From 086c044dc34dfc0f74fbe41f4ecb402b2cd34884 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 03:13:33 +0200
Subject: Merging upstream version 125.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 dom/browser-element/BrowserElementChild.js         |  42 --
 dom/browser-element/BrowserElementChildPreload.js  | 290 ---------
 dom/browser-element/BrowserElementParent.jsm       | 276 --------
 .../BrowserElementPromptService.jsm                | 720 ---------------------
 dom/browser-element/components.conf                |  14 -
 dom/browser-element/moz.build                      |  37 --
 dom/browser-element/nsIBrowserElementAPI.idl       |  44 --
 7 files changed, 1423 deletions(-)
 delete mode 100644 dom/browser-element/BrowserElementChild.js
 delete mode 100644 dom/browser-element/BrowserElementChildPreload.js
 delete mode 100644 dom/browser-element/BrowserElementParent.jsm
 delete mode 100644 dom/browser-element/BrowserElementPromptService.jsm
 delete mode 100644 dom/browser-element/components.conf
 delete mode 100644 dom/browser-element/moz.build
 delete mode 100644 dom/browser-element/nsIBrowserElementAPI.idl

(limited to 'dom/browser-element')

diff --git a/dom/browser-element/BrowserElementChild.js b/dom/browser-element/BrowserElementChild.js
deleted file mode 100644
index 762957bcd4..0000000000
--- a/dom/browser-element/BrowserElementChild.js
+++ /dev/null
@@ -1,42 +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/. */
-
-/* eslint-env mozilla/frame-script */
-/* global api, CopyPasteAssistent */
-
-"use strict";
-
-function debug(msg) {
-  // dump("BrowserElementChild - " + msg + "\n");
-}
-
-var BrowserElementIsReady;
-
-debug(`Might load BE scripts: BEIR: ${BrowserElementIsReady}`);
-if (!BrowserElementIsReady) {
-  debug("Loading BE scripts");
-  if (!("BrowserElementIsPreloaded" in this)) {
-    Services.scriptloader.loadSubScript(
-      "chrome://global/content/BrowserElementChildPreload.js",
-      this
-    );
-  }
-
-  function onDestroy() {
-    removeMessageListener("browser-element-api:destroy", onDestroy);
-
-    if (api) {
-      api.destroy();
-    }
-
-    BrowserElementIsReady = false;
-  }
-  addMessageListener("browser-element-api:destroy", onDestroy);
-
-  BrowserElementIsReady = true;
-} else {
-  debug("BE already loaded, abort");
-}
-
-sendAsyncMessage("browser-element-api:call", { msg_name: "hello" });
diff --git a/dom/browser-element/BrowserElementChildPreload.js b/dom/browser-element/BrowserElementChildPreload.js
deleted file mode 100644
index 1bbcf9ff05..0000000000
--- a/dom/browser-element/BrowserElementChildPreload.js
+++ /dev/null
@@ -1,290 +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";
-
-/* eslint-env mozilla/frame-script */
-
-function debug(msg) {
-  // dump("BrowserElementChildPreload - " + msg + "\n");
-}
-
-debug("loaded");
-
-var BrowserElementIsReady;
-
-var { BrowserElementPromptService } = ChromeUtils.import(
-  "resource://gre/modules/BrowserElementPromptService.jsm"
-);
-
-function sendAsyncMsg(msg, data) {
-  // Ensure that we don't send any messages before BrowserElementChild.js
-  // finishes loading.
-  if (!BrowserElementIsReady) {
-    return;
-  }
-
-  if (!data) {
-    data = {};
-  }
-
-  data.msg_name = msg;
-  sendAsyncMessage("browser-element-api:call", data);
-}
-
-var LISTENED_EVENTS = [
-  // This listens to unload events from our message manager, but /not/ from
-  // the |content| window.  That's because the window's unload event doesn't
-  // bubble, and we're not using a capturing listener.  If we'd used
-  // useCapture == true, we /would/ hear unload events from the window, which
-  // is not what we want!
-  { type: "unload", useCapture: false, wantsUntrusted: false },
-];
-
-/**
- * The BrowserElementChild implements one half of <iframe mozbrowser>.
- * (The other half is, unsurprisingly, BrowserElementParent.)
- *
- * This script is injected into an <iframe mozbrowser> via
- * nsIMessageManager::LoadFrameScript().
- *
- * Our job here is to listen for events within this frame and bubble them up to
- * the parent process.
- */
-
-var global = this;
-
-function BrowserElementChild() {
-  // Maps outer window id --> weak ref to window.  Used by modal dialog code.
-  this._windowIDDict = {};
-
-  this._init();
-}
-
-BrowserElementChild.prototype = {
-  _init() {
-    debug("Starting up.");
-
-    BrowserElementPromptService.mapWindowToBrowserElementChild(content, this);
-
-    this._shuttingDown = false;
-
-    LISTENED_EVENTS.forEach(event => {
-      addEventListener(
-        event.type,
-        this,
-        event.useCapture,
-        event.wantsUntrusted
-      );
-    });
-
-    addMessageListener("browser-element-api:call", this);
-  },
-
-  /**
-   * Shut down the frame's side of the browser API.  This is called when:
-   *   - our BrowserChildGlobal starts to die
-   *   - the content is moved to frame without the browser API
-   * This is not called when the page inside |content| unloads.
