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

chrome/browser/resources/settings/people_page/people_page.html

Index: chrome/browser/resources/settings/people_page/people_page.html
diff --git a/chrome/browser/resources/settings/people_page/people_page.html b/chrome/browser/resources/settings/people_page/people_page.html
index 99001c36d5419112674f67b94bef9180263cc2da..f2f506809eb1834da7c8d151f79028fac74916a5 100644
--- a/chrome/browser/resources/settings/people_page/people_page.html
+++ b/chrome/browser/resources/settings/people_page/people_page.html
@@ -284,7 +284,7 @@
 </if>
     </settings-animated-pages>
 
-    <cr-dialog id="disconnectDialog">
+    <dialog is="cr-dialog" id="disconnectDialog">
       <div class="title">$i18n{syncDisconnectTitle}</div>
       <div class="body">
         <div inner-h-t-m-l="[[getDisconnectExplanationHtml_(syncStatus.domain)]]">
@@ -308,7 +308,7 @@
           $i18n{syncDisconnectConfirm}
         </paper-button>
       </div>
-    </cr-dialog>
+    </dialog>
 
 <if expr="chromeos">
     <template is="dom-if" if="[[easyUnlockEnabled_]]">