Bug 1896292 - Use toolkits OfflineAppCacheHelper in sanitizer. r=IanN

It was moved into toolkit from browser in Bug 1415342 so we can delete our copy.

suite/components/sanitize/Sanitizer.jsm

@@ -15,6 +15,7 @@ XPCOMUtils.defineLazyModuleGetters(this, {
   FormHistory: "resource://gre/modules/FormHistory.jsm",
   PlacesUtils: "resource://gre/modules/PlacesUtils.jsm",
   setTimeout: "resource://gre/modules/Timer.jsm",
+  OfflineAppCacheHelper: "resource://gre/modules/offlineAppCache.jsm",
 });
 
 XPCOMUtils.defineLazyServiceGetter(this, "serviceWorkerManager",
@@ -371,8 +372,6 @@ var Sanitizer = {
 
     offlineApps: {
       async clear(range) {
-        // AppCache
-        ChromeUtils.import("resource:///modules/OfflineAppCacheHelper.jsm");
         // This doesn't wait for the cleanup to be complete.
         OfflineAppCacheHelper.clear();
 

suite/modules/OfflineAppCacheHelper.jsm

@@ -1,14 +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/. */
-
-var EXPORTED_SYMBOLS = ["OfflineAppCacheHelper"];
-
-var OfflineAppCacheHelper = {
-  clear() {
-    var appCacheStorage = Services.cache2.appCacheStorage(Services.loadContextInfo.default, null);
-    try {
-      appCacheStorage.asyncEvictStorage(null);
-    } catch (er) {}
-  }
-};

suite/modules/moz.build

@@ -7,7 +7,6 @@ XPCSHELL_TESTS_MANIFESTS += ["test/unit/xpcshell.ini"]
 
 EXTRA_JS_MODULES += [
     "Feeds.jsm",
-    "OfflineAppCacheHelper.jsm",
     "OpenInTabsUtils.jsm",
     "PermissionUI.jsm",
     "RecentWindow.jsm",