Files.app: Reland r261616: Add a test to rename a file.

chrome/browser/resources/file_manager/foreground/css/file_manager.css

 /* Copyright (c) 2012 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. */
 
 /* The order of z-index:
  * - 2: drag-selection-border
  * - 3: preview-panel
  * - 500: scrollbar
  * - 500: splitter
  * - 525: spinner
@@ skipping 914 matching lines @@
   font: inherit;
   line-height: 1;
   text-align: inherit;
 }
 
 .table-row-cell .filename-label,
 .table-row-cell input.rename {
   -webkit-box-flex: 1;
 }
 
-[renaming] > .filename-label {
+li[renaming=''] .filename-label {
   display: none;
 }
 
 /* Text box used for renaming in the thumbnail list. */
 .thumbnail-grid input.rename {
   -webkit-margin-start: -1px;
   box-sizing: border-box;
   height: 20px;
   width: 114px;
 }
@@ skipping 1093 matching lines @@
   display: none;
 }
 
 #progress-center-close-view.single button.open {
   display: none;
 }
 
 #progress-center li:not(.cancelable) button.cancel {
   visibility: hidden;
 }