gecko/dom/ipc/PContent.ipdl

/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 8 -*- */
/* vim: set sw=4 ts=8 et tw=80 ft=cpp : */
/* 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 protocol PAsmJSCacheEntry;
include protocol PBackground;
include protocol PBlob;
include protocol PBluetooth;
include protocol PBrowser;
include protocol PCellBroadcast;
include protocol PCompositor;
include protocol PContentBridge;
include protocol PCycleCollectWithLogs;
include protocol PCrashReporter;
include protocol PDocAccessible;
include protocol PExternalHelperApp;
include protocol PDeviceStorageRequest;
include protocol PFileDescriptorSet;
include protocol PFMRadio;
include protocol PFileSystemRequest;
include protocol PHal;
include protocol PImageBridge;
include protocol PMemoryReportRequest;
include protocol PMobileConnection;
include protocol PNecko;
include protocol PPluginModule;
include protocol PPrinting;
include protocol POfflineCacheUpdate;
include protocol PScreenManager;
include protocol PSharedBufferManager;
include protocol PSms;
include protocol PSpeechSynthesis;
include protocol PStorage;
include protocol PTelephony;
include protocol PTestShell;
include protocol PVoicemail;
include protocol PJavaScript;
include protocol PRemoteSpellcheckEngine;
include DOMTypes;
include JavaScriptTypes;
include InputStreamParams;
include PTabContext;
include URIParams;
include PluginTypes;
include ProtocolTypes;

// Workaround to prevent error if PContentChild.cpp & PContentBridgeParent.cpp
// are put into different UnifiedProtocolsXX.cpp files.
// XXX Remove this once bug 1069073 is fixed
include "mozilla/dom/PContentBridgeParent.h";

include "mozilla/dom/indexedDB/SerializationHelpers.h";

using GeoPosition from "nsGeoPositionIPCSerialiser.h";

using struct ChromePackage from "mozilla/chrome/RegistryMessageUtils.h";
using struct ResourceMapping from "mozilla/chrome/RegistryMessageUtils.h";
using struct OverrideMapping from "mozilla/chrome/RegistryMessageUtils.h";
using base::ChildPrivileges from "base/process_util.h";
using struct IPC::Permission from "mozilla/net/NeckoMessageUtils.h";
using class IPC::Principal from "mozilla/dom/PermissionMessageUtils.h";
using struct mozilla::null_t from "ipc/IPCMessageUtils.h";
using struct mozilla::void_t from "ipc/IPCMessageUtils.h";
using mozilla::dom::asmjscache::OpenMode from "mozilla/dom/asmjscache/AsmJSCache.h";
using mozilla::dom::asmjscache::WriteParams from "mozilla/dom/asmjscache/AsmJSCache.h";
using mozilla::dom::AudioChannel from "mozilla/dom/AudioChannelBinding.h";
using mozilla::dom::AudioChannelState from "AudioChannelCommon.h";
using mozilla::dom::NativeThreadId from "mozilla/dom/TabMessageUtils.h";
using mozilla::dom::quota::PersistenceType from "mozilla/dom/quota/PersistenceType.h";
using mozilla::hal::ProcessPriority from "mozilla/HalTypes.h";
using gfxIntSize from "nsSize.h";
using mozilla::dom::TabId from "mozilla/dom/ipc/IdType.h";
using mozilla::dom::ContentParentId from "mozilla/dom/ipc/IdType.h";

union ChromeRegistryItem
{
    ChromePackage;
    OverrideMapping;
    ResourceMapping;
};

namespace mozilla {
namespace dom {

struct FontListEntry {
    nsString  familyName;
    nsString  faceName;
    nsCString filepath;
    uint16_t  weight;
    int16_t   stretch;
    uint8_t   italic;
    uint8_t   index;
    bool      isHidden;
};

struct DeviceStorageFreeSpaceParams
{
  nsString type;
  nsString storageName;
};

struct DeviceStorageUsedSpaceParams
{
  nsString type;
  nsString storageName;
};

struct DeviceStorageAvailableParams
{
  nsString type;
  nsString storageName;
};

struct DeviceStorageStatusParams
{
  nsString type;
  nsString storageName;
};

struct DeviceStorageFormatParams
{
  nsString type;
  nsString storageName;
};

struct DeviceStorageMountParams
{
  nsString type;
  nsString storageName;
};

struct DeviceStorageUnmountParams
{
  nsString type;
  nsString storageName;
};

