Restyled the auto-completion box for Files.app's new UI.

chrome/browser/resources/file_manager/css/common.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. */
 
 /* This file contains "borrowed" copy of standard styles. To simplify merging,
  * when altering, please preserve original property value by adding comments. */
 input.common[type='checkbox'],
 input.common[type='radio'] {
   -webkit-appearance: none;
   -webkit-border-radius: 1px;
@@ skipping 269 matching lines @@
   border-radius: 3px;
   outline: none;
   padding: 2px 0;
   z-index: 15;
 }
 
 body[new-ui] menu.chrome-menu {
   -webkit-box-shadow: 0 1px 4px 0 rgba(0, 0, 0, .5);
   background-color: rgb(250, 250, 250);
   border: 1px solid rgb(255, 255, 255);
+  color: rgb(34, 34, 34);
   overflow: hidden;
   padding: 5px 0;
 }
 
 menu.chrome-menu[hidden] {
   display: block;
   opacity: 0;
   pointer-events: none;
   visibility: hidden;
 }
@@ skipping 181 matching lines @@
   background-image: -webkit-image-set(
     url('../images/icon32.png') 1x,
     url('../images/icon64.png') 2x);
 }
 
 div.watch-single-video-icon {
   background-image: -webkit-image-set(
     url('../images/media/watch.png') 1x,
     url('../images/media/2x/watch.png') 2x);
 }