-   */
-  destroy() {
-    debug("Destroying");
-    this._shuttingDown = true;
-
-    BrowserElementPromptService.unmapWindowToBrowserElementChild(content);
-
-    LISTENED_EVENTS.forEach(event => {
-      removeEventListener(
-        event.type,
-        this,
-        event.useCapture,
-        event.wantsUntrusted
-      );
-    });
-
-    removeMessageListener("browser-element-api:call", this);
-  },
-
-  handleEvent(event) {
-    switch (event.type) {
-      case "unload":
-        this.destroy(event);
-        break;
-    }
-  },
-
-  receiveMessage(message) {
-    let self = this;
-
-    let mmCalls = {
-      "unblock-modal-prompt": this._recvStopWaiting,
-    };
-
-    if (message.data.msg_name in mmCalls) {
-      return mmCalls[message.data.msg_name].apply(self, arguments);
-    }
-    return undefined;
-  },
-
-  get _windowUtils() {
-    return content.document.defaultView.windowUtils;
-  },
-
-  _tryGetInnerWindowID(win) {
-    try {
-      return win.windowGlobalChild.innerWindowId;
-    } catch (e) {
-      return null;
-    }
-  },
-
-  /**
-   * Show a modal prompt.  Called by BrowserElementPromptService.
-   */
-  showModalPrompt(win, args) {
-    args.windowID = {
-      outer: win.docShell.outerWindowID,
-      inner: this._tryGetInnerWindowID(win),
-    };
-    sendAsyncMsg("showmodalprompt", args);
-
-    let returnValue = this._waitForResult(win);
-
-    if (
-      args.promptType == "prompt" ||
-      args.promptType == "confirm" ||
-      args.promptType == "custom-prompt"
-    ) {
-      return returnValue;
-    }
-    return undefined;
-  },
-
-  /**
-   * Spin in a nested event loop until we receive a unblock-modal-prompt message for
-   * this window.
-   */
-  _waitForResult(win) {
-    debug("_waitForResult(" + win + ")");
-    let utils = win.windowUtils;
-
-    let outerWindowID = win.docShell.outerWindowID;
-    let innerWindowID = this._tryGetInnerWindowID(win);
-    if (innerWindowID === null) {
-      // I have no idea what waiting for a result means when there's no inner
-      // window, so let's just bail.
-      debug("_waitForResult: No inner window. Bailing.");
-      return undefined;
-    }
-
-    this._windowIDDict[outerWindowID] = Cu.getWeakReference(win);
-
-    debug(
-      "Entering modal state (outerWindowID=" +
-        outerWindowID +
-        ", " +
-        "innerWindowID=" +
-        innerWindowID +
-        ")"
-    );
-
-    utils.enterModalState();
-
-    // We'll decrement win.modalDepth when we receive a unblock-modal-prompt message
-    // for the window.
-    if (!win.modalDepth) {
-      win.modalDepth = 0;
-    }
-    win.modalDepth++;
-    let origModalDepth = win.modalDepth;
-
-    debug("Nested event loop - begin");
-    Services.tm.spinEventLoopUntil(
-      "BrowserElementChildPreload.js:_waitForResult",
-      () => {
-        // Bail out of the loop if the inner window changed; that means the
-        // window navigated.  Bail out when we're shutting down because otherwise
-        // we'll leak our window.
-        if (this._tryGetInnerWindowID(win) !== innerWindowID) {
-          debug(
-            "_waitForResult: Inner window ID changed " +
-              "while in nested event loop."
-          );
-          return true;
-        }
-
-        return win.modalDepth !== origModalDepth || this._shuttingDown;
-      }
-    );
-    debug("Nested event loop - finish");
-
-    if (win.modalDepth == 0) {
-      delete this._windowIDDict[outerWindowID];
-    }
-
-    // If we exited the loop because the inner window changed, then bail on the
-    // modal prompt.
-    if (innerWindowID !== this._tryGetInnerWindowID(win)) {
-      throw Components.Exception(
-        "Modal state aborted by navigation",
-        Cr.NS_ERROR_NOT_AVAILABLE
-      );
-    }
-
-    let returnValue = win.modalReturnValue;
-    delete win.modalReturnValue;
-
-    if (!this._shuttingDown) {
-      utils.leaveModalState();
-    }
-
-    debug(
-      "Leaving modal state (outerID=" +
-        outerWindowID +
-        ", " +
-        "innerID=" +
-        innerWindowID +
-        ")"
-    );
-    return returnValue;
-  },
-
-  _recvStopWaiting(msg) {
-    let outerID = msg.json.windowID.outer;
-    let innerID = msg.json.windowID.inner;
-    let returnValue = msg.json.returnValue;
-    debug(
-      "recvStopWaiting(outer=" +
-        outerID +
-        ", inner=" +
-        innerID +
-        ", returnValue=" +
-        returnValue +
-        ")"
-    );
-
-    if (!this._windowIDDict[outerID]) {
-      debug("recvStopWaiting: No record of outer window ID " + outerID);
-      return;
-    }
-
-    let win = this._windowIDDict[outerID].get();
-
-    if (!win) {
-      debug("recvStopWaiting, but window is gone\n");
-      return;
-    }
-
-    if (innerID !== this._tryGetInnerWindowID(win)) {
-      debug("recvStopWaiting, but inner ID has changed\n");
-      return;
-    }
-
-    debug("recvStopWaiting " + win);
-    win.modalReturnValue = returnValue;
-    win.modalDepth--;
-  },
-};
-
-var api = new BrowserElementChild();
diff --git a/dom/browser-element/BrowserElementParent.jsm b/dom/browser-element/BrowserElementParent.jsm
deleted file mode 100644
index ec342dace2..0000000000
--- a/dom/browser-element/BrowserElementParent.jsm
+++ /dev/null
@@ -1,276 +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";
-
-/* BrowserElementParent injects script to listen for certain events in the
- * child.  We then listen to messages from the child script and take
- * appropriate action here in the parent.
