Revert of MD Downloads: track downloads in C++, dispatch discrete JS updates

chrome/browser/resources/md_downloads/action_service_unittest.js

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * @param {!Array<string>} list
- * @return {string}
- */
-function str(list) {
-  return JSON.stringify(list);
-}
-
-/**
- * @extends {testing.Test}
- * @constructor
- */
-function ActionServiceUnitTest() {}
-
-ActionServiceUnitTest.prototype = {
-  __proto__: testing.Test.prototype,
-
-  /** @override */
-  extraLibraries: [
-    '../../../../ui/webui/resources/js/cr.js',
-    'action_service.js',
-  ],
-};
-
-TEST_F('ActionServiceUnitTest', 'splitTerms', function() {
-  var ActionService = downloads.ActionService;
-  assertEquals(str([]), str(ActionService.splitTerms('')));
-  assertEquals(str([]), str(ActionService.splitTerms('  ')));
-  assertEquals(str(['a']), str(ActionService.splitTerms('a')));
-  assertEquals(str(['a b']), str(ActionService.splitTerms('a b')));
-  assertEquals(str(['a', 'b']), str(ActionService.splitTerms('a "b"')));
-  assertEquals(str(['a', 'b', 'c']), str(ActionService.splitTerms('a "b" c')));
-});