Remove the WebExtension Add-on Manager from our tree.

Tag #936

1 files changed, 0 insertions, 909 deletions

diff --git a/toolkit/mozapps/webextensions/LightweightThemeManager.jsm b/toolkit/mozapps/webextensions/LightweightThemeManager.jsm
deleted file mode 100644
index 5dd41831d..000000000
--- a/toolkit/mozapps/webextensions/LightweightThemeManager.jsm
+++ /dev/null
@@ -1,909 +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";
-
-this.EXPORTED_SYMBOLS = ["LightweightThemeManager"];
-
-const Cc = Components.classes;
-const Ci = Components.interfaces;
-
-Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
-Components.utils.import("resource://gre/modules/AddonManager.jsm");
-/* globals AddonManagerPrivate*/
-Components.utils.import("resource://gre/modules/Services.jsm");
-
-const ID_SUFFIX              = "@personas.mozilla.org";
-const PREF_LWTHEME_TO_SELECT = "extensions.lwThemeToSelect";
-const PREF_GENERAL_SKINS_SELECTEDSKIN = "general.skins.selectedSkin";
-const PREF_EM_DSS_ENABLED    = "extensions.dss.enabled";
-const ADDON_TYPE             = "theme";
-
-const URI_EXTENSION_STRINGS  = "chrome://mozapps/locale/extensions/extensions.properties";
-
-const STRING_TYPE_NAME       = "type.%ID%.name";
-
-const DEFAULT_MAX_USED_THEMES_COUNT = 30;
-
-const MAX_PREVIEW_SECONDS = 30;
-
-const MANDATORY = ["id", "name", "headerURL"];
-const OPTIONAL = ["footerURL", "textcolor", "accentcolor", "iconURL",
-                  "previewURL", "author", "description", "homepageURL",
-                  "updateURL", "version"];
-
-const PERSIST_ENABLED = true;
-const PERSIST_BYPASS_CACHE = false;
-const PERSIST_FILES = {
-  headerURL: "lightweighttheme-header",
-  footerURL: "lightweighttheme-footer"
-};
-
-XPCOMUtils.defineLazyModuleGetter(this, "LightweightThemeImageOptimizer",
-  "resource://gre/modules/addons/LightweightThemeImageOptimizer.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "ServiceRequest",
-  "resource://gre/modules/ServiceRequest.jsm");
-
-
-XPCOMUtils.defineLazyGetter(this, "_prefs", () => {
-  return Services.prefs.getBranch("lightweightThemes.");
-});
-
-Object.defineProperty(this, "_maxUsedThemes", {
-  get: function() {
-    delete this._maxUsedThemes;
-    try {
-      this._maxUsedThemes = _prefs.getIntPref("maxUsedThemes");
-    }
-    catch (e) {
-      this._maxUsedThemes = DEFAULT_MAX_USED_THEMES_COUNT;
-    }
-    return this._maxUsedThemes;
-  },
-
-  set: function(val) {
-    delete this._maxUsedThemes;
-    return this._maxUsedThemes = val;
-  },
-  configurable: true,
-});
-
-// Holds the ID of the theme being enabled or disabled while sending out the
-// events so cached AddonWrapper instances can return correct values for
-// permissions and pendingOperations
-var _themeIDBeingEnabled = null;
-var _themeIDBeingDisabled = null;
-
-// Convert from the old storage format (in which the order of usedThemes
-// was combined with isThemeSelected to determine which theme was selected)
-// to the new one (where a selectedThemeID determines which theme is selected).
-(function() {
-  let wasThemeSelected = false;
-  try {
-    wasThemeSelected = _prefs.getBoolPref("isThemeSelected");
-  } catch (e) { }
-
-  if (wasThemeSelected) {
-    _prefs.clearUserPref("isThemeSelected");
-    let themes = [];
-    try {
-      themes = JSON.parse(_prefs.getComplexValue("usedThemes",
-                                                 Ci.nsISupportsString).data);
-    } catch (e) { }
-
-    if (Array.isArray(themes) && themes[0]) {
-      _prefs.setCharPref("selectedThemeID", themes[0].id);
-    }
-  }
-})();
-
-this.LightweightThemeManager = {
-  get name() {
-    return "LightweightThemeManager";
-  },
-
-  // Themes that can be added for an application.  They can't be removed, and
-  // will always show up at the top of the list.
