In case of search add "Searching..." string to the spinner in the center.

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.col-resize * {
   cursor: col-resize !important;
 }
 
 /* Outer frame of the dialog. */
 body {
@@ skipping 491 matching lines @@
   -webkit-box-orient: vertical;
   display: -webkit-box;
 }
 
 #list-container {
   -webkit-box-flex: 1;
   display: -webkit-box;
   position: relative;
 }
 
 .spinner {

[Vladislav Kaznacheev, 2012/07/30 11:19:46]

It might be not obvious but this CSS class is used in 3 more places in the Files
app which this change is likely to break. 

[Oleg Eterevsky, 2012/07/30 12:21:10]

I've restored old styled and made spinner in FileManager independent from it.

   background-image: url('../images/common/spinner.svg');
-  background-size: 100%;
+  background-repeat: no-repeat;
+  opacity: 0.6;
+}
+
+#spinner-without-text {
   height: 22px;
-  left: 50%;
-  margin-left: -11px;
-  margin-top: -11px;
-  opacity: 0.5;
+  width: 22px;
+}
+
+#spinner-container {
+  -webkit-box-align: center;
+  -webkit-box-pack: center;
+  bottom: 0;
+  display: -webkit-box;
+  left: 0;
   position: absolute;
-  top: 50%;
-  width: 22px;
+  right: 0;
+  top: 0;
+}
+
+#spinner-with-text {
+  font-size: 16px;
+  padding-left: 26px;
 }
 
 .downloads-warning {
   -webkit-box-align: center;
   -webkit-box-orient: horizontal;
   -webkit-transition: height 70ms linear;
   background-color: #f0f0f0;
   background-image: -webkit-image-set(
     url('../images/files/ui/warning_icon_square.png') 1x,
     url('../images/files/ui/2x/warning_icon_square.png') 2x);
@@ skipping 874 matching lines @@
   width: 50%;
 }
 
 #list-container .table-header-inner {
   height: 100%;
 }
 
 #list-container .table-header-cell:hover {
   background-color: #f2f2f2;
 }