangeID);

  mozilla::ipc::IPCResult RecvGetLayoutHistoryState(

      const MaybeDiscarded<BrowsingContext>& aContext,

      GetLayoutHistoryStateResolver&& aResolver);

  mozilla::ipc::IPCResult RecvDispatchLocationChangeEvent(

      const MaybeDiscarded<BrowsingContext>& aContext);

  mozilla::ipc::IPCResult RecvDispatchBeforeUnloadToSubtree(

      const MaybeDiscarded<BrowsingContext>& aStartingAt,

      DispatchBeforeUnloadToSubtreeResolver&& aResolver);

  mozilla::ipc::IPCResult RecvDecoderSupportedMimeTypes(

      nsTArray<nsCString>&& aSupportedTypes);

  mozilla::ipc::IPCResult RecvInitNextGenLocalStorageEnabled(

      const bool& aEnabled);

 public:

  static void DispatchBeforeUnloadToSubtree(

      BrowsingContext* aStartingAt,

      const DispatchBeforeUnloadToSubtreeResolver& aResolver);

  hal::ProcessPriority GetProcessPriority() const { return mProcessPriority; }

  hal::PerformanceHintSession* PerformanceHintSession() const {

    return mPerformanceHintSession.get();

  // Returns the target work duration for the PerformanceHintSession, based on

  // the refresh interval. Estimate that we want the tick to complete in at most

  // half of the refresh period. This is fairly arbitrary and can be tweaked

  // later.

  static TimeDuration GetPerformanceHintTarget(TimeDuration aRefreshInterval) {

    return aRefreshInterval / int64_t(2);

 private:

  void AddProfileToProcessName(const nsACString& aProfile);

  mozilla::ipc::IPCResult RecvFlushFOGData(FlushFOGDataResolver&& aResolver);

  mozilla::ipc::IPCResult RecvUpdateMediaCodecsSupported(

      RemoteDecodeIn aLocation, const media::MediaCodecsSupported& aSupported);

#ifdef NIGHTLY_BUILD

  virtual void OnChannelReceivedMessage(const Message& aMsg) override;

  virtual PContentChild::Result OnMessageReceived(const Message& aMsg) override;

  virtual PContentChild::Result OnMessageReceived(

      const Message& aMsg, UniquePtr<Message>& aReply) override;

#endif

  void ConfigureThreadPerformanceHints(const hal::ProcessPriority& aPriority);

  nsTArray<mozilla::UniquePtr<AlertObserver>> mAlertObservers;

  RefPtr<ConsoleListener> mConsoleListener;

  nsTHashSet<nsIObserver*> mIdleObservers;

  nsTArray<nsCString> mAvailableDictionaries;

  // Temporary storage for a list of available fonts, passed from the

  // parent process and used to initialize gfx in the child. Currently used

  // only on MacOSX and Linux.

  dom::SystemFontList mFontList;

  // Temporary storage for look and feel data.

  FullLookAndFeel mLookAndFeelData;

  // Temporary storage for list of shared-fontlist memory blocks.

  nsTArray<base::SharedMemoryHandle> mSharedFontListBlocks;

/**

   * An ID unique to the process containing our corresponding

   * content parent.

   * We expect our content parent to set this ID immediately after opening a

   * channel to us.

*/

  ContentParentId mID;

  AppInfo mAppInfo;

  bool mIsForBrowser;

  nsCString mRemoteType = NOT_REMOTE_TYPE;

  bool mIsAlive;

  nsCString mProcessName;

  static ContentChild* sSingleton;

  class ShutdownCanary;

  static StaticAutoPtr<ShutdownCanary> sShutdownCanary;

  nsCOMPtr<nsIDomainPolicy> mPolicy;

  nsCOMPtr<nsITimer> mForceKillTimer;

  RefPtr<ipc::SharedMap> mSharedData;

  RefPtr<ChildProfilerController> mProfilerController;

#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)

  nsCOMPtr<nsIFile> mProfileDir;

#endif

  // Hashtable to keep track of the pending GetFilesHelper objects.

  // This GetFilesHelperChild objects are removed when RecvGetFilesResponse is

  // received.

  nsRefPtrHashtable<nsIDHashKey, GetFilesHelperChild> mGetFilesPendingRequests;

  nsClassHashtable<nsUint64HashKey, AnonymousTemporaryFileCallback>

      mPendingAnonymousTemporaryFiles;

  mozilla::Atomic<bool> mShuttingDown;

#ifdef NIGHTLY_BUILD

  // NOTE: This member is atomic because it can be accessed from

  // off-main-thread.

  mozilla::Atomic<uint32_t> mPendingInputEvents;

#endif

  uint32_t mNetworkLinkType = 0;

  // See `BrowsingContext::mEpochs` for an explanation of this field.

  uint64_t mBrowsingContextFieldEpoch = 0;

  hal::ProcessPriority mProcessPriority = hal::PROCESS_PRIORITY_UNKNOWN;

  // Session created when the process priority is FOREGROUND to ensure high

  // priority scheduling of important threads. (Currently main thread and style

  // threads.) The work duration is reported by the RefreshDriverTimer.

  UniquePtr<hal::PerformanceHintSession> mPerformanceHintSession;

};

inline nsISupports* ToSupports(mozilla::dom::ContentChild* aContentChild) {

  return static_cast<nsIDOMProcessChild*>(aContentChild);

}  // namespace dom

}  // namespace mozilla

#endif  // mozilla_dom_ContentChild_h