- */
-
-const { BrowserElementPromptService } = ChromeUtils.import(
-  "resource://gre/modules/BrowserElementPromptService.jsm"
-);
-
-function debug(msg) {
-  // dump("BrowserElementParent - " + msg + "\n");
-}
-
-function handleWindowEvent(e) {
-  if (this._browserElementParents) {
-    let beps = ChromeUtils.nondeterministicGetWeakMapKeys(
-      this._browserElementParents
-    );
-    beps.forEach(bep => bep._handleOwnerEvent(e));
-  }
-}
-
-function BrowserElementParent() {
-  debug("Creating new BrowserElementParent object");
-}
-
-BrowserElementParent.prototype = {
-  classDescription: "BrowserElementAPI implementation",
-  classID: Components.ID("{9f171ac4-0939-4ef8-b360-3408aedc3060}"),
-  contractID: "@mozilla.org/dom/browser-element-api;1",
-  QueryInterface: ChromeUtils.generateQI([
-    "nsIBrowserElementAPI",
-    "nsISupportsWeakReference",
-  ]),
-
-  setFrameLoader(frameLoader) {
-    debug("Setting frameLoader");
-    this._frameLoader = frameLoader;
-    this._frameElement = frameLoader.ownerElement;
-    if (!this._frameElement) {
-      debug("No frame element?");
-      return;
-    }
-    // Listen to visibilitychange on the iframe's owner window, and forward
-    // changes down to the child.  We want to do this while registering as few
-    // visibilitychange listeners on _window as possible, because such a listener
-    // may live longer than this BrowserElementParent object.
-    //
-    // To accomplish this, we register just one listener on the window, and have
-    // it reference a WeakMap whose keys are all the BrowserElementParent objects
-    // on the window.  Then when the listener fires, we iterate over the
-    // WeakMap's keys (which we can do, because we're chrome) to notify the
-    // BrowserElementParents.
-    if (!this._window._browserElementParents) {
-      this._window._browserElementParents = new WeakMap();
-      let handler = handleWindowEvent.bind(this._window);
-      let windowEvents = ["visibilitychange"];
-      for (let event of windowEvents) {
-        Services.els.addSystemEventListener(
-          this._window,
-          event,
-          handler,
-          /* useCapture = */ true
-        );
-      }
-    }
-
-    this._window._browserElementParents.set(this, null);
-
-    // Insert ourself into the prompt service.
-    BrowserElementPromptService.mapFrameToBrowserElementParent(
-      this._frameElement,
-      this
-    );
-    this._setupMessageListener();
-  },
-
-  destroyFrameScripts() {
-    debug("Destroying frame scripts");
-    this._mm.sendAsyncMessage("browser-element-api:destroy");
-  },
-
-  _setupMessageListener() {
-    this._mm = this._frameLoader.messageManager;
-    this._mm.addMessageListener("browser-element-api:call", this);
-  },
-
-  receiveMessage(aMsg) {
-    if (!this._isAlive()) {
-      return undefined;
-    }
-
-    // Messages we receive are handed to functions which take a (data) argument,
-    // where |data| is the message manager's data object.
-    // We use a single message and dispatch to various function based
-    // on data.msg_name
-    let mmCalls = {
-      hello: this._recvHello,
-    };
-
-    let mmSecuritySensitiveCalls = {
-      showmodalprompt: this._handleShowModalPrompt,
-    };
-
-    if (aMsg.data.msg_name in mmCalls) {
-      return mmCalls[aMsg.data.msg_name].apply(this, arguments);
-    } else if (aMsg.data.msg_name in mmSecuritySensitiveCalls) {
-      return mmSecuritySensitiveCalls[aMsg.data.msg_name].apply(
-        this,
-        arguments
-      );
-    }
-    return undefined;
-  },
-
-  _removeMessageListener() {
-    this._mm.removeMessageListener("browser-element-api:call", this);
-  },
-
-  /**
-   * You shouldn't touch this._frameElement or this._window if _isAlive is
-   * false.  (You'll likely get an exception if you do.)
-   */
-  _isAlive() {
-    return (
-      !Cu.isDeadWrapper(this._frameElement) &&
-      !Cu.isDeadWrapper(this._frameElement.ownerDocument) &&
-      !Cu.isDeadWrapper(this._frameElement.ownerGlobal)
-    );
-  },
-
-  get _window() {
-    return this._frameElement.ownerGlobal;
-  },
-
-  _sendAsyncMsg(msg, data) {
-    try {
-      if (!data) {
-        data = {};
-      }
-
-      data.msg_name = msg;
-      this._mm.sendAsyncMessage("browser-element-api:call", data);
-    } catch (e) {
-      return false;
-    }
-    return true;
-  },
-
-  _recvHello() {
-    debug("recvHello");
-
-    // Inform our child if our owner element's document is invisible.  Note
-    // that we must do so here, rather than in the BrowserElementParent
-    // constructor, because the BrowserElementChild may not be initialized when
-    // we run our constructor.
-    if (this._window.document.hidden) {
-      this._ownerVisibilityChange();
-    }
-  },
-
-  /**
-   * Fire either a vanilla or a custom event, depending on the contents of
-   * |data|.
-   */
-  _fireEventFromMsg(data) {
-    let detail = data.json;
-    let name = detail.msg_name;
-
-    // For events that send a "_payload_" property, we just want to transmit
-    // this in the event.
-    if ("_payload_" in detail) {
-      detail = detail._payload_;
-    }
-
-    debug("fireEventFromMsg: " + name + ", " + JSON.stringify(detail));
-    let evt = this._createEvent(name, detail, /* cancelable = */ false);
-    this._frameElement.dispatchEvent(evt);
-  },
-
-  _handleShowModalPrompt(data) {
-    // Fire a showmodalprmopt event on the iframe.  When this method is called,
-    // the child is spinning in a nested event loop waiting for an
-    // unblock-modal-prompt message.
-    //
-    // If the embedder calls preventDefault() on the showmodalprompt event,
-    // we'll block the child until event.detail.unblock() is called.
-    //
-    // Otherwise, if preventDefault() is not called, we'll send the
-    // unblock-modal-prompt message to the child as soon as the event is done
-    // dispatching.
-
-    let detail = data.json;
-    debug("handleShowPrompt " + JSON.stringify(detail));
-
-    // Strip off the windowID property from the object we send along in the
-    // event.