-  _builtInThemes: new Map(),
-
-  get usedThemes () {
-    let themes = [];
-    try {
-      themes = JSON.parse(_prefs.getComplexValue("usedThemes",
-                                                 Ci.nsISupportsString).data);
-    } catch (e) { }
-
-    themes.push(...this._builtInThemes.values());
-    return themes;
-  },
-
-  get currentTheme () {
-    let selectedThemeID = null;
-    try {
-      selectedThemeID = _prefs.getCharPref("selectedThemeID");
-    } catch (e) {}
-
-    let data = null;
-    if (selectedThemeID) {
-      data = this.getUsedTheme(selectedThemeID);
-    }
-    return data;
-  },
-
-  get currentThemeForDisplay () {
-    var data = this.currentTheme;
-
-    if (data && PERSIST_ENABLED) {
-      for (let key in PERSIST_FILES) {
-        try {
-          if (data[key] && _prefs.getBoolPref("persisted." + key))
-            data[key] = _getLocalImageURI(PERSIST_FILES[key]).spec
-                        + "?" + data.id + ";" + _version(data);
-        } catch (e) {}
-      }
-    }
-
-    return data;
-  },
-
-  set currentTheme (aData) {
-    return _setCurrentTheme(aData, false);
-  },
-
-  setLocalTheme: function(aData) {
-    _setCurrentTheme(aData, true);
-  },
-
-  getUsedTheme: function(aId) {
-    var usedThemes = this.usedThemes;
-    for (let usedTheme of usedThemes) {
-      if (usedTheme.id == aId)
-        return usedTheme;
-    }
-    return null;
-  },
-
-  forgetUsedTheme: function(aId) {
-    let theme = this.getUsedTheme(aId);
-    if (!theme || LightweightThemeManager._builtInThemes.has(theme.id))
-      return;
-
-    let wrapper = new AddonWrapper(theme);
-    AddonManagerPrivate.callAddonListeners("onUninstalling", wrapper, false);
-
-    var currentTheme = this.currentTheme;
-    if (currentTheme && currentTheme.id == aId) {
-      this.themeChanged(null);
-      AddonManagerPrivate.notifyAddonChanged(null, ADDON_TYPE, false);
-    }
-
-    _updateUsedThemes(_usedThemesExceptId(aId));
-    AddonManagerPrivate.callAddonListeners("onUninstalled", wrapper);
-  },
-
-  addBuiltInTheme: function(theme) {
-    if (!theme || !theme.id || this.usedThemes.some(t => t.id == theme.id)) {
-      throw new Error("Trying to add invalid builtIn theme");
-    }
-
-    this._builtInThemes.set(theme.id, theme);
-
-    if (_prefs.getCharPref("selectedThemeID") == theme.id) {
-      this.currentTheme = theme;
-    }
-  },
-
-  forgetBuiltInTheme: function(id) {
-    if (!this._builtInThemes.has(id)) {
-      let currentTheme = this.currentTheme;
-      if (currentTheme && currentTheme.id == id) {
-        this.currentTheme = null;
-      }
-    }
-    return this._builtInThemes.delete(id);
-  },
-
-  clearBuiltInThemes: function() {
-    for (let id of this._builtInThemes.keys()) {
-      this.forgetBuiltInTheme(id);
-    }
-  },
-
-  previewTheme: function(aData) {
-    let cancel = Cc["@mozilla.org/supports-PRBool;1"].createInstance(Ci.nsISupportsPRBool);
-    cancel.data = false;
-    Services.obs.notifyObservers(cancel, "lightweight-theme-preview-requested",
-                                 JSON.stringify(aData));
-    if (cancel.data)
-      return;
-
-    if (_previewTimer)
-      _previewTimer.cancel();
-    else
-      _previewTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
-    _previewTimer.initWithCallback(_previewTimerCallback,
-                                   MAX_PREVIEW_SECONDS * 1000,
-                                   _previewTimer.TYPE_ONE_SHOT);
-
-    _notifyWindows(aData);
-  },
-
-  resetPreview: function() {
-    if (_previewTimer) {
-      _previewTimer.cancel();
-      _previewTimer = null;
-      _notifyWindows(this.currentThemeForDisplay);
-    }
-  },
-
-  parseTheme: function(aString, aBaseURI) {
-    try {
-      return _sanitizeTheme(JSON.parse(aString), aBaseURI, false);
-    } catch (e) {
-      return null;
-    }
-  },
-
-  updateCurrentTheme: function() {
-    try {
-      if (!_prefs.getBoolPref("update.enabled"))
-        return;
-    } catch (e) {
-      return;
-    }
-
-    var theme = this.currentTheme;
-    if (!theme || !theme.updateURL)
-      return;
-
-    var req = new ServiceRequest();
-
-    req.mozBackgroundRequest = true;
-    req.overrideMimeType("text/plain");
-    req.open("GET", theme.updateURL, true);
-    // Prevent the request from reading from the cache.
