Revert r154623 - "Adds clouds.png in shared location."

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 597 matching lines @@
 
 .downloads-warning[hidden] {
   height: 0;
 }
 
 /* Drive space warning banner. */
 .gdrive-space-warning {
   -webkit-box-align: center;
   -webkit-box-orient: horizontal;
   -webkit-transition: height 70ms linear;
-  background-image: url(chrome://resources/images/clouds.png);
+  background-image: url('../images/files/ui/clouds.png');
   background-repeat: repeat-x;
   background-size: 150px 44px;
   border-top: 1px solid rgba(0, 0, 0, 0.1);
   color: #333;
   display: -webkit-box;
   font-size: 13px;
   height: 44px;
   overflow: hidden;
   position: relative;
 }
@@ skipping 906 matching lines @@
   background-color: #ececec;
 }
 
 button:focus {
   outline-color: rgb(77, 144, 254);
 }
 
 #new-folder {
   margin-right: 30px;
 }