-    let windowID = detail.windowID;
-    delete detail.windowID;
-    debug("Event will have detail: " + JSON.stringify(detail));
-    let evt = this._createEvent(
-      "showmodalprompt",
-      detail,
-      /* cancelable = */ true
-    );
-
-    let self = this;
-    let unblockMsgSent = false;
-    function sendUnblockMsg() {
-      if (unblockMsgSent) {
-        return;
-      }
-      unblockMsgSent = true;
-
-      // We don't need to sanitize evt.detail.returnValue (e.g. converting the
-      // return value of confirm() to a boolean); Gecko does that for us.
-
-      let data = { windowID, returnValue: evt.detail.returnValue };
-      self._sendAsyncMsg("unblock-modal-prompt", data);
-    }
-
-    Cu.exportFunction(sendUnblockMsg, evt.detail, { defineAs: "unblock" });
-
-    this._frameElement.dispatchEvent(evt);
-
-    if (!evt.defaultPrevented) {
-      // Unblock the inner frame immediately.  Otherwise we'll unblock upon
-      // evt.detail.unblock().
-      sendUnblockMsg();
-    }
-  },
-
-  _createEvent(evtName, detail, cancelable) {
-    // This will have to change if we ever want to send a CustomEvent with null
-    // detail.  For now, it's OK.
-    if (detail !== undefined && detail !== null) {
-      detail = Cu.cloneInto(detail, this._window);
-      return new this._window.CustomEvent("mozbrowser" + evtName, {
-        bubbles: true,
-        cancelable,
-        detail,
-      });
-    }
-
-    return new this._window.Event("mozbrowser" + evtName, {
-      bubbles: true,
-      cancelable,
-    });
-  },
-
-  _handleOwnerEvent(evt) {
-    switch (evt.type) {
-      case "visibilitychange":
-        this._ownerVisibilityChange();
-        break;
-    }
-  },
-
-  /**
-   * Called when the visibility of the window which owns this iframe changes.
-   */
-  _ownerVisibilityChange() {
-    let bc = this._frameLoader?.browsingContext;
-    if (bc) {
-      bc.isActive = !this._window.document.hidden;
-    }
-  },
-};
-
-var EXPORTED_SYMBOLS = ["BrowserElementParent"];
diff --git a/dom/browser-element/BrowserElementPromptService.jsm b/dom/browser-element/BrowserElementPromptService.jsm
deleted file mode 100644
index dd73004959..0000000000
--- a/dom/browser-element/BrowserElementPromptService.jsm
+++ /dev/null
@@ -1,720 +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/. */
-/* vim: set ft=javascript : */
-
-"use strict";
-
-var Cm = Components.manager.QueryInterface(Ci.nsIComponentRegistrar);
-
-var EXPORTED_SYMBOLS = ["BrowserElementPromptService"];
-
-function debug(msg) {
-  // dump("BrowserElementPromptService - " + msg + "\n");
-}
-
-function BrowserElementPrompt(win, browserElementChild) {
-  this._win = win;
-  this._browserElementChild = browserElementChild;
-}
-
-BrowserElementPrompt.prototype = {
-  QueryInterface: ChromeUtils.generateQI(["nsIPrompt"]),
-
-  alert(title, text) {
-    this._browserElementChild.showModalPrompt(this._win, {
-      promptType: "alert",
-      title,
-      message: text,
-      returnValue: undefined,
-    });
-  },
-
-  alertCheck(title, text, checkMsg, checkState) {
-    // Treat this like a normal alert() call, ignoring the checkState.  The
-    // front-end can do its own suppression of the alert() if it wants.
-    this.alert(title, text);
-  },
-
-  confirm(title, text) {
-    return this._browserElementChild.showModalPrompt(this._win, {
-      promptType: "confirm",
-      title,
-      message: text,
-      returnValue: undefined,
-    });
-  },
-
-  confirmCheck(title, text, checkMsg, checkState) {
-    return this.confirm(title, text);
-  },
-
-  // Each button is described by an object with the following schema
-  // {
-  //   string messageType,  // 'builtin' or 'custom'
-  //   string message, // 'ok', 'cancel', 'yes', 'no', 'save', 'dontsave',
-  //                   // 'revert' or a string from caller if messageType was 'custom'.
-  // }
-  //
-  // Expected result from embedder:
-  // {
-  //   int button, // Index of the button that user pressed.
-  //   boolean checked, // True if the check box is checked.
-  // }
-  confirmEx(
-    title,
-    text,
-    buttonFlags,
-    button0Title,
-    button1Title,
-    button2Title,
-    checkMsg,
-    checkState
-  ) {
-    let buttonProperties = this._buildConfirmExButtonProperties(
-      buttonFlags,
-      button0Title,
-      button1Title,
-      button2Title
-    );
-    let defaultReturnValue = { selectedButton: buttonProperties.defaultButton };
-    if (checkMsg) {
-      defaultReturnValue.checked = checkState.value;
-    }
-    let ret = this._browserElementChild.showModalPrompt(this._win, {
-      promptType: "custom-prompt",
-      title,
-      message: text,
-      defaultButton: buttonProperties.defaultButton,
-      buttons: buttonProperties.buttons,
-      showCheckbox: !!checkMsg,
-      checkboxMessage: checkMsg,
-      checkboxCheckedByDefault: !!checkState.value,
-      returnValue: defaultReturnValue,
-    });
-    if (checkMsg) {
-      checkState.value = ret.checked;
-    }
-    return buttonProperties.indexToButtonNumberMap[ret.selectedButton];
-  },
-
-  prompt(title, text, value, checkMsg, checkState) {
-    let rv = this._browserElementChild.showModalPrompt(this._win, {
-      promptType: "prompt",
-      title,
-      message: text,
-      initialValue: value.value,
-      returnValue: null,
-    });
-
-    value.value = rv;
-
-    // nsIPrompt::Prompt returns true if the user pressed "OK" at the prompt,
-    // and false if the user pressed "Cancel".
