Revert "Add Basilisk"

This reverts commit e72ef92b5bdc43cd2584198e2e54e951b70299e8.

1 files changed, 0 insertions, 905 deletions

diff --git a/application/basilisk/components/sessionstore/content/content-sessionStore.js b/application/basilisk/components/sessionstore/content/content-sessionStore.js
deleted file mode 100644
index 3c8f5488a..000000000
--- a/application/basilisk/components/sessionstore/content/content-sessionStore.js
+++ /dev/null
@@ -1,905 +0,0 @@
-/* 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/. */
-
-"use strict";
-
-function debug(msg) {
-  Services.console.logStringMessage("SessionStoreContent: " + msg);
-}
-
-var Cu = Components.utils;
-var Cc = Components.classes;
-var Ci = Components.interfaces;
-var Cr = Components.results;
-
-Cu.import("resource://gre/modules/XPCOMUtils.jsm", this);
-Cu.import("resource://gre/modules/Timer.jsm", this);
-
-XPCOMUtils.defineLazyModuleGetter(this, "FormData",
-  "resource://gre/modules/FormData.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "Preferences",
-  "resource://gre/modules/Preferences.jsm");
-
-XPCOMUtils.defineLazyModuleGetter(this, "DocShellCapabilities",
-  "resource:///modules/sessionstore/DocShellCapabilities.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "PageStyle",
-  "resource:///modules/sessionstore/PageStyle.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "ScrollPosition",
-  "resource://gre/modules/ScrollPosition.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "SessionHistory",
-  "resource:///modules/sessionstore/SessionHistory.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "SessionStorage",
-  "resource:///modules/sessionstore/SessionStorage.jsm");
-
-Cu.import("resource:///modules/sessionstore/FrameTree.jsm", this);
-var gFrameTree = new FrameTree(this);
-
-Cu.import("resource:///modules/sessionstore/ContentRestore.jsm", this);
-XPCOMUtils.defineLazyGetter(this, 'gContentRestore',
-                            () => { return new ContentRestore(this) });
-
-// The current epoch.
-var gCurrentEpoch = 0;
-
-// A bound to the size of data to store for DOM Storage.
-const DOM_STORAGE_MAX_CHARS = 10000000; // 10M characters
-
-// This pref controls whether or not we send updates to the parent on a timeout
-// or not, and should only be used for tests or debugging.
-const TIMEOUT_DISABLED_PREF = "browser.sessionstore.debug.no_auto_updates";
-
-const kNoIndex = Number.MAX_SAFE_INTEGER;
-const kLastIndex = Number.MAX_SAFE_INTEGER - 1;
-
-/**
- * Returns a lazy function that will evaluate the given
- * function |fn| only once and cache its return value.
- */
-function createLazy(fn) {
-  let cached = false;
-  let cachedValue = null;
-
-  return function lazy() {
-    if (!cached) {
-      cachedValue = fn();
-      cached = true;
-    }
-
-    return cachedValue;
-  };
-}
-
-/**
- * Listens for and handles content events that we need for the
- * session store service to be notified of state changes in content.
- */
-var EventListener = {
-
-  init: function () {
-    addEventListener("load", this, true);
-  },
-
-  handleEvent: function (event) {
-    // Ignore load events from subframes.
-    if (event.target != content.document) {
-      return;
-    }
-
-    if (content.document.documentURI.startsWith("about:reader")) {
-      if (event.type == "load" &&
-          !content.document.body.classList.contains("loaded")) {
-        // Don't restore the scroll position of an about:reader page at this
-        // point; listen for the custom event dispatched from AboutReader.jsm.
-        content.addEventListener("AboutReaderContentReady", this);
-        return;
-      }
-
-      content.removeEventListener("AboutReaderContentReady", this);
-    }
-
-    // Restore the form data and scroll position. If we're not currently
-    // restoring a tab state then this call will simply be a noop.
-    gContentRestore.restoreDocument();
-  }
-};
-
-/**
- * Listens for and handles messages sent by the session store service.
- */
-var MessageListener = {
-
-  MESSAGES: [
-    "SessionStore:restoreHistory",
-    "SessionStore:restoreTabContent",
-    "SessionStore:resetRestore",
-    "SessionStore:flush",
-    "SessionStore:becomeActiveProcess",
-  ],
-
-  init: function () {
-    this.MESSAGES.forEach(m => addMessageListener(m, this));
-  },
-
-  receiveMessage: function ({name, data}) {
-    // The docShell might be gone. Don't process messages,
-    // that will just lead to errors anyway.
