Migrate <cr-dialog> from PaperDialogBehavior to native <dialog>.

chrome/browser/resources/settings/privacy_page/privacy_page.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="/clear_browsing_data_dialog/clear_browsing_data_dialog.html">
 <link rel="import" href="/controls/settings_checkbox.html">
 <link rel="import" href="/route.html">
 <link rel="import" href="/settings_main/settings_main_rendered.html">
 <link rel="import" href="/settings_page/settings_animated_pages.html">
 <link rel="import" href="/settings_page/settings_subpage.html">
@@ skipping 10 matching lines @@
 </if>
 <if expr="is_win or is_macosx">
 <link rel="import" href="/privacy_page/privacy_page_browser_proxy.html">
 </if>
 
 <dom-module id="settings-privacy-page">
   <template>
     <style include="settings-shared"></style>
     <template is="dom-if" if="[[showClearBrowsingDataDialog_]]" restamp>
       <settings-clear-browsing-data-dialog prefs="{{prefs}}"
-          on-iron-overlay-closed="onIronOverlayClosed_">
+          on-close="onDialogClosed_">
       </settings-clear-browsing-data-dialog>
     </template>
     <settings-animated-pages id="pages" current-route="{{currentRoute}}"
         section="privacy">
       <neon-animatable id="main">
         <div class="settings-box block first">
           <p class="privacy-explanation">
             $i18nRaw{improveBrowsingExperience}
           </p>
           <settings-checkbox
@@ skipping 226 matching lines @@
       <template is="dom-if" name="site-details">
         <settings-subpage
             page-title="$i18n{siteSettingsSiteDetailsPageTitle}">
           <site-details site="[[selectedSite]]"></site-details>
         </settings-subpage>
       </template>
     </settings-animated-pages>
   </template>
   <script src="privacy_page.js"></script>
 </dom-module>