-    req.channel.loadFlags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
-    // Prevent the request from writing to the cache.
-    req.channel.loadFlags |= Ci.nsIRequest.INHIBIT_CACHING;
-
-    req.addEventListener("load", () => {
-      if (req.status != 200)
-        return;
-
-      let newData = this.parseTheme(req.responseText, theme.updateURL);
-      if (!newData ||
-          newData.id != theme.id ||
-          _version(newData) == _version(theme))
-        return;
-
-      var currentTheme = this.currentTheme;
-      if (currentTheme && currentTheme.id == theme.id)
-        this.currentTheme = newData;
-    }, false);
-
-    req.send(null);
-  },
-
-  /**
-   * Switches to a new lightweight theme.
-   *
-   * @param  aData
-   *         The lightweight theme to switch to
-   */
-  themeChanged: function(aData) {
-    if (_previewTimer) {
-      _previewTimer.cancel();
-      _previewTimer = null;
-    }
-
-    if (aData) {
-      let usedThemes = _usedThemesExceptId(aData.id);
-      usedThemes.unshift(aData);
-      _updateUsedThemes(usedThemes);
-      if (PERSIST_ENABLED) {
-        LightweightThemeImageOptimizer.purge();
-        _persistImages(aData, function() {
-          _notifyWindows(this.currentThemeForDisplay);
-        }.bind(this));
-      }
-    }
-
-    if (aData)
-      _prefs.setCharPref("selectedThemeID", aData.id);
-    else
-      _prefs.setCharPref("selectedThemeID", "");
-
-    _notifyWindows(aData);
-    Services.obs.notifyObservers(null, "lightweight-theme-changed", null);
-  },
-
-  /**
-   * Starts the Addons provider and enables the new lightweight theme if
-   * necessary.
-   */
-  startup: function() {
-    if (Services.prefs.prefHasUserValue(PREF_LWTHEME_TO_SELECT)) {
-      let id = Services.prefs.getCharPref(PREF_LWTHEME_TO_SELECT);
-      if (id)
-        this.themeChanged(this.getUsedTheme(id));
-      else
-        this.themeChanged(null);
-      Services.prefs.clearUserPref(PREF_LWTHEME_TO_SELECT);
-    }
-
-    _prefs.addObserver("", _prefObserver, false);
-  },
-
-  /**
-   * Shuts down the provider.
-   */
-  shutdown: function() {
-    _prefs.removeObserver("", _prefObserver);
-  },
-
-  /**
-   * Called when a new add-on has been enabled when only one add-on of that type
-   * can be enabled.
