Merge: MD Downloads: fix search spinner when terms are the same

chrome/browser/resources/md_downloads/action_service_unittest.gtestjs

 // 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);
@@ skipping 19 matching lines @@
   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')));
   assertEquals(str(['a', 'b b', 'c']),
                str(ActionService.splitTerms('a "b b" c')));
 });
+
+TEST_F('ActionServiceUnitTest', 'searchWithSimilarTerms', function() {
+  /**
+   * @extends {downloads.ActionService}
+   * @constructor
+   */
+  function TestActionService() {
+    downloads.ActionService.call(this);
+  }
+
+  TestActionService.prototype = {
+    __proto__: downloads.ActionService.prototype,
+    loadMore: function() { /* No chrome.send() for you! */ },
+  };
+
+  var actionService = new TestActionService();
+
+  assertTrue(actionService.search('a'));
+  assertFalse(actionService.search('a '));  // Same term + space should no-op.
+});