struct DeviceStorageAddParams
{
  nsString type;
  nsString storageName;
  nsString relpath;
  PBlob blob;
};

struct DeviceStorageAppendParams
{
  nsString type;
  nsString storageName;
  nsString relpath;
  PBlob blob;
};

struct DeviceStorageCreateFdParams
{
  nsString type;
  nsString storageName;
  nsString relpath;
};

struct DeviceStorageGetParams
{
  nsString type;
  nsString storageName;
  nsString rootDir;
  nsString relpath;
};

struct DeviceStorageDeleteParams
{
  nsString type;
  nsString storageName;
  nsString relpath;
};

struct DeviceStorageEnumerationParams
{
  nsString type;
  nsString storageName;
  nsString rootdir;
  uint64_t since;
};

union DeviceStorageParams
{
  DeviceStorageAddParams;
  DeviceStorageAppendParams;
  DeviceStorageCreateFdParams;
  DeviceStorageGetParams;
  DeviceStorageDeleteParams;
  DeviceStorageEnumerationParams;
  DeviceStorageFreeSpaceParams;
  DeviceStorageUsedSpaceParams;
  DeviceStorageAvailableParams;
  DeviceStorageStatusParams;
  DeviceStorageFormatParams;
  DeviceStorageMountParams;
  DeviceStorageUnmountParams;
};

struct FMRadioRequestEnableParams
{
  double frequency;
};

struct FMRadioRequestDisableParams
{

};

struct FMRadioRequestSetFrequencyParams
{
  double frequency;
};

struct FMRadioRequestSeekParams
{
  bool upward;
};

struct FMRadioRequestCancelSeekParams
{

};

union FMRadioRequestParams
{
  FMRadioRequestEnableParams;
  FMRadioRequestDisableParams;
  FMRadioRequestSetFrequencyParams;
  FMRadioRequestSeekParams;
  FMRadioRequestCancelSeekParams;
};

struct FileSystemCreateDirectoryParams
{
  nsString filesystem;
  nsString realPath;
};

union FileSystemFileDataValue
{
  uint8_t[];
  PBlob;
};

struct FileSystemCreateFileParams
{
  nsString filesystem;
  nsString realPath;
  FileSystemFileDataValue data;
  bool replace;
};

struct FileSystemGetFileOrDirectoryParams
{
  nsString filesystem;
  nsString realPath;
};

union FileSystemPathOrFileValue
{
  nsString;
  PBlob;
};

struct FileSystemRemoveParams
{
  nsString filesystem;
  nsString directory;
  FileSystemPathOrFileValue target;
  bool recursive;
};

union FileSystemParams
{
  FileSystemCreateDirectoryParams;
  FileSystemCreateFileParams;
  FileSystemGetFileOrDirectoryParams;
  FileSystemRemoveParams;
};

union PrefValue {
  nsCString;
  int32_t;
  bool;
};

union MaybePrefValue {
  PrefValue;
  null_t;
};

struct PrefSetting {
  nsCString name;
  MaybePrefValue defaultValue;
  MaybePrefValue userValue;
};

struct DataStoreSetting {
  nsString name;
  nsString originURL;
  nsString manifestURL;
  bool readOnly;
  bool enabled;
};

// Note: Any changes to this structure should also be changed in
// FileSystemUpdate below.
struct VolumeInfo {
  nsString name;
  nsString mountPoint;
  int32_t volState;
  int32_t mountGeneration;
  bool isMediaPresent;
  bool isSharing;
  bool isFormatting;
  bool isFake;
  bool isUnmounting;
};

struct ClipboardCapabilities {
  bool supportsSelectionClipboard;
  bool supportsFindClipboard;
};

union MaybeFileDesc {
    FileDescriptor;
    void_t;
};

union OptionalContentId
{
  ContentParentId;
  void_t;
};

prio(normal upto urgent) intr protocol PContent
{
    parent spawns PPluginModule;

    parent opens PCompositor;
    parent opens PSharedBufferManager;
    parent opens PImageBridge;
    child opens PBackground;

