Revert "Add Basilisk"

This reverts commit e72ef92b5bdc43cd2584198e2e54e951b70299e8.

1 files changed, 0 insertions, 1559 deletions

diff --git a/application/basilisk/components/downloads/DownloadsCommon.jsm b/application/basilisk/components/downloads/DownloadsCommon.jsm
deleted file mode 100644
index 674902096..000000000
--- a/application/basilisk/components/downloads/DownloadsCommon.jsm
+++ /dev/null
@@ -1,1559 +0,0 @@
-/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set ts=2 et sw=2 tw=80 filetype=javascript: */
-/* 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";
-
-this.EXPORTED_SYMBOLS = [
-  "DownloadsCommon",
-];
-
-/**
- * Handles the Downloads panel shared methods and data access.
- *
- * This file includes the following constructors and global objects:
- *
- * DownloadsCommon
- * This object is exposed directly to the consumers of this JavaScript module,
- * and provides shared methods for all the instances of the user interface.
- *
- * DownloadsData
- * Retrieves the list of past and completed downloads from the underlying
- * Downloads API data, and provides asynchronous notifications allowing
- * to build a consistent view of the available data.
- *
- * DownloadsIndicatorData
- * This object registers itself with DownloadsData as a view, and transforms the
- * notifications it receives into overall status data, that is then broadcast to
- * the registered download status indicators.
- */
-
-////////////////////////////////////////////////////////////////////////////////
-//// Globals
-
-const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
-
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-Cu.import("resource://gre/modules/Services.jsm");
-
-XPCOMUtils.defineLazyModuleGetter(this, "NetUtil",
-                                  "resource://gre/modules/NetUtil.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "PluralForm",
-                                  "resource://gre/modules/PluralForm.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "Downloads",
-                                  "resource://gre/modules/Downloads.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "DownloadUIHelper",
-                                  "resource://gre/modules/DownloadUIHelper.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "DownloadUtils",
-                                  "resource://gre/modules/DownloadUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "FileUtils",
-                                  "resource://gre/modules/FileUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "OS",
-                                  "resource://gre/modules/osfile.jsm")
-XPCOMUtils.defineLazyModuleGetter(this, "PlacesUtils",
-                                  "resource://gre/modules/PlacesUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
-                                  "resource://gre/modules/PrivateBrowsingUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "RecentWindow",
-                                  "resource:///modules/RecentWindow.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "Promise",
-                                  "resource://gre/modules/Promise.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "Task",
-                                  "resource://gre/modules/Task.jsm");
-
-XPCOMUtils.defineLazyGetter(this, "DownloadsLogger", () => {
-  let { ConsoleAPI } = Cu.import("resource://gre/modules/Console.jsm", {});
-  let consoleOptions = {
-    maxLogLevelPref: "browser.download.loglevel",
-    prefix: "Downloads"
-  };
-  return new ConsoleAPI(consoleOptions);
-});
-
-const nsIDM = Ci.nsIDownloadManager;
-
-const kDownloadsStringBundleUrl =
-  "chrome://browser/locale/downloads/downloads.properties";
-
-const kDownloadsStringsRequiringFormatting = {
-  sizeWithUnits: true,
-  shortTimeLeftSeconds: true,
-  shortTimeLeftMinutes: true,
-  shortTimeLeftHours: true,
-  shortTimeLeftDays: true,
-  statusSeparator: true,
-  statusSeparatorBeforeNumber: true,
-  fileExecutableSecurityWarning: true
-};
-
-const kDownloadsStringsRequiringPluralForm = {
-  otherDownloads3: true
-};
-
-const kPartialDownloadSuffix = ".part";
-
-const kPrefBranch = Services.prefs.getBranch("browser.download.");
-
-var PrefObserver = {
-  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
-                                         Ci.nsISupportsWeakReference]),
-  getPref(name) {
-    try {
-      switch (typeof this.prefs[name]) {
-        case "boolean":
-          return kPrefBranch.getBoolPref(name);
-      }
-    } catch (ex) { }
-    return this.prefs[name];
-  },
-  observe(aSubject, aTopic, aData) {
-    if (this.prefs.hasOwnProperty(aData)) {
-      delete this[aData];
-      return this[aData] = this.getPref(aData);
-    }
-  },
-  register(prefs) {
-    this.prefs = prefs;
-    kPrefBranch.addObserver("", this, true);
-    for (let key in prefs) {
-      let name = key;
-      XPCOMUtils.defineLazyGetter(this, name, function () {
-        return PrefObserver.getPref(name);
-      });
-    }
-  },
-};
-
-PrefObserver.register({
-  // prefName: defaultValue
-  animateNotifications: true,
-  showPanelDropmarker: true,
-});
-
-
-////////////////////////////////////////////////////////////////////////////////
-//// DownloadsCommon
-
-/**
- * This object is exposed directly to the consumers of this JavaScript module,
- * and provides shared methods for all the instances of the user interface.
- */
-this.DownloadsCommon = {
-  ATTENTION_NONE: "",
-  ATTENTION_SUCCESS: "success",
-  ATTENTION_WARNING: "warning",
-  ATTENTION_SEVERE: "severe",
-
-  /**
-   * Returns an object whose keys are the string names from the downloads string
-   * bundle, and whose values are either the translated strings or functions
-   * returning formatted strings.
-   */
-  get strings() {
-    let strings = {};
-    let sb = Services.strings.createBundle(kDownloadsStringBundleUrl);
-    let enumerator = sb.getSimpleEnumeration();
-    while (enumerator.hasMoreElements()) {
-      let string = enumerator.getNext().QueryInterface(Ci.nsIPropertyElement);
-      let stringName = string.key;
-      if (stringName in kDownloadsStringsRequiringFormatting) {
-        strings[stringName] = function () {
-          // Convert "arguments" to a real array before calling into XPCOM.
-          return sb.formatStringFromName(stringName,
-                                         Array.slice(arguments, 0),
-                                         arguments.length);
-        };
-      } else if (stringName in kDownloadsStringsRequiringPluralForm) {
-        strings[stringName] = function (aCount) {
-          // Convert "arguments" to a real array before calling into XPCOM.
-          let formattedString = sb.formatStringFromName(stringName,
-                                         Array.slice(arguments, 0),
-                                         arguments.length);
-          return PluralForm.get(aCount, formattedString);
-        };
-      } else {
-        strings[stringName] = string.value;
-      }
-    }
-    delete this.strings;
-    return this.strings = strings;
-  },
-
-  /**
-   * Generates a very short string representing the given time left.
-   *
-   * @param aSeconds
-   *        Value to be formatted.  It represents the number of seconds, it must
-   *        be positive but does not need to be an integer.