-    //
-    // BrowserElementChild returns null for "Cancel" and returns the string the
-    // user entered otherwise.
-    return rv !== null;
-  },
-
-  promptUsernameAndPassword(title, text, username, password) {
-    throw Components.Exception("", Cr.NS_ERROR_NOT_IMPLEMENTED);
-  },
-
-  promptPassword(title, text, password) {
-    throw Components.Exception("", Cr.NS_ERROR_NOT_IMPLEMENTED);
-  },
-
-  select(title, text, aSelectList, aOutSelection) {
-    throw Components.Exception("", Cr.NS_ERROR_NOT_IMPLEMENTED);
-  },
-
-  _buildConfirmExButtonProperties(
-    buttonFlags,
-    button0Title,
-    button1Title,
-    button2Title
-  ) {
-    let r = {
-      defaultButton: -1,
-      buttons: [],
-      // This map is for translating array index to the button number that
-      // is recognized by Gecko. This shouldn't be exposed to embedder.
-      indexToButtonNumberMap: [],
-    };
-
-    let defaultButton = 0; // Default to Button 0.
-    if (buttonFlags & Ci.nsIPrompt.BUTTON_POS_1_DEFAULT) {
-      defaultButton = 1;
-    } else if (buttonFlags & Ci.nsIPrompt.BUTTON_POS_2_DEFAULT) {
-      defaultButton = 2;
-    }
-
-    // Properties of each button.
-    let buttonPositions = [
-      Ci.nsIPrompt.BUTTON_POS_0,
-      Ci.nsIPrompt.BUTTON_POS_1,
-      Ci.nsIPrompt.BUTTON_POS_2,
-    ];
-
-    function buildButton(buttonTitle, buttonNumber) {
-      let ret = {};
-      let buttonPosition = buttonPositions[buttonNumber];
-      let mask = 0xff * buttonPosition; // 8 bit mask
-      let titleType = (buttonFlags & mask) / buttonPosition;
-
-      ret.messageType = "builtin";
-      switch (titleType) {
-        case Ci.nsIPrompt.BUTTON_TITLE_OK:
-          ret.message = "ok";
-          break;
-        case Ci.nsIPrompt.BUTTON_TITLE_CANCEL:
-          ret.message = "cancel";
-          break;
-        case Ci.nsIPrompt.BUTTON_TITLE_YES:
-          ret.message = "yes";
-          break;
-        case Ci.nsIPrompt.BUTTON_TITLE_NO:
-          ret.message = "no";
-          break;
-        case Ci.nsIPrompt.BUTTON_TITLE_SAVE:
-          ret.message = "save";
-          break;
-        case Ci.nsIPrompt.BUTTON_TITLE_DONT_SAVE:
-          ret.message = "dontsave";
-          break;
-        case Ci.nsIPrompt.BUTTON_TITLE_REVERT:
-          ret.message = "revert";
-          break;
-        case Ci.nsIPrompt.BUTTON_TITLE_IS_STRING:
-          ret.message = buttonTitle;
-          ret.messageType = "custom";
-          break;
-        default:
-          // This button is not shown.
-          return;
-      }
-
-      // If this is the default button, set r.defaultButton to
-      // the index of this button in the array. This value is going to be
-      // exposed to the embedder.
-      if (defaultButton === buttonNumber) {
-        r.defaultButton = r.buttons.length;
-      }
-      r.buttons.push(ret);
-      r.indexToButtonNumberMap.push(buttonNumber);
-    }
-
-    buildButton(button0Title, 0);
-    buildButton(button1Title, 1);
-    buildButton(button2Title, 2);
-
-    // If defaultButton is still -1 here, it means the default button won't
-    // be shown.
-    if (r.defaultButton === -1) {
-      throw new Components.Exception(
-        "Default button won't be shown",
-        Cr.NS_ERROR_FAILURE
-      );
-    }
-
-    return r;
-  },
-};
-
-function BrowserElementAuthPrompt() {}
-
-BrowserElementAuthPrompt.prototype = {
-  QueryInterface: ChromeUtils.generateQI(["nsIAuthPrompt2"]),
-
-  promptAuth: function promptAuth(channel, level, authInfo) {
-    throw Components.Exception("", Cr.NS_ERROR_NOT_IMPLEMENTED);
-  },
-
-  asyncPromptAuth: function asyncPromptAuth(
-    channel,
-    callback,
-    context,
-    level,
-    authInfo
-  ) {
-    debug("asyncPromptAuth");
-
-    // The cases that we don't support now.
-    if (
-      authInfo.flags & Ci.nsIAuthInformation.AUTH_PROXY &&
-      authInfo.flags & Ci.nsIAuthInformation.ONLY_PASSWORD
-    ) {
-      throw Components.Exception("", Cr.NS_ERROR_FAILURE);
-    }
-
-    let frame = this._getFrameFromChannel(channel);
-    if (!frame) {
-      debug("Cannot get frame, asyncPromptAuth fail");
-      throw Components.Exception("", Cr.NS_ERROR_FAILURE);
-    }
-
-    let browserElementParent =
-      BrowserElementPromptService.getBrowserElementParentForFrame(frame);
-
-    if (!browserElementParent) {
-      debug("Failed to load browser element parent.");
-      throw Components.Exception("", Cr.NS_ERROR_FAILURE);
-    }
-
-    let consumer = {
-      QueryInterface: ChromeUtils.generateQI(["nsICancelable"]),
-      callback,
-      context,
-      cancel() {
-        this.callback.onAuthCancelled(this.context, false);
-        this.callback = null;
-        this.context = null;
-      },
-    };
-
-    let [hostname, httpRealm] = this._getAuthTarget(channel, authInfo);
-    let hashKey = level + "|" + hostname + "|" + httpRealm;
-    let asyncPrompt = this._asyncPrompts[hashKey];
-    if (asyncPrompt) {
-      asyncPrompt.consumers.push(consumer);
-      return consumer;
-    }
-
-    asyncPrompt = {
-      consumers: [consumer],
-      channel,
-      authInfo,
-      level,
-      inProgress: false,
-      browserElementParent,
-    };
-
-    this._asyncPrompts[hashKey] = asyncPrompt;
-    this._doAsyncPrompt();
-    return consumer;
-  },
-
-  // Utilities for nsIAuthPrompt2 ----------------
-
-  _asyncPrompts: {},
-  _asyncPromptInProgress: new WeakMap(),
-  _doAsyncPrompt() {
-    // Find the key of a prompt whose browser element parent does not have
-    // async prompt in progress.