    manages PAsmJSCacheEntry;
    manages PBlob;
    manages PBluetooth;
    manages PBrowser;
    manages PCellBroadcast;
    manages PCrashReporter;
    manages PCycleCollectWithLogs;
    manages PDocAccessible;
    manages PDeviceStorageRequest;
    manages PFileSystemRequest;
    manages PExternalHelperApp;
    manages PFileDescriptorSet;
    manages PFMRadio;
    manages PHal;
    manages PMemoryReportRequest;
    manages PMobileConnection;
    manages PNecko;
    manages POfflineCacheUpdate;
    manages PPrinting;
    manages PScreenManager;
    manages PSms;
    manages PSpeechSynthesis;
    manages PStorage;
    manages PTelephony;
    manages PTestShell;
    manages PVoicemail;
    manages PJavaScript;
    manages PRemoteSpellcheckEngine;

both:
    // Depending on exactly how the new browser is being created, it might be
    // created from either the child or parent process!
    //
    // The child creates the PBrowser as part of
    // TabChild::BrowserFrameProvideWindow (which happens when the child's
    // content calls window.open()), and the parent creates the PBrowser as part
    // of ContentParent::CreateBrowserOrApp.
    //
    // When the parent constructs a PBrowser, the child trusts the app token it
    // receives from the parent.  In that case, context can be any of the
    // IPCTabContext subtypes.
    //
    // When the child constructs a PBrowser, the parent doesn't trust the app
    // token it receives from the child.  In this case, context must have type
    // PopupIPCTabContext.  The browser created using a PopupIPCTabContext has
    // the opener PBrowser's app-id and containing-app-id.  The parent checks
    // that if the opener is a browser element, the context is also for a
    // browser element.
    //
    // This allows the parent to prevent a malicious child from escalating its
    // privileges by requesting a PBrowser corresponding to a highly-privileged
    // app; the child can only request privileges for an app which the child has
    // access to (in the form of a TabChild).
    //
    // Keep the last 3 attributes in sync with GetProcessAttributes!
    async PBrowser(TabId tabId, IPCTabContext context, uint32_t chromeFlags,
                   ContentParentId cpId, bool isForApp, bool isForBrowser);

    async PBlob(BlobConstructorParams params);

    PFileDescriptorSet(FileDescriptor fd);

child:
    /**
     * Enable system-level sandboxing features, if available.  Can
     * usually only be performed zero or one times.  The child may
     * abnormally exit if this fails; the details are OS-specific.
     */
    async SetProcessSandbox();

    PMemoryReportRequest(uint32_t generation, bool anonymize,
                         bool minimizeMemoryUsage, MaybeFileDesc DMDFile);

    /**
     * Notify the AudioChannelService in the child processes.
     */
    async AudioChannelNotify();

    async SpeakerManagerNotify();

    async DataStoreNotify(uint32_t aAppId, nsString aName,
                          nsString aManifestURL);

    /**
     * Dump this process's GC and CC logs to the provided files.
     *
     * For documentation on the other args, see dumpGCAndCCLogsToFile in
     * nsIMemoryInfoDumper.idl
     */
    PCycleCollectWithLogs(bool dumpAllTraces,
                          FileDescriptor gcLog,
                          FileDescriptor ccLog);

    PTestShell();

    RegisterChrome(ChromePackage[] packages, ResourceMapping[] resources,
                   OverrideMapping[] overrides, nsCString locale, bool reset);
    RegisterChromeItem(ChromeRegistryItem item);

    async SetOffline(bool offline);

    async NotifyVisited(URIParams uri);

    async SystemMemoryAvailable(uint64_t getterId, uint32_t memoryAvailable);

    PreferenceUpdate(PrefSetting pref);

    NotifyAlertsObserver(nsCString topic, nsString data);

    GeolocationUpdate(GeoPosition somewhere);

    GeolocationError(uint16_t errorCode);

    UpdateDictionaryList(nsString[] dictionaries);

    // nsIPermissionManager messages
    AddPermission(Permission permission);

    ScreenSizeChanged(gfxIntSize size);

    FlushMemory(nsString reason);

    GarbageCollect();
    CycleCollect();

    /**
     * Start accessibility engine in content process.
     */
    ActivateA11y();

    AppInfo(nsCString version, nsCString buildID, nsCString name, nsCString UAName,
            nsCString ID, nsCString vendor);

    // Notify child that last-pb-context-exited notification was observed
    LastPrivateDocShellDestroyed();

    FilePathUpdate(nsString storageType, nsString storageName, nsString filepath,
                   nsCString reasons);

    // Note: Any changes to this structure should also be changed in
    // VolumeInfo above.
    FileSystemUpdate(nsString fsName, nsString mountPoint, int32_t fsState,
                     int32_t mountGeneration, bool isMediaPresent,
                     bool isSharing, bool isFormatting, bool isFake, bool isUnmounting);