-   *
-   * @return Formatted string, for example "30s" or "2h".  The returned value is
-   *         maximum three characters long, at least in English.
-   */
-  formatTimeLeft(aSeconds) {
-    // Decide what text to show for the time
-    let seconds = Math.round(aSeconds);
-    if (!seconds) {
-      return "";
-    } else if (seconds <= 30) {
-      return DownloadsCommon.strings["shortTimeLeftSeconds"](seconds);
-    }
-    let minutes = Math.round(aSeconds / 60);
-    if (minutes < 60) {
-      return DownloadsCommon.strings["shortTimeLeftMinutes"](minutes);
-    }
-    let hours = Math.round(minutes / 60);
-    if (hours < 48) { // two days
-      return DownloadsCommon.strings["shortTimeLeftHours"](hours);
-    }
-    let days = Math.round(hours / 24);
-    return DownloadsCommon.strings["shortTimeLeftDays"](Math.min(days, 99));
-  },
-
-  /**
-   * Indicates whether we should show visual notification on the indicator
-   * when a download event is triggered.
-   */
-  get animateNotifications() {
-    return PrefObserver.animateNotifications;
-  },
-
-  /**
-   * Indicates whether we should show the dropmarker in the Downloads Panel.
-   */
-  get showPanelDropmarker() {
-    return PrefObserver.showPanelDropmarker;
-  },
-
-  /**
-   * Get access to one of the DownloadsData or PrivateDownloadsData objects,
-   * depending on the privacy status of the window in question.
-   *
-   * @param aWindow
-   *        The browser window which owns the download button.
-   */
-  getData(aWindow) {
-    if (PrivateBrowsingUtils.isContentWindowPrivate(aWindow)) {
-      return PrivateDownloadsData;
-    } else {
-      return DownloadsData;
-    }
-  },
-
-  /**
-   * Initializes the Downloads back-end and starts receiving events for both the
-   * private and non-private downloads data objects.
-   */
-  initializeAllDataLinks() {
-    DownloadsData.initializeDataLink();
-    PrivateDownloadsData.initializeDataLink();
-  },
-
-  /**
-   * Get access to one of the DownloadsIndicatorData or
-   * PrivateDownloadsIndicatorData objects, depending on the privacy status of
-   * the window in question.
-   */
-  getIndicatorData(aWindow) {
-    if (PrivateBrowsingUtils.isContentWindowPrivate(aWindow)) {
-      return PrivateDownloadsIndicatorData;
-    } else {
-      return DownloadsIndicatorData;
-    }
-  },
-
-  /**
-   * Returns a reference to the DownloadsSummaryData singleton - creating one
-   * in the process if one hasn't been instantiated yet.
-   *
-   * @param aWindow
-   *        The browser window which owns the download button.
-   * @param aNumToExclude
-   *        The number of items on the top of the downloads list to exclude
-   *        from the summary.
-   */
-  getSummary(aWindow, aNumToExclude) {
-    if (PrivateBrowsingUtils.isContentWindowPrivate(aWindow)) {
-      if (this._privateSummary) {
-        return this._privateSummary;
-      }
-      return this._privateSummary = new DownloadsSummaryData(true, aNumToExclude);
-    } else {
-      if (this._summary) {
-        return this._summary;
-      }
-      return this._summary = new DownloadsSummaryData(false, aNumToExclude);
-    }
-  },
-  _summary: null,
-  _privateSummary: null,
-
-  /**
-   * Returns the legacy state integer value for the provided Download object.
-   */
-  stateOfDownload(download) {
-    // Collapse state using the correct priority.
-    if (!download.stopped) {
-      return nsIDM.DOWNLOAD_DOWNLOADING;
-    }
-    if (download.succeeded) {
-      return nsIDM.DOWNLOAD_FINISHED;
-    }
-    if (download.error) {
-      if (download.error.becauseBlockedByParentalControls) {
-        return nsIDM.DOWNLOAD_BLOCKED_PARENTAL;
-      }
-      if (download.error.becauseBlockedByReputationCheck) {
-        return nsIDM.DOWNLOAD_DIRTY;
-      }
-      return nsIDM.DOWNLOAD_FAILED;
-    }
-    if (download.canceled) {
-      if (download.hasPartialData) {
-        return nsIDM.DOWNLOAD_PAUSED;
-      }
-      return nsIDM.DOWNLOAD_CANCELED;
-    }
-    return nsIDM.DOWNLOAD_NOTSTARTED;
-  },
-
-  /**
-   * Helper function required because the Downloads Panel and the Downloads View
-   * don't share the controller yet.
-   */
-  removeAndFinalizeDownload(download) {
-    Downloads.getList(Downloads.ALL)
-             .then(list => list.remove(download))
-             .then(() => download.finalize(true))
-             .catch(Cu.reportError);
-  },
-
-  /**
-   * Given an iterable collection of Download objects, generates and returns
-   * statistics about that collection.
-   *
-   * @param downloads An iterable collection of Download objects.
-   *
-   * @return Object whose properties are the generated statistics. Currently,
-   *         we return the following properties:
-   *
-   *         numActive       : The total number of downloads.
-   *         numPaused       : The total number of paused downloads.
-   *         numDownloading  : The total number of downloads being downloaded.
-   *         totalSize       : The total size of all downloads once completed.
-   *         totalTransferred: The total amount of transferred data for these
-   *                           downloads.
-   *         slowestSpeed    : The slowest download rate.
-   *         rawTimeLeft     : The estimated time left for the downloads to
-   *                           complete.
-   *         percentComplete : The percentage of bytes successfully downloaded.
-   */
-  summarizeDownloads(downloads) {
-    let summary = {
-      numActive: 0,
-      numPaused: 0,
-      numDownloading: 0,
-      totalSize: 0,
-      totalTransferred: 0,
-      // slowestSpeed is Infinity so that we can use Math.min to
-      // find the slowest speed. We'll set this to 0 afterwards if
-      // it's still at Infinity by the time we're done iterating all
-      // download.
-      slowestSpeed: Infinity,
-      rawTimeLeft: -1,
-      percentComplete: -1
-    }
-
-    for (let download of downloads) {
-      summary.numActive++;
-
-      if (!download.stopped) {
-        summary.numDownloading++;
-        if (download.hasProgress && download.speed > 0) {
-          let sizeLeft = download.totalBytes - download.currentBytes;
-          summary.rawTimeLeft = Math.max(summary.rawTimeLeft,
-                                         sizeLeft / download.speed);
-          summary.slowestSpeed = Math.min(summary.slowestSpeed,
-                                          download.speed);
-        }
-      } else if (download.canceled && download.hasPartialData) {
-        summary.numPaused++;
-      }
-
-      // Only add to total values if we actually know the download size.