-   *
-   * @param  aId
-   *         The ID of the newly enabled add-on
-   * @param  aType
-   *         The type of the newly enabled add-on
-   * @param  aPendingRestart
-   *         true if the newly enabled add-on will only become enabled after a
-   *         restart
-   */
-  addonChanged: function(aId, aType, aPendingRestart) {
-    if (aType != ADDON_TYPE)
-      return;
-
-    let id = _getInternalID(aId);
-    let current = this.currentTheme;
-
-    try {
-      let next = Services.prefs.getCharPref(PREF_LWTHEME_TO_SELECT);
-      if (id == next && aPendingRestart)
-        return;
-
-      Services.prefs.clearUserPref(PREF_LWTHEME_TO_SELECT);
-      if (next) {
-        AddonManagerPrivate.callAddonListeners("onOperationCancelled",
-                                               new AddonWrapper(this.getUsedTheme(next)));
-      }
-      else if (id == current.id) {
-        AddonManagerPrivate.callAddonListeners("onOperationCancelled",
-                                               new AddonWrapper(current));
-        return;
-      }
-    }
-    catch (e) {
-    }
-
-    if (current) {
-      if (current.id == id)
-        return;
-      _themeIDBeingDisabled = current.id;
-      let wrapper = new AddonWrapper(current);
-      if (aPendingRestart) {
-        Services.prefs.setCharPref(PREF_LWTHEME_TO_SELECT, "");
-        AddonManagerPrivate.callAddonListeners("onDisabling", wrapper, true);
-      }
-      else {
-        AddonManagerPrivate.callAddonListeners("onDisabling", wrapper, false);
-        this.themeChanged(null);
-        AddonManagerPrivate.callAddonListeners("onDisabled", wrapper);
-      }
-      _themeIDBeingDisabled = null;
-    }
-
-    if (id) {
-      let theme = this.getUsedTheme(id);
-      _themeIDBeingEnabled = id;
-      let wrapper = new AddonWrapper(theme);
-      if (aPendingRestart) {
-        AddonManagerPrivate.callAddonListeners("onEnabling", wrapper, true);
-        Services.prefs.setCharPref(PREF_LWTHEME_TO_SELECT, id);
-
-        // Flush the preferences to disk so they survive any crash
-        Services.prefs.savePrefFile(null);
-      }
-      else {
-        AddonManagerPrivate.callAddonListeners("onEnabling", wrapper, false);
-        this.themeChanged(theme);
-        AddonManagerPrivate.callAddonListeners("onEnabled", wrapper);
-      }
-      _themeIDBeingEnabled = null;
-    }
-  },
-
-  /**
-   * Called to get an Addon with a particular ID.
-   *
-   * @param  aId
-   *         The ID of the add-on to retrieve
-   * @param  aCallback
-   *         A callback to pass the Addon to
-   */
-  getAddonByID: function(aId, aCallback) {
-    let id = _getInternalID(aId);
-    if (!id) {
-      aCallback(null);
-      return;
-     }
-
-    let theme = this.getUsedTheme(id);
-    if (!theme) {
-      aCallback(null);
-      return;
-    }
-
-    aCallback(new AddonWrapper(theme));
-  },
-
-  /**
-   * Called to get Addons of a particular type.
-   *
-   * @param  aTypes
-   *         An array of types to fetch. Can be null to get all types.
-   * @param  aCallback
-   *         A callback to pass an array of Addons to
-   */
-  getAddonsByTypes: function(aTypes, aCallback) {
-    if (aTypes && aTypes.indexOf(ADDON_TYPE) == -1) {
-      aCallback([]);
-      return;
-    }
-
-    aCallback(this.usedThemes.map(a => new AddonWrapper(a)));
-  },
-};
-
-const wrapperMap = new WeakMap();
-let themeFor = wrapper => wrapperMap.get(wrapper);
-
-/**
- * The AddonWrapper wraps lightweight theme to provide the data visible to
- * consumers of the AddonManager API.
- */
-function AddonWrapper(aTheme) {
-  wrapperMap.set(this, aTheme);
-}
-
-AddonWrapper.prototype = {
-  get id() {
-    return themeFor(this).id + ID_SUFFIX;
-  },
-
-  get type() {
-    return ADDON_TYPE;
-  },
-
-  get isActive() {
-    let current = LightweightThemeManager.currentTheme;
-    if (current)
-      return themeFor(this).id == current.id;
-    return false;
-  },
-
-  get name() {
-    return themeFor(this).name;
-  },
-
-  get version() {
-    let theme = themeFor(this);
-    return "version" in theme ? theme.version : "";
-  },
-
-  get creator() {
-    let theme = themeFor(this);
-    return "author" in theme ? new AddonManagerPrivate.AddonAuthor(theme.author) : null;
-  },
-
-  get screenshots() {
-    let url = themeFor(this).previewURL;
-    return [new AddonManagerPrivate.AddonScreenshot(url)];
-  },
-
-  get pendingOperations() {
-    let pending = AddonManager.PENDING_NONE;
-    if (this.isActive == this.userDisabled)
-      pending |= this.isActive ? AddonManager.PENDING_DISABLE : AddonManager.PENDING_ENABLE;
-    return pending;
-  },
-
-  get operationsRequiringRestart() {
-    // If a non-default theme is in use then a restart will be required to
-    // enable lightweight themes unless dynamic theme switching is enabled
-    if (Services.prefs.prefHasUserValue(PREF_GENERAL_SKINS_SELECTEDSKIN)) {
-      try {
-        if (Services.prefs.getBoolPref(PREF_EM_DSS_ENABLED))
-          return AddonManager.OP_NEEDS_RESTART_NONE;
-      }
-      catch (e) {
-      }
-      return AddonManager.OP_NEEDS_RESTART_ENABLE;
-    }
-
-    return AddonManager.OP_NEEDS_RESTART_NONE;
-  },
-
-  get size() {
-    // The size changes depending on whether the theme is in use or not, this is
-    // probably not worth exposing.