-    let hashKey = null;
-    for (let key in this._asyncPrompts) {
-      let prompt = this._asyncPrompts[key];
-      if (!this._asyncPromptInProgress.get(prompt.browserElementParent)) {
-        hashKey = key;
-        break;
-      }
-    }
-
-    // Didn't find an available prompt, so just return.
-    if (!hashKey) {
-      return;
-    }
-
-    let prompt = this._asyncPrompts[hashKey];
-
-    this._asyncPromptInProgress.set(prompt.browserElementParent, true);
-    prompt.inProgress = true;
-
-    let self = this;
-    let callback = function (ok, username, password) {
-      debug(
-        "Async auth callback is called, ok = " + ok + ", username = " + username
-      );
-
-      // Here we got the username and password provided by embedder, or
-      // ok = false if the prompt was cancelled by embedder.
-      delete self._asyncPrompts[hashKey];
-      prompt.inProgress = false;
-      self._asyncPromptInProgress.delete(prompt.browserElementParent);
-
-      // Fill authentication information with username and password provided
-      // by user.
-      let flags = prompt.authInfo.flags;
-      if (username) {
-        if (flags & Ci.nsIAuthInformation.NEED_DOMAIN) {
-          // Domain is separated from username by a backslash
-          let idx = username.indexOf("\\");
-          if (idx == -1) {
-            prompt.authInfo.username = username;
-          } else {
-            prompt.authInfo.domain = username.substring(0, idx);
-            prompt.authInfo.username = username.substring(idx + 1);
-          }
-        } else {
-          prompt.authInfo.username = username;
-        }
-      }
-
-      if (password) {
-        prompt.authInfo.password = password;
-      }
-
-      for (let consumer of prompt.consumers) {
-        if (!consumer.callback) {
-          // Not having a callback means that consumer didn't provide it
-          // or canceled the notification.
-          continue;
-        }
-
-        try {
-          if (ok) {
-            debug("Ok, calling onAuthAvailable to finish auth");
-            consumer.callback.onAuthAvailable(
-              consumer.context,
-              prompt.authInfo
-            );
-          } else {
-            debug("Cancelled, calling onAuthCancelled to finish auth.");
-            consumer.callback.onAuthCancelled(consumer.context, true);
-          }
-        } catch (e) {
-          /* Throw away exceptions caused by callback */
-        }
-      }
-
-      // Process the next prompt, if one is pending.
-      self._doAsyncPrompt();
-    };
-
-    let runnable = {
-      run() {
-        // Call promptAuth of browserElementParent, to show the prompt.
-        prompt.browserElementParent.promptAuth(
-          self._createAuthDetail(prompt.channel, prompt.authInfo),
-          callback
-        );
-      },
-    };
-
-    Services.tm.dispatchToMainThread(runnable);
-  },
-
-  _getFrameFromChannel(channel) {
-    let loadContext = channel.notificationCallbacks.getInterface(
-      Ci.nsILoadContext
-    );
-    return loadContext.topFrameElement;
-  },
-
-  _createAuthDetail(channel, authInfo) {
-    let [hostname, httpRealm] = this._getAuthTarget(channel, authInfo);
-    return {
-      host: hostname,
-      path: channel.URI.pathQueryRef,
-      realm: httpRealm,
-      username: authInfo.username,
-      isProxy: !!(authInfo.flags & Ci.nsIAuthInformation.AUTH_PROXY),
-      isOnlyPassword: !!(authInfo.flags & Ci.nsIAuthInformation.ONLY_PASSWORD),
-    };
-  },
-
-  // The code is taken from nsLoginManagerPrompter.js, with slight
-  // modification for parameter name consistency here.
-  _getAuthTarget(channel, authInfo) {
-    let hostname, realm;
-
-    // If our proxy is demanding authentication, don't use the
-    // channel's actual destination.
-    if (authInfo.flags & Ci.nsIAuthInformation.AUTH_PROXY) {
-      if (!(channel instanceof Ci.nsIProxiedChannel)) {
-        throw new Error("proxy auth needs nsIProxiedChannel");
-      }
-
-      let info = channel.proxyInfo;
-      if (!info) {
-        throw new Error("proxy auth needs nsIProxyInfo");
-      }
-
-      // Proxies don't have a scheme, but we'll use "moz-proxy://"
-      // so that it's more obvious what the login is for.
-      var idnService = Cc["@mozilla.org/network/idn-service;1"].getService(
-        Ci.nsIIDNService
-      );
-      hostname =
-        "moz-proxy://" +
-        idnService.convertUTF8toACE(info.host) +
-        ":" +
-        info.port;
-      realm = authInfo.realm;
-      if (!realm) {
-        realm = hostname;
-      }
-
-      return [hostname, realm];
-    }
-
-    hostname = this._getFormattedHostname(channel.URI);
-
-    // If a HTTP WWW-Authenticate header specified a realm, that value
-    // will be available here. If it wasn't set or wasn't HTTP, we'll use
-    // the formatted hostname instead.
-    realm = authInfo.realm;
-    if (!realm) {
-      realm = hostname;
-    }
-
-    return [hostname, realm];
-  },
-
-  /**
-   * Strip out things like userPass and path for display.