-      if (download.succeeded) {
-        summary.totalSize += download.target.size;
-        summary.totalTransferred += download.target.size;
-      } else if (download.hasProgress) {
-        summary.totalSize += download.totalBytes;
-        summary.totalTransferred += download.currentBytes;
-      }
-    }
-
-    if (summary.totalSize != 0) {
-      summary.percentComplete = (summary.totalTransferred /
-                                 summary.totalSize) * 100;
-    }
-
-    if (summary.slowestSpeed == Infinity) {
-      summary.slowestSpeed = 0;
-    }
-
-    return summary;
-  },
-
-  /**
-   * If necessary, smooths the estimated number of seconds remaining for one
-   * or more downloads to complete.
-   *
-   * @param aSeconds
-   *        Current raw estimate on number of seconds left for one or more
-   *        downloads. This is a floating point value to help get sub-second
-   *        accuracy for current and future estimates.
-   */
-  smoothSeconds(aSeconds, aLastSeconds) {
-    // We apply an algorithm similar to the DownloadUtils.getTimeLeft function,
-    // though tailored to a single time estimation for all downloads.  We never
-    // apply something if the new value is less than half the previous value.
-    let shouldApplySmoothing = aLastSeconds >= 0 &&
-                               aSeconds > aLastSeconds / 2;
-    if (shouldApplySmoothing) {
-      // Apply hysteresis to favor downward over upward swings.  Trust only 30%
-      // of the new value if lower, and 10% if higher (exponential smoothing).
-      let diff = aSeconds - aLastSeconds;
-      aSeconds = aLastSeconds + (diff < 0 ? .3 : .1) * diff;
-
-      // If the new time is similar, reuse something close to the last time
-      // left, but subtract a little to provide forward progress.
-      diff = aSeconds - aLastSeconds;
-      let diffPercent = diff / aLastSeconds * 100;
-      if (Math.abs(diff) < 5 || Math.abs(diffPercent) < 5) {
-        aSeconds = aLastSeconds - (diff < 0 ? .4 : .2);
-      }
-    }
-
-    // In the last few seconds of downloading, we are always subtracting and
-    // never adding to the time left.  Ensure that we never fall below one
-    // second left until all downloads are actually finished.
-    return aLastSeconds = Math.max(aSeconds, 1);
-  },
-
-  /**
-   * Opens a downloaded file.
-   *
-   * @param aFile
-   *        the downloaded file to be opened.
-   * @param aMimeInfo
-   *        the mime type info object.  May be null.
-   * @param aOwnerWindow
-   *        the window with which this action is associated.
-   */
-  openDownloadedFile(aFile, aMimeInfo, aOwnerWindow) {
-    if (!(aFile instanceof Ci.nsIFile)) {
-      throw new Error("aFile must be a nsIFile object");
-    }
-    if (aMimeInfo && !(aMimeInfo instanceof Ci.nsIMIMEInfo)) {
-      throw new Error("Invalid value passed for aMimeInfo");
-    }
-    if (!(aOwnerWindow instanceof Ci.nsIDOMWindow)) {
-      throw new Error("aOwnerWindow must be a dom-window object");
-    }
-
-#ifdef XP_WIN
-    let isWindowsExe = aFile.leafName.toLowerCase().endsWith(".exe");
-#else
-    let isWindowsExe = false;
-#endif
-
-    let promiseShouldLaunch;
-    // Don't prompt on Windows for .exe since there will be a native prompt.
-    if (aFile.isExecutable() && !isWindowsExe) {
-      // We get a prompter for the provided window here, even though anchoring
-      // to the most recently active window should work as well.
-      promiseShouldLaunch =
-        DownloadUIHelper.getPrompter(aOwnerWindow)
-                        .confirmLaunchExecutable(aFile.path);
-    } else {
-      promiseShouldLaunch = Promise.resolve(true);
-    }
-
-    promiseShouldLaunch.then(shouldLaunch => {
-      if (!shouldLaunch) {
-        return;
-      }
-
-      // Actually open the file.
-      try {
-        if (aMimeInfo && aMimeInfo.preferredAction == aMimeInfo.useHelperApp) {
-          aMimeInfo.launchWithFile(aFile);
-          return;
-        }
-      } catch (ex) { }
-
-      // If either we don't have the mime info, or the preferred action failed,
-      // attempt to launch the file directly.
-      try {
-        aFile.launch();
-      } catch (ex) {
-        // If launch fails, try sending it through the system's external "file:"
-        // URL handler.
-        Cc["@mozilla.org/uriloader/external-protocol-service;1"]
-          .getService(Ci.nsIExternalProtocolService)
-          .loadUrl(NetUtil.newURI(aFile));
-      }
-    }).then(null, Cu.reportError);
-  },
-
-  /**
-   * Show a downloaded file in the system file manager.
-   *
-   * @param aFile
-   *        a downloaded file.
-   */
-  showDownloadedFile(aFile) {
-    if (!(aFile instanceof Ci.nsIFile)) {
-      throw new Error("aFile must be a nsIFile object");
-    }
-    try {
-      // Show the directory containing the file and select the file.
-      aFile.reveal();
-    } catch (ex) {
-      // If reveal fails for some reason (e.g., it's not implemented on unix
-      // or the file doesn't exist), try using the parent if we have it.
-      let parent = aFile.parent;
-      if (parent) {
-        this.showDirectory(parent);
-      }
-    }
-  },
-
-  /**
-   * Show the specified folder in the system file manager.
-   *
-   * @param aDirectory
-   *        a directory to be opened with system file manager.
-   */
-  showDirectory(aDirectory) {
-    if (!(aDirectory instanceof Ci.nsIFile)) {
-      throw new Error("aDirectory must be a nsIFile object");
-    }
-    try {
-      aDirectory.launch();
-    } catch (ex) {
-      // If launch fails (probably because it's not implemented), let
-      // the OS handler try to open the directory.
-      Cc["@mozilla.org/uriloader/external-protocol-service;1"]
-        .getService(Ci.nsIExternalProtocolService)
-        .loadUrl(NetUtil.newURI(aDirectory));
-    }
-  },
-
-  /**
-   * Displays an alert message box which asks the user if they want to
-   * unblock the downloaded file or not.
-   *
-   * @param options
-   *        An object with the following properties:
-   *        {
-   *          verdict:
-   *            The detailed reason why the download was blocked, according to
-   *            the "Downloads.Error.BLOCK_VERDICT_" constants. If an unknown
-   *            reason is specified, "Downloads.Error.BLOCK_VERDICT_MALWARE" is
-   *            assumed.