-    return null;
-  },
-
-  get permissions() {
-    let permissions = 0;
-
-    // Do not allow uninstall of builtIn themes.
-    if (!LightweightThemeManager._builtInThemes.has(themeFor(this).id))
-      permissions = AddonManager.PERM_CAN_UNINSTALL;
-    if (this.userDisabled)
-      permissions |= AddonManager.PERM_CAN_ENABLE;
-    else
-      permissions |= AddonManager.PERM_CAN_DISABLE;
-    return permissions;
-  },
-
-  get userDisabled() {
-    let id = themeFor(this).id;
-    if (_themeIDBeingEnabled == id)
-      return false;
-    if (_themeIDBeingDisabled == id)
-      return true;
-
-    try {
-      let toSelect = Services.prefs.getCharPref(PREF_LWTHEME_TO_SELECT);
-      return id != toSelect;
-    }
-    catch (e) {
-      let current = LightweightThemeManager.currentTheme;
-      return !current || current.id != id;
-    }
-  },
-
-  set userDisabled(val) {
-    if (val == this.userDisabled)
-      return val;
-
-    if (val)
-      LightweightThemeManager.currentTheme = null;
-    else
-      LightweightThemeManager.currentTheme = themeFor(this);
-
-    return val;
-  },
-
-  // Lightweight themes are never disabled by the application
-  get appDisabled() {
-    return false;
-  },
-
-  // Lightweight themes are always compatible
-  get isCompatible() {
-    return true;
-  },
-
-  get isPlatformCompatible() {
-    return true;
-  },
-
-  get scope() {
-    return AddonManager.SCOPE_PROFILE;
-  },
-
-  get foreignInstall() {
-    return false;
-  },
-
-  uninstall: function() {
-    LightweightThemeManager.forgetUsedTheme(themeFor(this).id);
-  },
-
-  cancelUninstall: function() {
-    throw new Error("Theme is not marked to be uninstalled");
-  },
-
-  findUpdates: function(listener, reason, appVersion, platformVersion) {
-    AddonManagerPrivate.callNoUpdateListeners(this, listener, reason, appVersion, platformVersion);
-  },
-
-  // Lightweight themes are always compatible
-  isCompatibleWith: function(appVersion, platformVersion) {
-    return true;
-  },
-
-  // Lightweight themes are always securely updated
-  get providesUpdatesSecurely() {
-    return true;
-  },
-
-  // Lightweight themes are never blocklisted
-  get blocklistState() {
-    return Ci.nsIBlocklistService.STATE_NOT_BLOCKED;
-  }
-};
-
-["description", "homepageURL", "iconURL"].forEach(function(prop) {
-  Object.defineProperty(AddonWrapper.prototype, prop, {
-    get: function() {
-      let theme = themeFor(this);
-      return prop in theme ? theme[prop] : null;
-    },
-    enumarable: true,
-  });
-});
-
-["installDate", "updateDate"].forEach(function(prop) {
-  Object.defineProperty(AddonWrapper.prototype, prop, {
-    get: function() {
-      let theme = themeFor(this);
-      return prop in theme ? new Date(theme[prop]) : null;
-    },
-    enumarable: true,
-  });
-});
-
-/**
- * Converts the ID used by the public AddonManager API to an lightweight theme
- * ID.
- *
- * @param   id
- *          The ID to be converted
- *
- * @return  the lightweight theme ID or null if the ID was not for a lightweight
- *          theme.
