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

chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js

Index: chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js
diff --git a/chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js b/chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js
index ba1b7d92e51d70753882e2bd1ae3e65a7c316876..a91d742ee8ccce8ce0df13af9cfa31fea66e174c 100644
--- a/chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js
+++ b/chrome/browser/resources/settings/bluetooth_page/bluetooth_page.js
@@ -531,7 +531,7 @@ Polymer({
     Polymer.dom.flush();
     var dialog = this.$$('#deviceDialog');
     dialog.open();
-    dialog.focus();
+    this.startDiscovery_();
   },
 
   /** @private */
@@ -541,7 +541,4 @@ Polymer({
     this.pairingDevice = null;
     this.pairingEvent = null;
   },
-
-  /** @private */
-  onDialogOpened_: function() { this.startDiscovery_(); },
 });