-    if (!docShell) {
-      return;
-    }
-
-    // A fresh tab always starts with epoch=0. The parent has the ability to
-    // override that to signal a new era in this tab's life. This enables it
-    // to ignore async messages that were already sent but not yet received
-    // and would otherwise confuse the internal tab state.
-    if (data.epoch && data.epoch != gCurrentEpoch) {
-      gCurrentEpoch = data.epoch;
-    }
-
-    switch (name) {
-      case "SessionStore:restoreHistory":
-        this.restoreHistory(data);
-        break;
-      case "SessionStore:restoreTabContent":
-        this.restoreTabContent(data);
-        break;
-      case "SessionStore:resetRestore":
-        gContentRestore.resetRestore();
-        break;
-      case "SessionStore:flush":
-        this.flush(data);
-        break;
-      case "SessionStore:becomeActiveProcess":
-        let shistory = docShell.QueryInterface(Ci.nsIWebNavigation).sessionHistory;
-        // Check if we are at the end of the current session history, if we are,
-        // it is safe for us to collect and transmit our session history, so
-        // transmit all of it. Otherwise, we only want to transmit our index changes,
-        // so collect from kLastIndex.
-        if (shistory.globalCount - shistory.globalIndexOffset == shistory.count) {
-          SessionHistoryListener.collect();
-        } else {
-          SessionHistoryListener.collectFrom(kLastIndex);
-        }
-        break;
-      default:
-        debug("received unknown message '" + name + "'");
-        break;
-    }
-  },
-
-  restoreHistory({epoch, tabData, loadArguments, isRemotenessUpdate}) {
-    gContentRestore.restoreHistory(tabData, loadArguments, {
-      // Note: The callbacks passed here will only be used when a load starts
-      // that was not initiated by sessionstore itself. This can happen when
-      // some code calls browser.loadURI() or browser.reload() on a pending
-      // browser/tab.
-
-      onLoadStarted() {
-        // Notify the parent that the tab is no longer pending.
-        sendSyncMessage("SessionStore:restoreTabContentStarted", {epoch});
-      },
-
-      onLoadFinished() {
-        // Tell SessionStore.jsm that it may want to restore some more tabs,
-        // since it restores a max of MAX_CONCURRENT_TAB_RESTORES at a time.
-        sendAsyncMessage("SessionStore:restoreTabContentComplete", {epoch});
-      }
-    });
-
-    // When restoreHistory finishes, we send a synchronous message to
-    // SessionStore.jsm so that it can run SSTabRestoring. Users of
-    // SSTabRestoring seem to get confused if chrome and content are out of
-    // sync about the state of the restore (particularly regarding
-    // docShell.currentURI). Using a synchronous message is the easiest way
-    // to temporarily synchronize them.
-    sendSyncMessage("SessionStore:restoreHistoryComplete", {epoch, isRemotenessUpdate});
-  },
-
-  restoreTabContent({loadArguments, isRemotenessUpdate}) {
-    let epoch = gCurrentEpoch;
-
-    // We need to pass the value of didStartLoad back to SessionStore.jsm.
-    let didStartLoad = gContentRestore.restoreTabContent(loadArguments, isRemotenessUpdate, () => {
-      // Tell SessionStore.jsm that it may want to restore some more tabs,
-      // since it restores a max of MAX_CONCURRENT_TAB_RESTORES at a time.
-      sendAsyncMessage("SessionStore:restoreTabContentComplete", {epoch, isRemotenessUpdate});
-    });
-
-    sendAsyncMessage("SessionStore:restoreTabContentStarted", {epoch, isRemotenessUpdate});
-
-    if (!didStartLoad) {
-      // Pretend that the load succeeded so that event handlers fire correctly.
-      sendAsyncMessage("SessionStore:restoreTabContentComplete", {epoch, isRemotenessUpdate});
-    }
-  },
-
-  flush({id}) {
-    // Flush the message queue, send the latest updates.
-    MessageQueue.send({flushID: id});
-  }
-};
-
-/**
- * Listens for changes to the session history. Whenever the user navigates
- * we will collect URLs and everything belonging to session history.
- *
- * Causes a SessionStore:update message to be sent that contains the current
- * session history.