    // Ask the Nuwa process to create a new child process.
    NuwaFork();

    NotifyProcessPriorityChanged(ProcessPriority priority);
    MinimizeMemoryUsage();

    /**
     * Used to manage nsIStyleSheetService across processes.
     */
    async LoadAndRegisterSheet(URIParams uri, uint32_t type);
    async UnregisterSheet(URIParams uri, uint32_t type);

    NotifyPhoneStateChange(nsString newState);

    /**
     * Notify idle observers in the child
     */
    NotifyIdleObserver(uint64_t observerId, nsCString topic, nsString str);

    /**
     * Notify windows in the child to apply a new app style.
     */
    OnAppThemeChanged();

    /**
     * Control the Gecko Profiler in the child process.
     */
    async StartProfiler(uint32_t aEntries, double aInterval, nsCString[] aFeatures,
                        nsCString[] aThreadNameFilters);
    async StopProfiler();
    intr GetProfile()
      returns (nsCString aProfile);

    NuwaFreeze();
parent:
    /**
     * Tell the parent process a new accessible document has been created.
     * aParentDoc is the accessible document it was created in if any, and
     * aParentAcc is the id of the accessible in that document the new document
     * is a child of.
     */
    PDocAccessible(nullable PDocAccessible aParentDoc, uint64_t aParentAcc);

    /**
     * Tell the content process some attributes of itself.  This is
     * among the first information queried by content processes after
     * startup.  (The message is sync to allow the content process to
     * control when it receives the information.)
     *
     * |id| is a unique ID among all subprocesses.  When |isForApp &&
     * isForBrowser|, we're loading <browser> for an app.  When
     * |isForBrowser|, we're loading <browser>.  When |!isForApp &&
     * !isForBrowser|, we're probably loading <xul:browser remote>.
     *
     * Keep the return values in sync with PBrowser()!
     */
    sync GetProcessAttributes()
        returns (ContentParentId cpId, bool isForApp, bool isForBrowser);
    sync GetXPCOMProcessAttributes()
        returns (bool isOffline, nsString[] dictionaries,
                 ClipboardCapabilities clipboardCaps);

    sync CreateChildProcess(IPCTabContext context,
                            ProcessPriority priority,
                            TabId openerTabId)
        returns (ContentParentId cpId, bool isForApp, bool isForBrowser, TabId tabId);
    intr BridgeToChildProcess(ContentParentId cpId);

    /**
     * This call connects the content process to a plugin process. While this
     * call runs, a new PluginModuleParent will be created in the ContentChild
     * via bridging. The corresponding PluginModuleChild will live in the plugin
     * process. We use intr semantics here to ensure that the PluginModuleParent
     * allocation message is dispatched before LoadPlugin returns.
     */
    intr LoadPlugin(uint32_t pluginId);

    /**
     * This call returns the set of plugins loaded in the chrome
     * process. However, in many cases this set will not have changed since the
     * last FindPlugins message. Consequently, the chrome process increments an
     * epoch number every time the set of plugins changes. The content process
     * sends up the last epoch it observed. If the epochs are the same, the
     * chrome process returns no plugins. Otherwise it returns a complete list.
     *
     * |pluginEpoch| is the epoch last observed by the content
     * process. |newPluginEpoch| is the current epoch in the chrome process. If
     * |pluginEpoch == newPluginEpoch|, then |plugins| will be left empty.
     */
    sync FindPlugins(uint32_t pluginEpoch) returns (PluginTag[] plugins, uint32_t newPluginEpoch);

    async PJavaScript();

    sync PRemoteSpellcheckEngine();
    PDeviceStorageRequest(DeviceStorageParams params);

    PFileSystemRequest(FileSystemParams params);

    sync PCrashReporter(NativeThreadId tid, uint32_t processType);

    sync GetRandomValues(uint32_t length)
        returns (uint8_t[] randomValues);

    async GetSystemMemory(uint64_t getterId);

    sync IsSecureURI(uint32_t type, URIParams uri, uint32_t flags)
        returns (bool isSecureURI);

    PHal();

    PMobileConnection(uint32_t clientId);

    PNecko();

    PPrinting();

    prio(high) sync PScreenManager()
        returns (uint32_t numberOfScreens,
                 float systemDefaultScale,
                 bool success);

    PCellBroadcast();

