Introduce concept of provisional destinations to print preview

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;
   overflow: hidden;
   pointer-events: none;
 }
 
-#destination-search .page {
+#destination-search > .page {
   width: 640px;
 }
 
 #destination-search .user-info {
   display: flex;
   position: absolute;
   right: 40px;
   text-align: right;
   top: 14px;
   width: 350px;
@@ skipping 110 matching lines @@
   background-image: -webkit-image-set(
     url(chrome://theme/IDR_CLOSE_DIALOG_H) 1x,
     url(chrome://theme/IDR_CLOSE_DIALOG_H@2x) 2x);
 }
 
 #destination-search .cloudprint-promo .close-button:active {
   background-image: -webkit-image-set(
     url(chrome://theme/IDR_CLOSE_DIALOG_P) 1x,
     url(chrome://theme/IDR_CLOSE_DIALOG_P@2x) 2x);
 }