- *
- * Example:
- *   {entries: [{url: "about:mozilla", ...}, ...], index: 1}
- */
-var SessionHistoryListener = {
-  init: function () {
-    // The frame tree observer is needed to handle initial subframe loads.
-    // It will redundantly invalidate with the SHistoryListener in some cases
-    // but these invalidations are very cheap.
-    gFrameTree.addObserver(this);
-
-    // By adding the SHistoryListener immediately, we will unfortunately be
-    // notified of every history entry as the tab is restored. We don't bother
-    // waiting to add the listener later because these notifications are cheap.
-    // We will likely only collect once since we are batching collection on
-    // a delay.
-    docShell.QueryInterface(Ci.nsIWebNavigation).sessionHistory.
-      addSHistoryListener(this);
-
-    // Collect data if we start with a non-empty shistory.
-    if (!SessionHistory.isEmpty(docShell)) {
-      this.collect();
-      // When a tab is detached from the window, for the new window there is a
-      // new SessionHistoryListener created. Normally it is empty at this point
-      // but in a test env. the initial about:blank might have a children in which
-      // case we fire off a history message here with about:blank in it. If we
-      // don't do it ASAP then there is going to be a browser swap and the parent
-      // will be all confused by that message.
-      MessageQueue.send();
-    }
-
-    // Listen for page title changes.
-    addEventListener("DOMTitleChanged", this);
-  },
-
-  uninit: function () {
-    let sessionHistory = docShell.QueryInterface(Ci.nsIWebNavigation).sessionHistory;
-    if (sessionHistory) {
-      sessionHistory.removeSHistoryListener(this);
-    }
-  },
-
-  collect: function () {
-    // We want to send down a historychange even for full collects in case our
-    // session history is a partial session history, in which case we don't have
-    // enough information for a full update. collectFrom(-1) tells the collect
-    // function to collect all data avaliable in this process.
-    if (docShell) {
-      this.collectFrom(-1);
-    }
-  },
-
-  _fromIdx: kNoIndex,
-
-  // History can grow relatively big with the nested elements, so if we don't have to, we
-  // don't want to send the entire history all the time. For a simple optimization
-  // we keep track of the smallest index from after any change has occured and we just send
-  // the elements from that index. If something more complicated happens we just clear it
-  // and send the entire history. We always send the additional info like the current selected
-  // index (so for going back and forth between history entries we set the index to kLastIndex
-  // if nothing else changed send an empty array and the additonal info like the selected index)
-  collectFrom: function (idx) {
-    if (this._fromIdx <= idx) {
-      // If we already know that we need to update history fromn index N we can ignore any changes
-      // tha happened with an element with index larger than N.
-      // Note: initially we use kNoIndex which is MAX_SAFE_INTEGER which means we don't ignore anything
-      // here, and in case of navigation in the history back and forth we use kLastIndex which ignores
-      // only the subsequent navigations, but not any new elements added.
-      return;
-    }
-
-    this._fromIdx = idx;
-    MessageQueue.push("historychange", () => {
-      if (this._fromIdx === kNoIndex) {
-        return null;
-      }
-
-      let history = SessionHistory.collect(docShell, this._fromIdx);
-      this._fromIdx = kNoIndex;
-      return history;
-    });
-  },
-
-  handleEvent(event) {
-    this.collect();
-  },
-
-  onFrameTreeCollected: function () {
-    this.collect();
-  },
-
-  onFrameTreeReset: function () {
-    this.collect();
-  },
-
-  OnHistoryNewEntry: function (newURI, oldIndex) {
-    this.collectFrom(oldIndex);
-  },
-
-  OnHistoryGoBack: function (backURI) {
-    this.collectFrom(kLastIndex);
-    return true;
-  },
-
-  OnHistoryGoForward: function (forwardURI) {
-    this.collectFrom(kLastIndex);
-    return true;
-  },
-
-  OnHistoryGotoIndex: function (index, gotoURI) {
-    this.collectFrom(kLastIndex);
-    return true;
-  },
-
-  OnHistoryPurge: function (numEntries) {
-    this.collect();
-    return true;
-  },
-
-  OnHistoryReload: function (reloadURI, reloadFlags) {
-    this.collect();
-    return true;
-  },
-
-  OnHistoryReplaceEntry: function (index) {
-    this.collect();
-  },
-
-  QueryInterface: XPCOMUtils.generateQI([
-    Ci.nsISHistoryListener,
-    Ci.nsISupportsWeakReference
-  ])
-};
-
-/**
- * Listens for scroll position changes. Whenever the user scrolls the top-most
- * frame we update the scroll position and will restore it when requested.
