Bug 1891982 - Part 1: Copy Top Sites Feed into the Top Sites component - r=dao,frontend-codestyle-reviewers,Standard8

Differential Revision: https://phabricator.services.mozilla.com/D207827

.eslintrc.js

@@ -670,6 +670,7 @@ module.exports = {
         "browser/components/tabpreview/tabpreview.mjs",
         "browser/components/tests/browser/**",
         "browser/components/textrecognition/**",
+        "browser/components/topsites/**",
         "browser/components/touchbar/**",
         "browser/components/translations/**",
         "browser/components/uitour/**",

browser/base/content/test/static/browser_all_files_referenced.js

@@ -287,6 +287,9 @@ var allowlist = [
 
   // Referenced programmatically
   { file: "chrome://browser/content/backup/BackupManifest.1.schema.json" },
+
+  // Bug 1892002
+  { file: "resource://app/modules/TopSites.sys.mjs" },
 ];
 
 if (AppConstants.NIGHTLY_BUILD) {

browser/components/moz.build

@@ -67,6 +67,7 @@ DIRS += [
     "tabpreview",
     "tabunloader",
     "textrecognition",
+    "topsites",
     "translations",
     "uitour",
     "urlbar",

browser/components/topsites/moz.build

@@ -0,0 +1,12 @@
+# -*- 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/.
+
+EXTRA_JS_MODULES += ["TopSites.sys.mjs"]
+
+XPCSHELL_TESTS_MANIFESTS += ["test/unit/xpcshell.toml"]
+
+with Files("**"):
+    BUG_COMPONENT = ("Firefox", "Top Sites")

browser/components/topsites/test/unit/xpcshell.toml

@@ -0,0 +1,4 @@
+[DEFAULT]
+firefox-appdir = "browser"
+
+["test_top_sites.js"]