- */
-function _getInternalID(id) {
-  if (!id)
-    return null;
-  let len = id.length - ID_SUFFIX.length;
-  if (len > 0 && id.substring(len) == ID_SUFFIX)
-    return id.substring(0, len);
-  return null;
-}
-
-function _setCurrentTheme(aData, aLocal) {
-  aData = _sanitizeTheme(aData, null, aLocal);
-
-  let needsRestart = (ADDON_TYPE == "theme") &&
-                     Services.prefs.prefHasUserValue(PREF_GENERAL_SKINS_SELECTEDSKIN);
-
-  let cancel = Cc["@mozilla.org/supports-PRBool;1"].createInstance(Ci.nsISupportsPRBool);
-  cancel.data = false;
-  Services.obs.notifyObservers(cancel, "lightweight-theme-change-requested",
-                               JSON.stringify(aData));
-
-  if (aData) {
-    let theme = LightweightThemeManager.getUsedTheme(aData.id);
-    let isInstall = !theme || theme.version != aData.version;
-    if (isInstall) {
-      aData.updateDate = Date.now();
-      if (theme && "installDate" in theme)
-        aData.installDate = theme.installDate;
-      else
-        aData.installDate = aData.updateDate;
-
-      var oldWrapper = theme ? new AddonWrapper(theme) : null;
-      var wrapper = new AddonWrapper(aData);
-      AddonManagerPrivate.callInstallListeners("onExternalInstall", null,
-                                               wrapper, oldWrapper, false);
-      AddonManagerPrivate.callAddonListeners("onInstalling", wrapper, false);
-    }
-
-    let current = LightweightThemeManager.currentTheme;
-    let usedThemes = _usedThemesExceptId(aData.id);
-    if (current && current.id != aData.id)
-      usedThemes.splice(1, 0, aData);
-    else
-      usedThemes.unshift(aData);
-    _updateUsedThemes(usedThemes);
-
-    if (isInstall)
-      AddonManagerPrivate.callAddonListeners("onInstalled", wrapper);
-  }
-
-  if (cancel.data)
-    return null;
-
-  AddonManagerPrivate.notifyAddonChanged(aData ? aData.id + ID_SUFFIX : null,
-                                         ADDON_TYPE, needsRestart);
-
-  return LightweightThemeManager.currentTheme;
-}
-
-function _sanitizeTheme(aData, aBaseURI, aLocal) {
-  if (!aData || typeof aData != "object")
-    return null;
-
-  var resourceProtocols = ["http", "https", "resource"];
-  if (aLocal)
-    resourceProtocols.push("file");
-  var resourceProtocolExp = new RegExp("^(" + resourceProtocols.join("|") + "):");
-
-  function sanitizeProperty(prop) {
-    if (!(prop in aData))
-      return null;
-    if (typeof aData[prop] != "string")
-      return null;
-    let val = aData[prop].trim();
-    if (!val)
-      return null;
-
-    if (!/URL$/.test(prop))
-      return val;
-
-    try {
-      val = _makeURI(val, aBaseURI ? _makeURI(aBaseURI) : null).spec;
-      if ((prop == "updateURL" ? /^https:/ : resourceProtocolExp).test(val))
-        return val;
-      return null;
-    }
-    catch (e) {
-      return null;
-    }
-  }
-
-  let result = {};
-  for (let mandatoryProperty of MANDATORY) {
-    let val = sanitizeProperty(mandatoryProperty);
-    if (!val)
-      throw Components.results.NS_ERROR_INVALID_ARG;
-    result[mandatoryProperty] = val;
-  }
-
-  for (let optionalProperty of OPTIONAL) {
-    let val = sanitizeProperty(optionalProperty);
-    if (!val)
-      continue;
-    result[optionalProperty] = val;
-  }
-
-  return result;
-}
-
-function _usedThemesExceptId(aId) {
-  return LightweightThemeManager.usedThemes.filter(function(t) {
-      return "id" in t && t.id != aId;
-    });
-}
-
-function _version(aThemeData) {
-  return aThemeData.version || "";
-}
-
-function _makeURI(aURL, aBaseURI) {
-  return Services.io.newURI(aURL, null, aBaseURI);
-}
-
-function _updateUsedThemes(aList) {
-  // Remove app-specific themes before saving them to the usedThemes pref.
-  aList = aList.filter(theme => !LightweightThemeManager._builtInThemes.has(theme.id));
-
-  // Send uninstall events for all themes that need to be removed.