- *
- * Causes a SessionStore:update message to be sent that contains the current
- * scroll positions as a tree of strings. If no frame of the whole frame tree
- * is scrolled this will return null so that we don't tack a property onto
- * the tabData object in the parent process.
- *
- * Example:
- *   {scroll: "100,100", children: [null, null, {scroll: "200,200"}]}
- */
-var ScrollPositionListener = {
-  init: function () {
-    addEventListener("scroll", this);
-    gFrameTree.addObserver(this);
-  },
-
-  handleEvent: function (event) {
-    let frame = event.target.defaultView;
-
-    // Don't collect scroll data for frames created at or after the load event
-    // as SessionStore can't restore scroll data for those.
-    if (gFrameTree.contains(frame)) {
-      MessageQueue.push("scroll", () => this.collect());
-    }
-  },
-
-  onFrameTreeCollected: function () {
-    MessageQueue.push("scroll", () => this.collect());
-  },
-
-  onFrameTreeReset: function () {
-    MessageQueue.push("scroll", () => null);
-  },
-
-  collect: function () {
-    return gFrameTree.map(ScrollPosition.collect);
-  }
-};
-
-/**
- * Listens for changes to input elements. Whenever the value of an input
- * element changes we will re-collect data for the current frame tree and send
- * a message to the parent process.
- *
- * Causes a SessionStore:update message to be sent that contains the form data
- * for all reachable frames.
- *
- * Example:
- *   {
- *     formdata: {url: "http://mozilla.org/", id: {input_id: "input value"}},
- *     children: [
- *       null,
- *       {url: "http://sub.mozilla.org/", id: {input_id: "input value 2"}}
- *     ]
- *   }
- */
-var FormDataListener = {
-  init: function () {
-    addEventListener("input", this, true);
-    addEventListener("change", this, true);
-    gFrameTree.addObserver(this);
-  },
-
-  handleEvent: function (event) {
-    let frame = event.target.ownerGlobal;
-
-    // Don't collect form data for frames created at or after the load event
-    // as SessionStore can't restore form data for those.
-    if (gFrameTree.contains(frame)) {
-      MessageQueue.push("formdata", () => this.collect());
-    }
-  },
-
-  onFrameTreeReset: function () {
-    MessageQueue.push("formdata", () => null);
-  },
-
-  collect: function () {
-    return gFrameTree.map(FormData.collect);
-  }
-};
-
-/**
- * Listens for changes to the page style. Whenever a different page style is
- * selected or author styles are enabled/disabled we send a message with the
- * currently applied style to the chrome process.
- *
- * Causes a SessionStore:update message to be sent that contains the currently
- * selected pageStyle for all reachable frames.
- *
- * Example:
- *   {pageStyle: "Dusk", children: [null, {pageStyle: "Mozilla"}]}
- */
-var PageStyleListener = {
-  init: function () {
-    Services.obs.addObserver(this, "author-style-disabled-changed", false);
-    Services.obs.addObserver(this, "style-sheet-applicable-state-changed", false);
-    gFrameTree.addObserver(this);
-  },
-
-  uninit: function () {
-    Services.obs.removeObserver(this, "author-style-disabled-changed");
-    Services.obs.removeObserver(this, "style-sheet-applicable-state-changed");
-  },
-
-  observe: function (subject, topic) {
-    let frame = subject.defaultView;
-
-    if (frame && gFrameTree.contains(frame)) {
-      MessageQueue.push("pageStyle", () => this.collect());
-    }
-  },
-
-  collect: function () {
-    return PageStyle.collect(docShell, gFrameTree);
-  },
-
-  onFrameTreeCollected: function () {
-    MessageQueue.push("pageStyle", () => this.collect());
-  },
-
-  onFrameTreeReset: function () {
-    MessageQueue.push("pageStyle", () => null);
-  }
-};
-
-/**
- * Listens for changes to docShell capabilities. Whenever a new load is started
- * we need to re-check the list of capabilities and send message when it has
- * changed.
- *
- * Causes a SessionStore:update message to be sent that contains the currently
- * disabled docShell capabilities (all nsIDocShell.allow* properties set to
- * false) as a string - i.e. capability names separate by commas.
- */
-var DocShellCapabilitiesListener = {
-  /**
-   * This field is used to compare the last docShell capabilities to the ones
-   * that have just been collected. If nothing changed we won't send a message.
