MD User manager: Migrate from PaperDialogBehavior to cr-dialog.

chrome/browser/resources/md_user_manager/import_supervised_user.html

 <link rel="import" href="/shared_styles.html">
-<link rel="import" href="/user_manager_dialog.html">
+<link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
+<link rel="import" href="chrome://resources/cr_elements/shared_style_css.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout-classes.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-item/paper-item.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-listbox/paper-listbox.html">
 
 <dom-module id="import-supervised-user">
   <template>
-    <style include="shared-styles iron-flex iron-flex-alignment iron-positioning">
+    <style include="shared-styles cr-shared-style iron-flex iron-flex-alignment iron-positioning">
       :host {
         --item-height: 52px;
         --items-container-max-height: calc(var(--item-height) * 4);
       }
 
       #message {
         margin-bottom: 16px;
         margin-top: 20px;
         white-space: pre-wrap;
         word-wrap: break-word;
@@ skipping 30 matching lines @@
         overflow: hidden;
         text-overflow: ellipsis;
         white-space: nowrap;
       }
 
       paper-listbox paper-item .on-device {
         -webkit-margin-start: 10px;
         flex-shrink: 0;
       }
     </style>
-    <user-manager-dialog id="dialog">
+    <dialog is="cr-dialog" id="dialog">
       <div class="title">$i18n{supervisedUserImportTitle}</div>
       <div class="body">
         <div id="message">$i18n{supervisedUserImportText}</div>
         <paper-listbox class="no-padding" selected="{{supervisedUserIndex_}}">
           <template is="dom-repeat" items="[[supervisedUsers_]]">
             <paper-item disabled="[[item.onCurrentDevice]]">
               <img class="profile-img" src="[[item.iconURL]]"></img>
               <div class="profile-name">[[item.name]]</div>
               <div class="on-device" hidden="[[!item.onCurrentDevice]]">
                 $i18n{supervisedUserAlreadyOnThisDevice}
               </div>
             </paper-item>
           </template>
         </paper-listbox>
       </div>
-      <div class="footer horizontal end-justified layout">
-        <paper-button id="cancel" class="action secondary" dialog-dismiss>
+      <div class="button-container">
+        <paper-button id="cancel" class="cancel-button" on-tap="onCancelTap_">
           $i18n{cancel}
         </paper-button>
-        <paper-button id="import" class="action primary"
+        <paper-button id="import" class="action-button"
             on-tap="onImportTap_"
             disabled="[[isImportDisabled_(supervisedUserIndex_)]]">
           $i18n{supervisedUserImportOk}
         </paper-button>
       </div>
-    </user-manager-dialog>
+    </dialog>
   </template>
   <script src="import_supervised_user.js"></script>
 </dom-module>