-   */
-  _getFormattedHostname(uri) {
-    return uri.scheme + "://" + uri.hostPort;
-  },
-};
-
-function AuthPromptWrapper(oldImpl, browserElementImpl) {
-  this._oldImpl = oldImpl;
-  this._browserElementImpl = browserElementImpl;
-}
-
-AuthPromptWrapper.prototype = {
-  QueryInterface: ChromeUtils.generateQI(["nsIAuthPrompt2"]),
-  promptAuth(channel, level, authInfo) {
-    if (this._canGetParentElement(channel)) {
-      return this._browserElementImpl.promptAuth(channel, level, authInfo);
-    }
-    return this._oldImpl.promptAuth(channel, level, authInfo);
-  },
-
-  asyncPromptAuth(channel, callback, context, level, authInfo) {
-    if (this._canGetParentElement(channel)) {
-      return this._browserElementImpl.asyncPromptAuth(
-        channel,
-        callback,
-        context,
-        level,
-        authInfo
-      );
-    }
-    return this._oldImpl.asyncPromptAuth(
-      channel,
-      callback,
-      context,
-      level,
-      authInfo
-    );
-  },
-
-  _canGetParentElement(channel) {
-    try {
-      let context = channel.notificationCallbacks.getInterface(
-        Ci.nsILoadContext
-      );
-      let frame = context.topFrameElement;
-      if (!frame) {
-        return false;
-      }
-
-      if (!BrowserElementPromptService.getBrowserElementParentForFrame(frame)) {
-        return false;
-      }
-
-      return true;
-    } catch (e) {
-      return false;
-    }
-  },
-};
-
-function BrowserElementPromptFactory(toWrap) {
-  this._wrapped = toWrap;
-}
-
-BrowserElementPromptFactory.prototype = {
-  classID: Components.ID("{24f3d0cf-e417-4b85-9017-c9ecf8bb1299}"),
-  QueryInterface: ChromeUtils.generateQI(["nsIPromptFactory"]),
-
-  _mayUseNativePrompt() {
-    try {
-      return Services.prefs.getBoolPref("browser.prompt.allowNative");
-    } catch (e) {
-      // This properity is default to true.
-      return true;
-    }
-  },
-
-  _getNativePromptIfAllowed(win, iid, err) {
-    if (this._mayUseNativePrompt()) {
-      return this._wrapped.getPrompt(win, iid);
-    }
-
-    // Not allowed, throw an exception.
-    throw err;
-  },
-
-  getPrompt(win, iid) {
-    // It is possible for some object to get a prompt without passing
-    // valid reference of window, like nsNSSComponent. In such case, we
-    // should just fall back to the native prompt service
-    if (!win) {
-      return this._getNativePromptIfAllowed(win, iid, Cr.NS_ERROR_INVALID_ARG);
-    }
-
-    if (
-      iid.number != Ci.nsIPrompt.number &&
-      iid.number != Ci.nsIAuthPrompt2.number
-    ) {
-      debug(
-        "We don't recognize the requested IID (" +
-          iid +
-          ", " +
-          "allowed IID: " +
-          "nsIPrompt=" +
-          Ci.nsIPrompt +
-          ", " +
-          "nsIAuthPrompt2=" +
-          Ci.nsIAuthPrompt2 +
-          ")"
-      );
-      return this._getNativePromptIfAllowed(win, iid, Cr.NS_ERROR_INVALID_ARG);
-    }
-
-    // Try to find a BrowserElementChild for the window.
-    let browserElementChild =
-      BrowserElementPromptService.getBrowserElementChildForWindow(win);
-
-    if (iid.number === Ci.nsIAuthPrompt2.number) {
-      debug("Caller requests an instance of nsIAuthPrompt2.");
-
-      if (browserElementChild) {
-        // If we are able to get a BrowserElementChild, it means that
-        // the auth prompt is for a mozbrowser. Therefore we don't need to
-        // fall back.
-        return new BrowserElementAuthPrompt().QueryInterface(iid);
-      }
-
-      // Because nsIAuthPrompt2 is called in parent process. If caller
-      // wants nsIAuthPrompt2 and we cannot get BrowserElementchild,
-      // it doesn't mean that we should fallback. It is possible that we can
-      // get the BrowserElementParent from nsIChannel that passed to
-      // functions of nsIAuthPrompt2.
-      if (this._mayUseNativePrompt()) {
-        return new AuthPromptWrapper(
-          this._wrapped.getPrompt(win, iid),
-          new BrowserElementAuthPrompt().QueryInterface(iid)
-        ).QueryInterface(iid);
-      }
-      // Falling back is not allowed, so we don't need wrap the
-      // BrowserElementPrompt.
-      return new BrowserElementAuthPrompt().QueryInterface(iid);
-    }
-
-    if (!browserElementChild) {
-      debug(
-        "We can't find a browserElementChild for " + win + ", " + win.location
-      );
-      return this._getNativePromptIfAllowed(win, iid, Cr.NS_ERROR_FAILURE);
-    }
-
-    debug("Returning wrapped getPrompt for " + win);
-    return new BrowserElementPrompt(win, browserElementChild).QueryInterface(
-      iid
-    );
-  },
-};
-
-var BrowserElementPromptService = {
-  QueryInterface: ChromeUtils.generateQI([
-    "nsIObserver",
-    "nsISupportsWeakReference",
-  ]),
-
-  _initialized: false,
-
-  _init() {
-    if (this._initialized) {
-      return;
-    }
-
-    this._initialized = true;
-    this._browserElementParentMap = new WeakMap();
-
-    Services.obs.addObserver(
-      this,
-      "outer-window-destroyed",
-      /* ownsWeak = */ true
-    );
-
-    // Wrap the existing @mozilla.org/prompter;1 implementation.