-   */
-  _latestCapabilities: "",
-
-  init: function () {
-    gFrameTree.addObserver(this);
-  },
-
-  /**
-   * onFrameTreeReset() is called as soon as we start loading a page.
-   */
-  onFrameTreeReset: function() {
-    // The order of docShell capabilities cannot change while we're running
-    // so calling join() without sorting before is totally sufficient.
-    let caps = DocShellCapabilities.collect(docShell).join(",");
-
-    // Send new data only when the capability list changes.
-    if (caps != this._latestCapabilities) {
-      this._latestCapabilities = caps;
-      MessageQueue.push("disallow", () => caps || null);
-    }
-  }
-};
-
-/**
- * Listens for changes to the DOMSessionStorage. Whenever new keys are added,
- * existing ones removed or changed, or the storage is cleared we will send a
- * message to the parent process containing up-to-date sessionStorage data.
- *
- * Causes a SessionStore:update message to be sent that contains the current
- * DOMSessionStorage contents. The data is a nested object using host names
- * as keys and per-host DOMSessionStorage data as values.
- */
-var SessionStorageListener = {
-  init: function () {
-    addEventListener("MozSessionStorageChanged", this, true);
-    Services.obs.addObserver(this, "browser:purge-domain-data", false);
-    gFrameTree.addObserver(this);
-  },
-
-  uninit: function () {
-    Services.obs.removeObserver(this, "browser:purge-domain-data");
-  },
-
-  handleEvent: function (event) {
-    if (gFrameTree.contains(event.target)) {
-      this.collectFromEvent(event);
-    }
-  },
-
-  observe: function () {
-    // Collect data on the next tick so that any other observer
-    // that needs to purge data can do its work first.
-    setTimeout(() => this.collect(), 0);
-  },
-
-  // Before DOM Storage can be written to disk, it needs to be serialized
-  // for sending across frames/processes, then again to be sent across
-  // threads, then again to be put in a buffer for the disk. Each of these
-  // serializations is an opportunity to OOM and (depending on the site of
-  // the OOM), either crash, lose all data for the frame or lose all data
-  // for the application.
-  //
-  // In order to avoid this, compute an estimate of the size of the
-  // object, and block SessionStorage items that are too large. As
-  // we also don't want to cause an OOM here, we use a quick and memory-
-  // efficient approximation: we compute the total sum of string lengths
-  // involved in this object.
-  estimateStorageSize: function(collected) {
-    if (!collected) {
-      return 0;
-    }
-
-    let size = 0;
-    for (let host of Object.keys(collected)) {
-      size += host.length;
-      let perHost = collected[host];
-      for (let key of Object.keys(perHost)) {
-        size += key.length;
-        let perKey = perHost[key];
-        size += perKey.length;
-      }
-    }
-
-    return size;
-  },
-
-  // We don't want to send all the session storage data for all the frames
-  // for every change. So if only a few value changed we send them over as
-  // a "storagechange" event. If however for some reason before we send these
-  // changes we have to send over the entire sessions storage data, we just
-  // reset these changes.
-  _changes: undefined,
-
-  resetChanges: function () {
-    this._changes = undefined;
-  },
-
-  collectFromEvent: function (event) {
-    // TODO: we should take browser.sessionstore.dom_storage_limit into an account here.
-    if (docShell) {
-      let {url, key, newValue} = event;
-      let uri = Services.io.newURI(url);
-      let domain = uri.prePath;
-      if (!this._changes) {
-        this._changes = {};
-      }
-      if (!this._changes[domain]) {
-        this._changes[domain] = {};
-      }
-      this._changes[domain][key] = newValue;
-
-      MessageQueue.push("storagechange", () => {
-        let tmp = this._changes;
-        // If there were multiple changes we send them merged.
-        // First one will collect all the changes the rest of
-        // these messages will be ignored.
-        this.resetChanges();
-        return tmp;
-      });
-    }
-  },
-
-  collect: function () {
-    if (docShell) {
-      // We need the entire session storage, let's reset the pending individual change
-      // messages.
