MD Bookmarks: Restore any previously selected folder when clearing search

chrome/test/data/webui/md_bookmarks/sidebar_test.js

 // Copyright 2016 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.
 
 suite('<bookmarks-sidebar>', function() {
   var sidebar;
   var store;
 
   setup(function() {
     store = new bookmarks.TestStore({
@@ skipping 52 matching lines @@
       assertEquals('0', f.style.getPropertyValue('--node-depth'));
     });
     Array.prototype.forEach.call(firstGen, function(f) {
       assertEquals(1, f.depth);
       assertEquals('1', f.style.getPropertyValue('--node-depth'));
     });
     Array.prototype.forEach.call(secondGen, function(f) {
       assertEquals(2, f.depth);
       assertEquals('2', f.style.getPropertyValue('--node-depth'));
     });
-  })
+  });
+
+  test('doesn\'t highlight selected folder while searching', function() {
+    var rootFolders =
+        sidebar.$['folder-tree'].querySelectorAll('bookmarks-folder-node');
+
+    store.data.selectedFolder = '1';
+    store.notifyObservers();
+
+    assertEquals('1', rootFolders['0'].itemId);
+    assertTrue(rootFolders['0'].isSelectedFolder_);
+
+    store.data.search = {
+      term: 'test',
+      inProgress: false,
+      results: ['3'],
+    };
+    store.notifyObservers();
+
+    assertFalse(rootFolders['0'].isSelectedFolder_);
+  });
 });