-   *          window:
-   *            The window with which this action is associated.
-   *          dialogType:
-   *            String that determines which actions are available:
-   *             - "unblock" to offer just "unblock".
-   *             - "chooseUnblock" to offer "unblock" and "confirmBlock".
-   *             - "chooseOpen" to offer "open" and "confirmBlock".
-   *        }
-   *
-   * @return {Promise}
-   * @resolves String representing the action that should be executed:
-   *            - "open" to allow the download and open the file.
-   *            - "unblock" to allow the download without opening the file.
-   *            - "confirmBlock" to delete the blocked data permanently.
-   *            - "cancel" to do nothing and cancel the operation.
-   */
-  confirmUnblockDownload: Task.async(function* ({ verdict, window,
-                                                  dialogType }) {
-    let s = DownloadsCommon.strings;
-
-    // All the dialogs have an action button and a cancel button, while only
-    // some of them have an additonal button to remove the file. The cancel
-    // button must always be the one at BUTTON_POS_1 because this is the value
-    // returned by confirmEx when using ESC or closing the dialog (bug 345067).
-    let title = s.unblockHeaderUnblock;
-    let firstButtonText = s.unblockButtonUnblock;
-    let firstButtonAction = "unblock";
-    let buttonFlags =
-        (Ci.nsIPrompt.BUTTON_TITLE_IS_STRING * Ci.nsIPrompt.BUTTON_POS_0) +
-        (Ci.nsIPrompt.BUTTON_TITLE_CANCEL * Ci.nsIPrompt.BUTTON_POS_1);
-
-    switch (dialogType) {
-      case "unblock":
-        // Use only the unblock action. The default is to cancel.
-        buttonFlags += Ci.nsIPrompt.BUTTON_POS_1_DEFAULT;
-        break;
-      case "chooseUnblock":
-        // Use the unblock and remove file actions. The default is remove file.
-        buttonFlags +=
-          (Ci.nsIPrompt.BUTTON_TITLE_IS_STRING * Ci.nsIPrompt.BUTTON_POS_2) +
-          Ci.nsIPrompt.BUTTON_POS_2_DEFAULT;
-        break;
-      case "chooseOpen":
-        // Use the unblock and open file actions. The default is open file.
-        title = s.unblockHeaderOpen;
-        firstButtonText = s.unblockButtonOpen;
-        firstButtonAction = "open";
-        buttonFlags +=
-          (Ci.nsIPrompt.BUTTON_TITLE_IS_STRING * Ci.nsIPrompt.BUTTON_POS_2) +
-          Ci.nsIPrompt.BUTTON_POS_0_DEFAULT;
-        break;
-      default:
-        Cu.reportError("Unexpected dialog type: " + dialogType);
-        return "cancel";
-    }
-
-    let message;
-    switch (verdict) {
-      case Downloads.Error.BLOCK_VERDICT_UNCOMMON:
-        message = s.unblockTypeUncommon2;
-        break;
-      case Downloads.Error.BLOCK_VERDICT_POTENTIALLY_UNWANTED:
-        message = s.unblockTypePotentiallyUnwanted2;
-        break;
-      default: // Assume Downloads.Error.BLOCK_VERDICT_MALWARE
-        message = s.unblockTypeMalware;
-        break;
-    }
-    message += "\n\n" + s.unblockTip2;
-
-    Services.ww.registerNotification(function onOpen(subj, topic) {
-      if (topic == "domwindowopened" && subj instanceof Ci.nsIDOMWindow) {
-        // Make sure to listen for "DOMContentLoaded" because it is fired
-        // before the "load" event.
-        subj.addEventListener("DOMContentLoaded", function onLoad() {
-          subj.removeEventListener("DOMContentLoaded", onLoad);
-          if (subj.document.documentURI ==
-              "chrome://global/content/commonDialog.xul") {
-            Services.ww.unregisterNotification(onOpen);
-            let dialog = subj.document.getElementById("commonDialog");
-            if (dialog) {
-              // Change the dialog to use a warning icon.
-              dialog.classList.add("alert-dialog");
-            }
-          }
-        });
-      }
-    });
-
-    let rv = Services.prompt.confirmEx(window, title, message, buttonFlags,
-                                       firstButtonText, null,
-                                       s.unblockButtonConfirmBlock, null, {});
-    return [firstButtonAction, "cancel", "confirmBlock"][rv];
-  }),
-};
-
-XPCOMUtils.defineLazyGetter(this.DownloadsCommon, "log", () => {
-  return DownloadsLogger.log.bind(DownloadsLogger);
-});
-XPCOMUtils.defineLazyGetter(this.DownloadsCommon, "error", () => {
-  return DownloadsLogger.error.bind(DownloadsLogger);
-});
-
-/**
- * Returns true if we are executing on Windows Vista or a later version.
- */
-XPCOMUtils.defineLazyGetter(DownloadsCommon, "isWinVistaOrHigher", function () {
-  let os = Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULRuntime).OS;
-  if (os != "WINNT") {
-    return false;
-  }
-  let sysInfo = Cc["@mozilla.org/system-info;1"].getService(Ci.nsIPropertyBag2);
-  return parseFloat(sysInfo.getProperty("version")) >= 6;
-});
-
-////////////////////////////////////////////////////////////////////////////////
-//// DownloadsData
-
-/**
- * Retrieves the list of past and completed downloads from the underlying
- * Download Manager data, and provides asynchronous notifications allowing to
- * build a consistent view of the available data.
- *
- * This object responds to real-time changes in the underlying Download Manager
- * data.  For example, the deletion of one or more downloads is notified through
- * the nsIObserver interface, while any state or progress change is notified
- * through the nsIDownloadProgressListener interface.
- *
- * Note that using this object does not automatically start the Download Manager
- * service.  Consumers will see an empty list of downloads until the service is
- * actually started.  This is useful to display a neutral progress indicator in
- * the main browser window until the autostart timeout elapses.
- *
- * Note that DownloadsData and PrivateDownloadsData are two equivalent singleton
- * objects, one accessing non-private downloads, and the other accessing private
- * ones.
- */
-function DownloadsDataCtor(aPrivate) {
-  this._isPrivate = aPrivate;
-
-  // Contains all the available Download objects and their integer state.
-  this.oldDownloadStates = new Map();
-
-  // Array of view objects that should be notified when the available download
-  // data changes.
-  this._views = [];
-}
-
-DownloadsDataCtor.prototype = {
-  /**
-   * Starts receiving events for current downloads.
