Files.app: Fixed the bug that the search box is not hidden when window is shrink.

chrome/browser/resources/file_manager/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. */
 
 html {
   height: 100%;
 }
 
 html.col-resize * {
   cursor: col-resize !important;
@@ skipping 785 matching lines @@
   background-repeat: no-repeat;
   color: #333;
   display: -webkit-box;
   height: 29px;
   line-height: 27px;
   max-width: 150px;
   transition: max-width 200ms;
   width: 100%;
 }
 
-#search-box[hidden] {
-  display: none;  /* Required, since overriden by #search-box. */
-}
-
 body[new-ui] #search-box {
   -webkit-margin-end: 0;
   -webkit-padding-after: 0;
   -webkit-padding-before: 0;
   -webkit-padding-end: 52px;
   -webkit-padding-start: 46px;
   background: -webkit-image-set(
     url('../images/files/ui/new-ui/search_icon_inactive.png') 1x,
     url('../images/files/ui/new-ui/2x/search_icon_inactive.png') 2x);
   background-position: 13px center;
   background-repeat: no-repeat;
   border-style: none;
   display: block;
   height: 48px;
   line-height: 1em;
   max-width: none;
   position: relative;
   transition: width 0;
   width: 58px;
 }
 
+body #search-box[hidden] {
+  display: none;  /* Required, since overriden by #search-box. */
+}
+
 html[dir='rtl'] #search-box {
   background-position: right 4px top 5.5px;
 }
 
 html[dir='rtl'] body[new-ui] #search-box {
   background-position: right 13px center;
 }
 
 #search-box:hover {
   border: 1px solid #b9b9b9;
@@ skipping 1515 matching lines @@
 body[new-ui] #iframe-drag-area {
   -webkit-app-region: drag;
   height: 45px;
   left: 64px;
   position: absolute;
   right: 70px;
   top: 0;
   width: auto;
   z-index: 101;
 }