Replace IDR_WEB_UI_CLOSE* with IDR_CLOSE_DIALOG*, cleanup, etc.

chrome/browser/resources/print_preview/search/destination_search.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. */
 
 #destination-search {
   z-index: 3;
 }
 
 #destination-search.transparent {
   opacity: 0;
@@ skipping 59 matching lines @@
   height: 24px;
   width: 24px;
 }
 
 #destination-search .cloudprint-promo .promo-text {
   -webkit-box-flex: 1;
 }
 
 #destination-search .cloudprint-promo .close-button {
   -webkit-margin-start: 12px;
-  background-image: url('chrome://theme/IDR_WEB_UI_CLOSE');
+  background-image: url('chrome://theme/IDR_CLOSE_DIALOG');
   background-repeat: no-repeat;
   background-size: 14px;
   height: 14px;
   width: 14px;
 }
 
 #destination-search .cloudprint-promo .close-button:hover {
-  background-image: url('chrome://theme/IDR_WEB_UI_CLOSE_HOVER');
+  background-image: url('chrome://theme/IDR_CLOSE_DIALOG_H');
 }
 
 #destination-search .cloudprint-promo .close-button:active {
-  background-image: url('chrome://theme/IDR_WEB_UI_CLOSE_PRESSED');
+  background-image: url('chrome://theme/IDR_CLOSE_DIALOG_P');
 }