-   */
-  initializeDataLink() {
-    if (!this._dataLinkInitialized) {
-      let promiseList = Downloads.getList(this._isPrivate ? Downloads.PRIVATE
-                                                          : Downloads.PUBLIC);
-      promiseList.then(list => list.addView(this)).then(null, Cu.reportError);
-      this._dataLinkInitialized = true;
-    }
-  },
-  _dataLinkInitialized: false,
-
-  /**
-   * Iterator for all the available Download objects. This is empty until the
-   * data has been loaded using the JavaScript API for downloads.
-   */
-  get downloads() {
-    return this.oldDownloadStates.keys();
-  },
-
-  /**
-   * True if there are finished downloads that can be removed from the list.
-   */
-  get canRemoveFinished() {
-    for (let download of this.downloads) {
-      // Stopped, paused, and failed downloads with partial data are removed.
-      if (download.stopped && !(download.canceled && download.hasPartialData)) {
-        return true;
-      }
-    }
-    return false;
-  },
-
-  /**
-   * Asks the back-end to remove finished downloads from the list.
-   */
-  removeFinished() {
-    let promiseList = Downloads.getList(this._isPrivate ? Downloads.PRIVATE
-                                                        : Downloads.PUBLIC);
-    promiseList.then(list => list.removeFinished())
-               .then(null, Cu.reportError);
-    let indicatorData = this._isPrivate ? PrivateDownloadsIndicatorData
-                                        : DownloadsIndicatorData;
-    indicatorData.attention = DownloadsCommon.ATTENTION_NONE;
-  },
-
-  //////////////////////////////////////////////////////////////////////////////
-  //// Integration with the asynchronous Downloads back-end
-
-  onDownloadAdded(download) {
-    // Download objects do not store the end time of downloads, as the Downloads
-    // API does not need to persist this information for all platforms. Once a
-    // download terminates on a Desktop browser, it becomes a history download,
-    // for which the end time is stored differently, as a Places annotation.
-    download.endTime = Date.now();
-
-    this.oldDownloadStates.set(download,
-                               DownloadsCommon.stateOfDownload(download));
-
-    for (let view of this._views) {
-      view.onDownloadAdded(download, true);
-    }
-  },
-
-  onDownloadChanged(download) {
-    let oldState = this.oldDownloadStates.get(download);
-    let newState = DownloadsCommon.stateOfDownload(download);
-    this.oldDownloadStates.set(download, newState);
-
-    if (oldState != newState) {
-      if (download.succeeded ||
-          (download.canceled && !download.hasPartialData) ||
-          download.error) {
-        // Store the end time that may be displayed by the views.
-        download.endTime = Date.now();
-
-        // This state transition code should actually be located in a Downloads
-        // API module (bug 941009).  Moreover, the fact that state is stored as
-        // annotations should be ideally hidden behind methods of
-        // nsIDownloadHistory (bug 830415).
-        if (!this._isPrivate) {
-          try {
-            let downloadMetaData = {
-              state: DownloadsCommon.stateOfDownload(download),
-              endTime: download.endTime,
-            };
-            if (download.succeeded) {
-              downloadMetaData.fileSize = download.target.size;
-            }
-            if (download.error && download.error.reputationCheckVerdict) {
-              downloadMetaData.reputationCheckVerdict =
-                download.error.reputationCheckVerdict;
-            }
-
-            PlacesUtils.annotations.setPageAnnotation(
-                          NetUtil.newURI(download.source.url),
-                          "downloads/metaData",
-                          JSON.stringify(downloadMetaData), 0,
-                          PlacesUtils.annotations.EXPIRE_WITH_HISTORY);
-          } catch (ex) {
-            Cu.reportError(ex);
-          }
-        }
-      }
-
-      for (let view of this._views) {
-        try {
-          view.onDownloadStateChanged(download);
-        } catch (ex) {
-          Cu.reportError(ex);
-        }
-      }
-
-      if (download.succeeded ||
-          (download.error && download.error.becauseBlocked)) {
-        this._notifyDownloadEvent("finish");
-      }
-    }
-
-    if (!download.newDownloadNotified) {
-      download.newDownloadNotified = true;
-      this._notifyDownloadEvent("start");
-    }
-
-    for (let view of this._views) {
-      view.onDownloadChanged(download);
-    }
-  },
-
-  onDownloadRemoved(download) {
-    this.oldDownloadStates.delete(download);
-
-    for (let view of this._views) {
-      view.onDownloadRemoved(download);
-    }
-  },
-
-  //////////////////////////////////////////////////////////////////////////////
-  //// Registration of views
-
-  /**
-   * Adds an object to be notified when the available download data changes.
-   * The specified object is initialized with the currently available downloads.
-   *
-   * @param aView
-   *        DownloadsView object to be added.  This reference must be passed to
-   *        removeView before termination.
-   */
-  addView(aView) {
-    this._views.push(aView);
-    this._updateView(aView);
-  },
-
-  /**
-   * Removes an object previously added using addView.
-   *
-   * @param aView
-   *        DownloadsView object to be removed.
-   */
-  removeView(aView) {
-    let index = this._views.indexOf(aView);
-    if (index != -1) {
-      this._views.splice(index, 1);
-    }
-  },
-
-  /**
-   * Ensures that the currently loaded data is added to the specified view.
-   *
-   * @param aView
-   *        DownloadsView object to be initialized.
-   */
-  _updateView(aView) {
-    // Indicate to the view that a batch loading operation is in progress.
-    aView.onDataLoadStarting();
-
-    // Sort backwards by start time, ensuring that the most recent
-    // downloads are added first regardless of their state.
-    let downloadsArray = [...this.downloads];
-    downloadsArray.sort((a, b) => b.startTime - a.startTime);
-    downloadsArray.forEach(download => aView.onDownloadAdded(download, false));
-
-    // Notify the view that all data is available.
-    aView.onDataLoadCompleted();
-  },
-
-  //////////////////////////////////////////////////////////////////////////////
-  //// Notifications sent to the most recent browser window only
-
-  /**
-   * Set to true after the first download causes the downloads panel to be
-   * displayed.
-   */
-  get panelHasShownBefore() {
-    try {
-      return Services.prefs.getBoolPref("browser.download.panel.shown");
-    } catch (ex) { }
-    return false;
-  },
-
-  set panelHasShownBefore(aValue) {
-    Services.prefs.setBoolPref("browser.download.panel.shown", aValue);
-    return aValue;
-  },
-
-  /**
-   * Displays a new or finished download notification in the most recent browser
-   * window, if one is currently available with the required privacy type.
-   *
-   * @param aType
-   *        Set to "start" for new downloads, "finish" for completed downloads.
-   */
-  _notifyDownloadEvent(aType) {
-    DownloadsCommon.log("Attempting to notify that a new download has started or finished.");
-
-    // Show the panel in the most recent browser window, if present.