    PSms();

    PSpeechSynthesis();

    PStorage();

    PTelephony();

    PVoicemail();

    PBluetooth();

    PFMRadio();

    PAsmJSCacheEntry(OpenMode openMode, WriteParams write, Principal principal);

    // Services remoting

    async StartVisitedQuery(URIParams uri);
    async VisitURI(URIParams uri, OptionalURIParams referrer, uint32_t flags);
    async SetURITitle(URIParams uri, nsString title);

    async LoadURIExternal(URIParams uri);

    // PrefService message
    sync ReadPrefsArray() returns (PrefSetting[] prefs);

    sync ReadFontList() returns (FontListEntry[] retValue);

    sync SyncMessage(nsString aMessage, ClonedMessageData aData,
                     CpowEntry[] aCpows, Principal aPrincipal)
      returns (nsString[] retval);

    prio(high) sync RpcMessage(nsString aMessage, ClonedMessageData aData,
                               CpowEntry[] aCpows, Principal aPrincipal)
      returns (nsString[] retval);

    ShowAlertNotification(nsString imageUrl,
                          nsString title,
                          nsString text,
                          bool textClickable,
                          nsString cookie,
                          nsString name,
                          nsString bidi,
                          nsString lang,
                          nsString data,
                          Principal principal,
                          bool inPrivateBrowsing);

    CloseAlert(nsString name, Principal principal);

    PExternalHelperApp(OptionalURIParams uri,
                       nsCString aMimeContentType,
                       nsCString aContentDisposition,
                       uint32_t aContentDispositionHint,
                       nsString aContentDispositionFilename,
                       bool aForceSave,
                       int64_t aContentLength,
                       OptionalURIParams aReferrer,
                       nullable PBrowser aBrowser);

    AddGeolocationListener(Principal principal, bool highAccuracy);
    RemoveGeolocationListener();
    SetGeolocationHigherAccuracy(bool enable);

    ConsoleMessage(nsString message);
    ScriptError(nsString message, nsString sourceName, nsString sourceLine,
                uint32_t lineNumber, uint32_t colNumber, uint32_t flags,
                nsCString category);

    // nsIPermissionManager messages
    sync ReadPermissions() returns (Permission[] permissions);

    SetClipboardText(nsString text, bool isPrivateData, int32_t whichClipboard);
    sync GetClipboardText(int32_t whichClipboard)
        returns (nsString text);
    EmptyClipboard(int32_t whichClipboard);
    sync ClipboardHasText(int32_t whichClipboard)
        returns (bool hasText);

    sync GetSystemColors(uint32_t colorsCount)
        returns (uint32_t[] colors);

    sync GetIconForExtension(nsCString aFileExt, uint32_t aIconSize)
        returns (uint8_t[] bits);

    sync GetShowPasswordSetting()
        returns (bool showPassword);

    // Notify the parent of the presence or absence of private docshells
    PrivateDocShellsExist(bool aExist);

    // Tell the parent that the child has gone idle for the first time
    async FirstIdle();

    // Get Muted from the main AudioChannelService.
    sync AudioChannelGetState(AudioChannel aChannel, bool aElementHidden,
                              bool aElementWasHidden)
        returns (AudioChannelState value);

    sync AudioChannelRegisterType(AudioChannel aChannel, bool aWithVideo);
    sync AudioChannelUnregisterType(AudioChannel aChannel,
                                    bool aElementHidden,
                                    bool aWithVideo);

    async AudioChannelChangedNotification();
    async AudioChannelChangeDefVolChannel(int32_t aChannel, bool aHidden);

    sync DataStoreGetStores(nsString aName, nsString aOwner, Principal aPrincipal)
        returns (DataStoreSetting[] dataStores);

    async FilePathUpdateNotify(nsString aType,
                               nsString aStorageName,
                               nsString aFilepath,
                               nsCString aReason);

    sync GetVolumes() returns (VolumeInfo[] volumes);

    // Notify the parent that the child has finished handling a system message.
    async SystemMessageHandled();

    NuwaReady();
    // Sent when nuwa finished its initialization process and is waiting for
    // parent's signal to make it freeze.
    NuwaWaitForFreeze();

    sync AddNewProcess(uint32_t pid, ProtocolFdMapping[] aFds);