-    var contractID = "@mozilla.org/prompter;1";
-    var oldCID = Cm.contractIDToCID(contractID);
-    var newCID = BrowserElementPromptFactory.prototype.classID;
-    var oldFactory = Cm.getClassObject(Cc[contractID], Ci.nsIFactory);
-
-    if (oldCID == newCID) {
-      debug("WARNING: Wrapped prompt factory is already installed!");
-      return;
-    }
-
-    var oldInstance = oldFactory.createInstance(null, Ci.nsIPromptFactory);
-    var newInstance = new BrowserElementPromptFactory(oldInstance);
-
-    var newFactory = {
-      createInstance(iid) {
-        return newInstance.QueryInterface(iid);
-      },
-    };
-    Cm.registerFactory(
-      newCID,
-      "BrowserElementPromptService's prompter;1 wrapper",
-      contractID,
-      newFactory
-    );
-
-    debug("Done installing new prompt factory.");
-  },
-
-  _getOuterWindowID(win) {
-    return win.docShell.outerWindowID;
-  },
-
-  _browserElementChildMap: {},
-  mapWindowToBrowserElementChild(win, browserElementChild) {
-    this._browserElementChildMap[this._getOuterWindowID(win)] =
-      browserElementChild;
-  },
-  unmapWindowToBrowserElementChild(win) {
-    delete this._browserElementChildMap[this._getOuterWindowID(win)];
-  },
-
-  getBrowserElementChildForWindow(win) {
-    // We only have a mapping for <iframe mozbrowser>s, not their inner
-    // <iframes>, so we look up win.top below.  window.top (when called from
-    // script) respects <iframe mozbrowser> boundaries.
-    return this._browserElementChildMap[this._getOuterWindowID(win.top)];
-  },
-
-  mapFrameToBrowserElementParent(frame, browserElementParent) {
-    this._browserElementParentMap.set(frame, browserElementParent);
-  },
-
-  getBrowserElementParentForFrame(frame) {
-    return this._browserElementParentMap.get(frame);
-  },
-
-  _observeOuterWindowDestroyed(outerWindowID) {
-    let id = outerWindowID.QueryInterface(Ci.nsISupportsPRUint64).data;
-    debug("observeOuterWindowDestroyed " + id);
-    delete this._browserElementChildMap[outerWindowID.data];
-  },
-
-  observe(subject, topic, data) {
-    switch (topic) {
-      case "outer-window-destroyed":
-        this._observeOuterWindowDestroyed(subject);
-        break;
-      default:
-        debug("Observed unexpected topic " + topic);
-    }
-  },
-};
-
-BrowserElementPromptService._init();
diff --git a/dom/browser-element/components.conf b/dom/browser-element/components.conf
deleted file mode 100644
index a29f7dc66a..0000000000
--- a/dom/browser-element/components.conf
+++ /dev/null
@@ -1,14 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-Classes = [
-    {
-        'cid': '{9f171ac4-0939-4ef8-b360-3408aedc3060}',
-        'contract_ids': ['@mozilla.org/dom/browser-element-api;1'],
-        'jsm': 'resource://gre/modules/BrowserElementParent.jsm',
-        'constructor': 'BrowserElementParent',
-    },
-]
diff --git a/dom/browser-element/moz.build b/dom/browser-element/moz.build
deleted file mode 100644
index 1f83fbd436..0000000000
--- a/dom/browser-element/moz.build
+++ /dev/null
@@ -1,37 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# 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/.
-
-with Files("**"):
-    BUG_COMPONENT = ("Core", "DOM: Core & HTML")
-
-XPIDL_SOURCES += [
-    "nsIBrowserElementAPI.idl",
-]
-
-XPIDL_MODULE = "browser-element"
-
-EXTRA_JS_MODULES += [
-    "BrowserElementParent.jsm",
-    "BrowserElementPromptService.jsm",
-]
-
-XPCOM_MANIFESTS += [
-    "components.conf",
-]
-
-LOCAL_INCLUDES += [
-    "/dom/html",
-]
-
-include("/ipc/chromium/chromium-config.mozbuild")
-
-FINAL_LIBRARY = "xul"
-
-LOCAL_INCLUDES += [
-    "/dom/",
-    "/dom/base",
-    "/dom/ipc",
-]
diff --git a/dom/browser-element/nsIBrowserElementAPI.idl b/dom/browser-element/nsIBrowserElementAPI.idl
deleted file mode 100644
index 4aeba96be8..0000000000
--- a/dom/browser-element/nsIBrowserElementAPI.idl
+++ /dev/null
@@ -1,44 +0,0 @@
-/* -*- Mode: IDL; tab-width: 8; 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/. */
-
-#include "nsISupports.idl"
-
-webidl FrameLoader;
-
-%{C++
-#define BROWSER_ELEMENT_API_CONTRACTID "@mozilla.org/dom/browser-element-api;1"
-#define BROWSER_ELEMENT_API_CID                                 \
-    { 0x651db7e3, 0x1734, 0x4536,                               \
-      { 0xb1, 0x5a, 0x5b, 0x3a, 0xe6, 0x44, 0x13, 0x4c } }
-%}
-
-/**
- * Interface to the BrowserElementParent implementation. All methods
- * but setFrameLoader throw when the remote process is dead.
- */
-[scriptable, uuid(57758c10-6036-11e5-a837-0800200c9a66)]
-interface nsIBrowserElementAPI : nsISupports
-{
-  /**
-   * Notify frame scripts that support the API to destroy.
-   */
-  void destroyFrameScripts();
-
-  void setFrameLoader(in FrameLoader frameLoader);
-
-  void sendMouseEvent(in AString type,
-                      in uint32_t x,
-                      in uint32_t y,
-                      in uint32_t button,
-                      in uint32_t clickCount,
-                      in uint32_t mifiers);
-  void goBack();
-  void goForward();
-  void reload(in boolean hardReload);
-  void stop();
-  Promise getCanGoBack();
-  Promise getCanGoForward();
-};
-- 
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