-    let browserWin = RecentWindow.getMostRecentBrowserWindow({ private: this._isPrivate });
-    if (!browserWin) {
-      return;
-    }
-
-    if (this.panelHasShownBefore) {
-      // For new downloads after the first one, don't show the panel
-      // automatically, but provide a visible notification in the topmost
-      // browser window, if the status indicator is already visible.
-      DownloadsCommon.log("Showing new download notification.");
-      browserWin.DownloadsIndicatorView.showEventNotification(aType);
-      return;
-    }
-    this.panelHasShownBefore = true;
-    browserWin.DownloadsPanel.showPanel();
-  }
-};
-
-XPCOMUtils.defineLazyGetter(this, "PrivateDownloadsData", function() {
-  return new DownloadsDataCtor(true);
-});
-
-XPCOMUtils.defineLazyGetter(this, "DownloadsData", function() {
-  return new DownloadsDataCtor(false);
-});
-
-////////////////////////////////////////////////////////////////////////////////
-//// DownloadsViewPrototype
-
-/**
- * A prototype for an object that registers itself with DownloadsData as soon
- * as a view is registered with it.
- */
-const DownloadsViewPrototype = {
-  //////////////////////////////////////////////////////////////////////////////
-  //// Registration of views
-
-  /**
-   * Array of view objects that should be notified when the available status
-   * data changes.
-   *
-   * SUBCLASSES MUST OVERRIDE THIS PROPERTY.
-   */
-  _views: null,
-
-  /**
-   * Determines whether this view object is over the private or non-private
-   * downloads.
-   *
-   * SUBCLASSES MUST OVERRIDE THIS PROPERTY.
-   */
-  _isPrivate: false,
-
-  /**
-   * Adds an object to be notified when the available status data changes.
-   * The specified object is initialized with the currently available status.
-   *
-   * @param aView
-   *        View object to be added.  This reference must be
-   *        passed to removeView before termination.
-   */
-  addView(aView) {
-    // Start receiving events when the first of our views is registered.
-    if (this._views.length == 0) {
-      if (this._isPrivate) {
-        PrivateDownloadsData.addView(this);
-      } else {
-        DownloadsData.addView(this);
-      }
-    }
-
-    this._views.push(aView);
-    this.refreshView(aView);
-  },
-
-  /**
-   * Updates the properties of an object previously added using addView.
-   *
-   * @param aView
-   *        View object to be updated.
-   */
-  refreshView(aView) {
-    // Update immediately even if we are still loading data asynchronously.
-    // Subclasses must provide these two functions!
-    this._refreshProperties();
-    this._updateView(aView);
-  },
-
-  /**
-   * Removes an object previously added using addView.
-   *
-   * @param aView
-   *        View object to be removed.
-   */
-  removeView(aView) {
-    let index = this._views.indexOf(aView);
-    if (index != -1) {
-      this._views.splice(index, 1);
-    }
-
-    // Stop receiving events when the last of our views is unregistered.
-    if (this._views.length == 0) {
-      if (this._isPrivate) {
-        PrivateDownloadsData.removeView(this);
-      } else {
-        DownloadsData.removeView(this);
-      }
-    }
-  },
-
-  //////////////////////////////////////////////////////////////////////////////
-  //// Callback functions from DownloadsData
-
-  /**
-   * Indicates whether we are still loading downloads data asynchronously.
-   */
-  _loading: false,
-
-  /**
-   * Called before multiple downloads are about to be loaded.
-   */
-  onDataLoadStarting() {
-    this._loading = true;
-  },
-
-  /**
-   * Called after data loading finished.
-   */
-  onDataLoadCompleted() {
-    this._loading = false;
-  },
-
-  /**
-   * Called when a new download data item is available, either during the
-   * asynchronous data load or when a new download is started.
-   *
-   * @param download
-   *        Download object that was just added.
-   * @param newest
-   *        When true, indicates that this item is the most recent and should be
-   *        added in the topmost position.  This happens when a new download is
-   *        started.  When false, indicates that the item is the least recent
-   *        with regard to the items that have been already added. The latter
-   *        generally happens during the asynchronous data load.
-   *
-   * @note Subclasses should override this.
-   */
-  onDownloadAdded(download, newest) {
-    throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
-  },
-
-  /**
-   * Called when the overall state of a Download has changed. In particular,
-   * this is called only once when the download succeeds or is blocked
-   * permanently, and is never called if only the current progress changed.
-   *
-   * The onDownloadChanged notification will always be sent afterwards.
-   *
-   * @note Subclasses should override this.
-   */
-  onDownloadStateChanged(download) {
-    throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
-  },
-
-  /**
-   * Called every time any state property of a Download may have changed,
-   * including progress properties.
-   *
-   * Note that progress notification changes are throttled at the Downloads.jsm
-   * API level, and there is no throttling mechanism in the front-end.
-   *
-   * @note Subclasses should override this.
-   */
-  onDownloadChanged(download) {
-    throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
-  },
-
-  /**
-   * Called when a data item is removed, ensures that the widget associated with
-   * the view item is removed from the user interface.
-   *
-   * @param download
-   *        Download object that is being removed.
-   *
-   * @note Subclasses should override this.
-   */
-  onDownloadRemoved(download) {
-    throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
-  },
-
-  /**
-   * Private function used to refresh the internal properties being sent to
-   * each registered view.
-   *
-   * @note Subclasses should override this.
-   */
-  _refreshProperties() {
-    throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
-  },
-
-  /**
-   * Private function used to refresh an individual view.
-   *
-   * @note Subclasses should override this.
-   */
-  _updateView() {
-    throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
-  },
-};
-
-////////////////////////////////////////////////////////////////////////////////
-//// DownloadsIndicatorData
-
-/**
- * This object registers itself with DownloadsData as a view, and transforms the
- * notifications it receives into overall status data, that is then broadcast to
- * the registered download status indicators.
- *
- * Note that using this object does not automatically start the Download Manager
- * service.  Consumers will see an empty list of downloads until the service is
- * actually started.  This is useful to display a neutral progress indicator in
- * the main browser window until the autostart timeout elapses.
- */
-function DownloadsIndicatorDataCtor(aPrivate) {
-  this._isPrivate = aPrivate;
-  this._views = [];
-}
-DownloadsIndicatorDataCtor.prototype = {
-  __proto__: DownloadsViewPrototype,
-
-  /**
-   * Removes an object previously added using addView.
-   *
-   * @param aView
-   *        DownloadsIndicatorView object to be removed.