-      this.resetChanges();
-      MessageQueue.push("storage", () => {
-        let collected = SessionStorage.collect(docShell, gFrameTree);
-
-        if (collected == null) {
-          return collected;
-        }
-
-        let size = this.estimateStorageSize(collected);
-
-        MessageQueue.push("telemetry", () => ({ FX_SESSION_RESTORE_DOM_STORAGE_SIZE_ESTIMATE_CHARS: size }));
-        if (size > Preferences.get("browser.sessionstore.dom_storage_limit", DOM_STORAGE_MAX_CHARS)) {
-          // Rather than keeping the old storage, which wouldn't match the rest
-          // of the state of the page, empty the storage. DOM storage will be
-          // recollected the next time and stored if it is now small enough.
-          return {};
-        }
-
-        return collected;
-      });
-    }
-  },
-
-  onFrameTreeCollected: function () {
-    this.collect();
-  },
-
-  onFrameTreeReset: function () {
-    this.collect();
-  }
-};
-
-/**
- * Listen for changes to the privacy status of the tab.
- * By definition, tabs start in non-private mode.
- *
- * Causes a SessionStore:update message to be sent for
- * field "isPrivate". This message contains
- *  |true| if the tab is now private
- *  |null| if the tab is now public - the field is therefore
- *  not saved.
- */
-var PrivacyListener = {
-  init: function() {
-    docShell.addWeakPrivacyTransitionObserver(this);
-
-    // Check that value at startup as it might have
-    // been set before the frame script was loaded.
-    if (docShell.QueryInterface(Ci.nsILoadContext).usePrivateBrowsing) {
-      MessageQueue.push("isPrivate", () => true);
-    }
-  },
-
-  // Ci.nsIPrivacyTransitionObserver
-  privateModeChanged: function(enabled) {
-    MessageQueue.push("isPrivate", () => enabled || null);
-  },
-
-  QueryInterface: XPCOMUtils.generateQI([Ci.nsIPrivacyTransitionObserver,
-                                         Ci.nsISupportsWeakReference])
-};
-
-/**
- * A message queue that takes collected data and will take care of sending it
- * to the chrome process. It allows flushing using synchronous messages and
- * takes care of any race conditions that might occur because of that. Changes
- * will be batched if they're pushed in quick succession to avoid a message
- * flood.
- */
-var MessageQueue = {
-  /**
-   * A map (string -> lazy fn) holding lazy closures of all queued data
-   * collection routines. These functions will return data collected from the
-   * docShell.
-   */
-  _data: new Map(),
-
-  /**
-   * The delay (in ms) used to delay sending changes after data has been
-   * invalidated.
-   */
-  BATCH_DELAY_MS: 1000,
-
-  /**
-   * The current timeout ID, null if there is no queue data. We use timeouts
-   * to damp a flood of data changes and send lots of changes as one batch.
-   */
-  _timeout: null,
-
-  /**
-   * Whether or not sending batched messages on a timer is disabled. This should
-   * only be used for debugging or testing. If you need to access this value,
-   * you should probably use the timeoutDisabled getter.
-   */
-  _timeoutDisabled: false,
-
-  /**
-   * True if batched messages are not being fired on a timer. This should only
-   * ever be true when debugging or during tests.
-   */
-  get timeoutDisabled() {
-    return this._timeoutDisabled;
-  },
-
-  /**
-   * Disables sending batched messages on a timer. Also cancels any pending
-   * timers.
-   */
-  set timeoutDisabled(val) {
-    this._timeoutDisabled = val;
-
-    if (val && this._timeout) {
-      clearTimeout(this._timeout);
-      this._timeout = null;
-    }
-
-    return val;
-  },
-
-  init() {
-    this.timeoutDisabled =
-      Services.prefs.getBoolPref(TIMEOUT_DISABLED_PREF);
-
-    Services.prefs.addObserver(TIMEOUT_DISABLED_PREF, this, false);
-  },
-
-  uninit() {
-    Services.prefs.removeObserver(TIMEOUT_DISABLED_PREF, this);
-  },
-
-  observe(subject, topic, data) {
-    if (topic == "nsPref:changed" && data == TIMEOUT_DISABLED_PREF) {
-      this.timeoutDisabled =
-        Services.prefs.getBoolPref(TIMEOUT_DISABLED_PREF);
-    }
-  },
-
-  /**
-   * Pushes a given |value| onto the queue. The given |key| represents the type
-   * of data that is stored and can override data that has been queued before
-   * but has not been sent to the parent process, yet.
-   *
-   * @param key (string)
-   *        A unique identifier specific to the type of data this is passed.
-   * @param fn (function)
-   *        A function that returns the value that will be sent to the parent
-   *        process.