-  while (aList.length > _maxUsedThemes) {
-    let wrapper = new AddonWrapper(aList[aList.length - 1]);
-    AddonManagerPrivate.callAddonListeners("onUninstalling", wrapper, false);
-    aList.pop();
-    AddonManagerPrivate.callAddonListeners("onUninstalled", wrapper);
-  }
-
-  var str = Cc["@mozilla.org/supports-string;1"]
-              .createInstance(Ci.nsISupportsString);
-  str.data = JSON.stringify(aList);
-  _prefs.setComplexValue("usedThemes", Ci.nsISupportsString, str);
-
-  Services.obs.notifyObservers(null, "lightweight-theme-list-changed", null);
-}
-
-function _notifyWindows(aThemeData) {
-  Services.obs.notifyObservers(null, "lightweight-theme-styling-update",
-                               JSON.stringify(aThemeData));
-}
-
-var _previewTimer;
-var _previewTimerCallback = {
-  notify: function() {
-    LightweightThemeManager.resetPreview();
-  }
-};
-
-/**
- * Called when any of the lightweightThemes preferences are changed.
- */
-function _prefObserver(aSubject, aTopic, aData) {
-  switch (aData) {
-    case "maxUsedThemes":
-      try {
-        _maxUsedThemes = _prefs.getIntPref(aData);
-      }
-      catch (e) {
-        _maxUsedThemes = DEFAULT_MAX_USED_THEMES_COUNT;
-      }
-      // Update the theme list to remove any themes over the number we keep
-      _updateUsedThemes(LightweightThemeManager.usedThemes);
-      break;
-  }
-}
-
-function _persistImages(aData, aCallback) {
-  function onSuccess(key) {
-    return function () {
-      let current = LightweightThemeManager.currentTheme;
-      if (current && current.id == aData.id) {
-        _prefs.setBoolPref("persisted." + key, true);
-      }
-      if (--numFilesToPersist == 0 && aCallback) {
-        aCallback();
-      }
-    };
-  }
-
-  let numFilesToPersist = 0;
-  for (let key in PERSIST_FILES) {
-    _prefs.setBoolPref("persisted." + key, false);
-    if (aData[key]) {
-      numFilesToPersist++;
-      _persistImage(aData[key], PERSIST_FILES[key], onSuccess(key));
-    }
-  }
-}
-
-function _getLocalImageURI(localFileName) {
-  var localFile = Services.dirsvc.get("ProfD", Ci.nsIFile);
-  localFile.append(localFileName);
-  return Services.io.newFileURI(localFile);
-}
-
-function _persistImage(sourceURL, localFileName, successCallback) {
-  if (/^(file|resource):/.test(sourceURL))
-    return;
-
-  var targetURI = _getLocalImageURI(localFileName);
-  var sourceURI = _makeURI(sourceURL);
-
-  var persist = Cc["@mozilla.org/embedding/browser/nsWebBrowserPersist;1"]
-                  .createInstance(Ci.nsIWebBrowserPersist);
-
-  persist.persistFlags =
-    Ci.nsIWebBrowserPersist.PERSIST_FLAGS_REPLACE_EXISTING_FILES |
-    Ci.nsIWebBrowserPersist.PERSIST_FLAGS_AUTODETECT_APPLY_CONVERSION |
-    (PERSIST_BYPASS_CACHE ?
-       Ci.nsIWebBrowserPersist.PERSIST_FLAGS_BYPASS_CACHE :
-       Ci.nsIWebBrowserPersist.PERSIST_FLAGS_FROM_CACHE);
-
-  persist.progressListener = new _persistProgressListener(successCallback);
-
-  persist.saveURI(sourceURI, null,
-                  null, Ci.nsIHttpChannel.REFERRER_POLICY_NO_REFERRER_WHEN_DOWNGRADE,
-                  null, null, targetURI, null);
-}
-
-function _persistProgressListener(successCallback) {
-  this.onLocationChange = function() {};
-  this.onProgressChange = function() {};
-  this.onStatusChange   = function() {};
-  this.onSecurityChange = function() {};
-  this.onStateChange    = function(aWebProgress, aRequest, aStateFlags, aStatus) {
-    if (aRequest &&
-        aStateFlags & Ci.nsIWebProgressListener.STATE_IS_NETWORK &&
-        aStateFlags & Ci.nsIWebProgressListener.STATE_STOP) {
-      try {
-        if (aRequest.QueryInterface(Ci.nsIHttpChannel).requestSucceeded) {
-          // success
-          successCallback();
-          return;
-        }
-      } catch (e) { }
-      // failure
-    }
-  };
-}
-
-AddonManagerPrivate.registerProvider(LightweightThemeManager, [
-  new AddonManagerPrivate.AddonType("theme", URI_EXTENSION_STRINGS,
-                                    STRING_TYPE_NAME,
-                                    AddonManager.VIEW_TYPE_LIST, 5000)
-]);