-   */
-  removeView(aView) {
-    DownloadsViewPrototype.removeView.call(this, aView);
-
-    if (this._views.length == 0) {
-      this._itemCount = 0;
-    }
-  },
-
-  //////////////////////////////////////////////////////////////////////////////
-  //// Callback functions from DownloadsData
-
-  onDataLoadCompleted() {
-    DownloadsViewPrototype.onDataLoadCompleted.call(this);
-    this._updateViews();
-  },
-
-  onDownloadAdded(download, newest) {
-    this._itemCount++;
-    this._updateViews();
-  },
-
-  onDownloadStateChanged(download) {
-    if (!download.succeeded && download.error && download.error.reputationCheckVerdict) {
-      switch (download.error.reputationCheckVerdict) {
-        case Downloads.Error.BLOCK_VERDICT_UNCOMMON: // fall-through
-        case Downloads.Error.BLOCK_VERDICT_POTENTIALLY_UNWANTED:
-          // Existing higher level attention indication trumps ATTENTION_WARNING.
-          if (this._attention != DownloadsCommon.ATTENTION_SEVERE) {
-            this.attention = DownloadsCommon.ATTENTION_WARNING;
-          }
-          break;
-        case Downloads.Error.BLOCK_VERDICT_MALWARE:
-          this.attention = DownloadsCommon.ATTENTION_SEVERE;
-          break;
-        default:
-          this.attention = DownloadsCommon.ATTENTION_SEVERE;
-          Cu.reportError("Unknown reputation verdict: " +
-                         download.error.reputationCheckVerdict);
-      }
-    } else if (download.succeeded) {
-      // Existing higher level attention indication trumps ATTENTION_SUCCESS.
-      if (this._attention != DownloadsCommon.ATTENTION_SEVERE &&
-          this._attention != DownloadsCommon.ATTENTION_WARNING) {
-        this.attention = DownloadsCommon.ATTENTION_SUCCESS;
-      }
-    } else if (download.error) {
-      // Existing higher level attention indication trumps ATTENTION_WARNING.
-      if (this._attention != DownloadsCommon.ATTENTION_SEVERE) {
-        this.attention = DownloadsCommon.ATTENTION_WARNING;
-      }
-    }
-
-    // Since the state of a download changed, reset the estimated time left.
-    this._lastRawTimeLeft = -1;
-    this._lastTimeLeft = -1;
-  },
-
-  onDownloadChanged(download) {
-    this._updateViews();
-  },
-
-  onDownloadRemoved(download) {
-    this._itemCount--;
-    this._updateViews();
-  },
-
-  //////////////////////////////////////////////////////////////////////////////
-  //// Propagation of properties to our views
-
-  // The following properties are updated by _refreshProperties and are then
-  // propagated to the views.  See _refreshProperties for details.
-  _hasDownloads: false,
-  _counter: "",
-  _percentComplete: -1,
-  _paused: false,
-
-  /**
-   * Indicates whether the download indicators should be highlighted.
-   */
-  set attention(aValue) {
-    this._attention = aValue;
-    this._updateViews();
-    return aValue;
-  },
-  _attention: DownloadsCommon.ATTENTION_NONE,
-
-  /**
-   * Indicates whether the user is interacting with downloads, thus the
-   * attention indication should not be shown even if requested.
-   */
-  set attentionSuppressed(aValue) {
-    this._attentionSuppressed = aValue;
-    this._attention = DownloadsCommon.ATTENTION_NONE;
-    this._updateViews();
-    return aValue;
-  },
-  _attentionSuppressed: false,
-
-  /**
-   * Computes aggregate values and propagates the changes to our views.
-   */
-  _updateViews() {
-    // Do not update the status indicators during batch loads of download items.
-    if (this._loading) {
-      return;
-    }
-
-    this._refreshProperties();
-    this._views.forEach(this._updateView, this);
-  },
-
-  /**
-   * Updates the specified view with the current aggregate values.
-   *
-   * @param aView
-   *        DownloadsIndicatorView object to be updated.
-   */
-  _updateView(aView) {
-    aView.hasDownloads = this._hasDownloads;
-    aView.counter = this._counter;
-    aView.percentComplete = this._percentComplete;
-    aView.paused = this._paused;
-    aView.attention = this._attentionSuppressed ? DownloadsCommon.ATTENTION_NONE
-                                                : this._attention;
-  },
-
-  //////////////////////////////////////////////////////////////////////////////
-  //// Property updating based on current download status
-
-  /**
-   * Number of download items that are available to be displayed.
-   */
-  _itemCount: 0,
-
-  /**
-   * Floating point value indicating the last number of seconds estimated until
-   * the longest download will finish.  We need to store this value so that we
-   * don't continuously apply smoothing if the actual download state has not
-   * changed.  This is set to -1 if the previous value is unknown.
-   */
-  _lastRawTimeLeft: -1,
-
-  /**
-   * Last number of seconds estimated until all in-progress downloads with a
-   * known size and speed will finish.  This value is stored to allow smoothing
-   * in case of small variations.  This is set to -1 if the previous value is
-   * unknown.
-   */
-  _lastTimeLeft: -1,
-
-  /**
-   * A generator function for the Download objects this summary is currently
-   * interested in. This generator is passed off to summarizeDownloads in order
-   * to generate statistics about the downloads we care about - in this case,
-   * it's all active downloads.
-   */
-  * _activeDownloads() {
-    let downloads = this._isPrivate ? PrivateDownloadsData.downloads
-                                    : DownloadsData.downloads;
-    for (let download of downloads) {
-      if (!download.stopped || (download.canceled && download.hasPartialData)) {
-        yield download;
-      }
-    }
-  },
-
-  /**
-   * Computes aggregate values based on the current state of downloads.
-   */
-  _refreshProperties() {
-    let summary =
-      DownloadsCommon.summarizeDownloads(this._activeDownloads());
-
-    // Determine if the indicator should be shown or get attention.
-    this._hasDownloads = (this._itemCount > 0);
-
-    // If all downloads are paused, show the progress indicator as paused.
-    this._paused = summary.numActive > 0 &&
-                   summary.numActive == summary.numPaused;
-
-    this._percentComplete = summary.percentComplete;
-
-    // Display the estimated time left, if present.
-    if (summary.rawTimeLeft == -1) {
-      // There are no downloads with a known time left.
-      this._lastRawTimeLeft = -1;
-      this._lastTimeLeft = -1;
-      this._counter = "";
-    } else {
-      // Compute the new time left only if state actually changed.