-   */
-  push: function (key, fn) {
-    this._data.set(key, createLazy(fn));
-
-    if (!this._timeout && !this._timeoutDisabled) {
-      // Wait a little before sending the message to batch multiple changes.
-      this._timeout = setTimeout(() => this.send(), this.BATCH_DELAY_MS);
-    }
-  },
-
-  /**
-   * Sends queued data to the chrome process.
-   *
-   * @param options (object)
-   *        {flushID: 123} to specify that this is a flush
-   *        {isFinal: true} to signal this is the final message sent on unload
-   */
-  send: function (options = {}) {
-    // Looks like we have been called off a timeout after the tab has been
-    // closed. The docShell is gone now and we can just return here as there
-    // is nothing to do.
-    if (!docShell) {
-      return;
-    }
-
-    if (this._timeout) {
-      clearTimeout(this._timeout);
-      this._timeout = null;
-    }
-
-    let flushID = (options && options.flushID) || 0;
-
-    let durationMs = Date.now();
-
-    let data = {};
-    let telemetry = {};
-    for (let [key, func] of this._data) {
-      let value = func();
-      if (key == "telemetry") {
-        for (let histogramId of Object.keys(value)) {
-          telemetry[histogramId] = value[histogramId];
-        }
-      } else if (value || (key != "storagechange" && key != "historychange")) {
-        data[key] = value;
-      }
-    }
-
-    this._data.clear();
-
-    durationMs = Date.now() - durationMs;
-    telemetry.FX_SESSION_RESTORE_CONTENT_COLLECT_DATA_LONGEST_OP_MS = durationMs;
-
-    try {
-      // Send all data to the parent process.
-      sendAsyncMessage("SessionStore:update", {
-        data, telemetry, flushID,
-        isFinal: options.isFinal || false,
-        epoch: gCurrentEpoch
-      });
-    } catch (ex if ex && ex.result == Cr.NS_ERROR_OUT_OF_MEMORY) {
-      let telemetry = {
-        FX_SESSION_RESTORE_SEND_UPDATE_CAUSED_OOM: 1
-      };
-      sendAsyncMessage("SessionStore:error", {
-        telemetry
-      });
-    }
-  },
-};
-
-EventListener.init();
-MessageListener.init();
-FormDataListener.init();
-PageStyleListener.init();
-SessionHistoryListener.init();
-SessionStorageListener.init();
-ScrollPositionListener.init();
-DocShellCapabilitiesListener.init();
-PrivacyListener.init();
-MessageQueue.init();
-
-function handleRevivedTab() {
-  if (!content) {
-    removeEventListener("pagehide", handleRevivedTab);
-    return;
-  }
-
-  if (content.document.documentURI.startsWith("about:tabcrashed")) {
-    if (Services.appinfo.processType != Services.appinfo.PROCESS_TYPE_DEFAULT) {
-      // Sanity check - we'd better be loading this in a non-remote browser.
-      throw new Error("We seem to be navigating away from about:tabcrashed in " +
-                      "a non-remote browser. This should really never happen.");
-    }
-
-    removeEventListener("pagehide", handleRevivedTab);
-
-    // Notify the parent.
-    sendAsyncMessage("SessionStore:crashedTabRevived");
-  }
-}
-
-// If we're browsing from the tab crashed UI to a blacklisted URI that keeps
-// this browser non-remote, we'll handle that in a pagehide event.
-addEventListener("pagehide", handleRevivedTab);
-
-addEventListener("unload", () => {
-  // Upon frameLoader destruction, send a final update message to
-  // the parent and flush all data currently held in the child.
-  MessageQueue.send({isFinal: true});
-
-  // If we're browsing from the tab crashed UI to a URI that causes the tab
-  // to go remote again, we catch this in the unload event handler, because
-  // swapping out the non-remote browser for a remote one in
-  // tabbrowser.xml's updateBrowserRemoteness doesn't cause the pagehide
-  // event to be fired.
-  handleRevivedTab();
-
-  // Remove all registered nsIObservers.
-  PageStyleListener.uninit();
-  SessionStorageListener.uninit();
-  SessionHistoryListener.uninit();
-  MessageQueue.uninit();
-
-  // Remove progress listeners.
-  gContentRestore.resetRestore();
-
-  // We don't need to take care of any gFrameTree observers as the gFrameTree
-  // will die with the content script. The same goes for the privacy transition
-  // observer that will die with the docShell when the tab is closed.
-});