    // called by the child (test code only) to propagate volume changes to the parent
    async CreateFakeVolume(nsString fsName, nsString mountPoint);
    async SetFakeVolumeState(nsString fsName, int32_t fsState);

    sync KeywordToURI(nsCString keyword)
        returns (nsString providerName, OptionalInputStreamParams postData, OptionalURIParams uri);

    sync NotifyKeywordSearchLoading(nsString providerName, nsString keyword);

    // Tell the compositor to allocate a layer tree id for nested remote mozbrowsers.
    sync AllocateLayerTreeId()
        returns (uint64_t id);
    async DeallocateLayerTreeId(uint64_t id);

    sync SpeakerManagerForceSpeaker(bool aEnable);

    sync SpeakerManagerGetSpeakerStatus()
        returns (bool value);

    /**
     * Notifies the parent about a recording device is starting or shutdown.
     * @param recordingStatus starting or shutdown
     * @param pageURL URL that request that changing the recording status
     * @param isAudio recording start with microphone
     * @param isVideo recording start with camera
     */
    async RecordingDeviceEvents(nsString recordingStatus,
                                nsString pageURL,
                                bool isAudio,
                                bool isVideo);

    sync GetGraphicsFeatureStatus(int32_t aFeature) returns (int32_t aStatus, bool aSuccess);

    AddIdleObserver(uint64_t observerId, uint32_t idleTimeInS);
    RemoveIdleObserver(uint64_t observerId, uint32_t idleTimeInS);

    /**
     * This message is only used on X11 platforms.
     *
     * Send a dup of the plugin process's X socket to the parent
     * process.  In theory, this scheme keeps the plugin's X resources
     * around until after both the plugin process shuts down *and* the
     * parent process closes the dup fd.  This is used to prevent the
     * parent process from crashing on X errors if, e.g., the plugin
     * crashes *just before* a repaint and the parent process tries to
     * use the newly-invalid surface.
     */
    BackUpXResources(FileDescriptor aXSocketFd);

    sync OpenAnonymousTemporaryFile() returns (FileDescriptor aFD);

    /**
     * Keygen requires us to call it after a <keygen> element is parsed and
     * before one is submitted. This is urgent because an extension might use
     * a CPOW to synchronously submit a keygen element.
     */
    prio(urgent) sync FormProcessValue(nsString oldValue,
                                       nsString challenge,
                                       nsString keytype,
                                       nsString keyparams)
        returns (nsString newValue);

    /**
     * Called to provide the options for <keygen> elements.
     */
    sync FormProvideContent() returns (nsString aAttribute, nsString[] aContent);

    // Use only for testing!
    sync GetFileReferences(PersistenceType persistenceType,
                           nsCString origin,
                           nsString databaseName,
                           int64_t fileId)
      returns (int32_t refCnt, int32_t dBRefCnt, int32_t sliceRefCnt,
               bool result);

    /**
     * Tell the chrome process there is an creation of PBrowser.
     * return a system-wise unique Id.
     */
    sync AllocateTabId(TabId openerTabId, IPCTabContext context, ContentParentId cpId)
        returns (TabId tabId);
    async DeallocateTabId(TabId tabId);

    /**
     * Starts an offline application cache update.
     * @param manifestURI
     *   URI of the manifest to fetch, the application cache group ID
     * @param documentURI
     *   URI of the document that referred the manifest
     * @param stickDocument
     *   True if the update was initiated by a document load that referred
     *   a manifest.
     *   False if the update was initiated by applicationCache.update() call.
     *
     *   Tells the update to carry the documentURI to a potential separate
     *   update of implicit (master) items.
     *
     *   Why this argument? If the document was not found in an offline cache
     *   before load and refers a manifest and this manifest itself has not
     *   been changed since the last fetch, we will not do the application
     *   cache group update. But we must cache the document (identified by the
     *   documentURI). This argument will ensure that a previously uncached
     *   document will get cached and that we don't re-cache a document that
     *   has already been cached (stickDocument=false).
     * @param tabId
     *   To identify which tab owns the app.
     */
    POfflineCacheUpdate(URIParams manifestURI, URIParams documentURI,
                        bool stickDocument, TabId tabId);

    /**
     * Sets "offline-app" permission for the principal.  Called when we hit
     * a web app with the manifest attribute in <html> and
     * offline-apps.allow_by_default is set to true.
     */
    SetOfflinePermission(Principal principal);

both:
     AsyncMessage(nsString aMessage, ClonedMessageData aData,
                  CpowEntry[] aCpows, Principal aPrincipal);
};

}
}