-      if (this._lastRawTimeLeft != summary.rawTimeLeft) {
-        this._lastRawTimeLeft = summary.rawTimeLeft;
-        this._lastTimeLeft = DownloadsCommon.smoothSeconds(summary.rawTimeLeft,
-                                                           this._lastTimeLeft);
-      }
-      this._counter = DownloadsCommon.formatTimeLeft(this._lastTimeLeft);
-    }
-  }
-};
-
-XPCOMUtils.defineLazyGetter(this, "PrivateDownloadsIndicatorData", function() {
-  return new DownloadsIndicatorDataCtor(true);
-});
-
-XPCOMUtils.defineLazyGetter(this, "DownloadsIndicatorData", function() {
-  return new DownloadsIndicatorDataCtor(false);
-});
-
-////////////////////////////////////////////////////////////////////////////////
-//// DownloadsSummaryData
-
-/**
- * DownloadsSummaryData is a view for DownloadsData that produces a summary
- * of all downloads after a certain exclusion point aNumToExclude. For example,
- * if there were 5 downloads in progress, and a DownloadsSummaryData was
- * constructed with aNumToExclude equal to 3, then that DownloadsSummaryData
- * would produce a summary of the last 2 downloads.
- *
- * @param aIsPrivate
- *        True if the browser window which owns the download button is a private
- *        window.
- * @param aNumToExclude
- *        The number of items to exclude from the summary, starting from the
- *        top of the list.
- */
-function DownloadsSummaryData(aIsPrivate, aNumToExclude) {
-  this._numToExclude = aNumToExclude;
-  // Since we can have multiple instances of DownloadsSummaryData, we
-  // override these values from the prototype so that each instance can be
-  // completely separated from one another.
-  this._loading = false;
-
-  this._downloads = [];
-
-  // Floating point value indicating the last number of seconds estimated until
-  // the longest download will finish.  We need to store this value so that we
-  // don't continuously apply smoothing if the actual download state has not
-  // changed.  This is set to -1 if the previous value is unknown.
-  this._lastRawTimeLeft = -1;
-
-  // Last number of seconds estimated until all in-progress downloads with a
-  // known size and speed will finish.  This value is stored to allow smoothing
-  // in case of small variations.  This is set to -1 if the previous value is
-  // unknown.
-  this._lastTimeLeft = -1;
-
-  // The following properties are updated by _refreshProperties and are then
-  // propagated to the views.
-  this._showingProgress = false;
-  this._details = "";
-  this._description = "";
-  this._numActive = 0;
-  this._percentComplete = -1;
-
-  this._isPrivate = aIsPrivate;
-  this._views = [];
-}
-
-DownloadsSummaryData.prototype = {
-  __proto__: DownloadsViewPrototype,
-
-  /**
-   * Removes an object previously added using addView.
-   *
-   * @param aView
-   *        DownloadsSummary view to be removed.
-   */
-  removeView(aView) {
-    DownloadsViewPrototype.removeView.call(this, aView);
-
-    if (this._views.length == 0) {
-      // Clear out our collection of Download objects. If we ever have
-      // another view registered with us, this will get re-populated.
-      this._downloads = [];
-    }
-  },
-
-  //////////////////////////////////////////////////////////////////////////////
-  //// Callback functions from DownloadsData - see the documentation in
-  //// DownloadsViewPrototype for more information on what these functions
-  //// are used for.
-
-  onDataLoadCompleted() {
-    DownloadsViewPrototype.onDataLoadCompleted.call(this);
-    this._updateViews();
-  },
-
-  onDownloadAdded(download, newest) {
-    if (newest) {
-      this._downloads.unshift(download);
-    } else {
-      this._downloads.push(download);
-    }
-
-    this._updateViews();
-  },
-
-  onDownloadStateChanged() {
-    // Since the state of a download changed, reset the estimated time left.
-    this._lastRawTimeLeft = -1;
-    this._lastTimeLeft = -1;
-  },
-
-  onDownloadChanged() {
-    this._updateViews();
-  },
-
-  onDownloadRemoved(download) {
-    let itemIndex = this._downloads.indexOf(download);
-    this._downloads.splice(itemIndex, 1);
-    this._updateViews();
-  },
-
-  //////////////////////////////////////////////////////////////////////////////
-  //// Propagation of properties to our views
-
-  /**
-   * Computes aggregate values and propagates the changes to our views.
-   */
-  _updateViews() {
-    // Do not update the status indicators during batch loads of download items.
-    if (this._loading) {
-      return;
-    }
-
-    this._refreshProperties();
-    this._views.forEach(this._updateView, this);
-  },
-
-  /**
-   * Updates the specified view with the current aggregate values.
-   *
-   * @param aView
-   *        DownloadsIndicatorView object to be updated.
-   */
-  _updateView(aView) {
-    aView.showingProgress = this._showingProgress;
-    aView.percentComplete = this._percentComplete;
-    aView.description = this._description;
-    aView.details = this._details;
-  },
-
-  //////////////////////////////////////////////////////////////////////////////
-  //// Property updating based on current download status
-
-  /**
-   * A generator function for the Download objects this summary is currently
-   * interested in. This generator is passed off to summarizeDownloads in order
-   * to generate statistics about the downloads we care about - in this case,
-   * it's the downloads in this._downloads after the first few to exclude,
-   * which was set when constructing this DownloadsSummaryData instance.
-   */
-  * _downloadsForSummary() {
-    if (this._downloads.length > 0) {
-      for (let i = this._numToExclude; i < this._downloads.length; ++i) {
-        yield this._downloads[i];
-      }
-    }
-  },
-
-  /**
-   * Computes aggregate values based on the current state of downloads.
-   */
-  _refreshProperties() {
-    // Pre-load summary with default values.
-    let summary =
-      DownloadsCommon.summarizeDownloads(this._downloadsForSummary());
-
-    this._description = DownloadsCommon.strings
-                                       .otherDownloads3(summary.numDownloading);
-    this._percentComplete = summary.percentComplete;
-
-    // Only show the downloading items.
-    this._showingProgress = summary.numDownloading > 0;
-
-    // Display the estimated time left, if present.
-    if (summary.rawTimeLeft == -1) {
-      // There are no downloads with a known time left.
-      this._lastRawTimeLeft = -1;
-      this._lastTimeLeft = -1;
-      this._details = "";
-    } else {
-      // Compute the new time left only if state actually changed.
-      if (this._lastRawTimeLeft != summary.rawTimeLeft) {
-        this._lastRawTimeLeft = summary.rawTimeLeft;
-        this._lastTimeLeft = DownloadsCommon.smoothSeconds(summary.rawTimeLeft,
-                                                           this._lastTimeLeft);
-      }
-      [this._details] = DownloadUtils.getDownloadStatusNoRate(
-        summary.totalTransferred, summary.totalSize, summary.slowestSpeed,
-        this._lastTimeLeft);
-    }
-  },
-}