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

chrome/test/data/webui/settings/fake_bluetooth.js

Index: chrome/test/data/webui/settings/fake_bluetooth.js
diff --git a/chrome/test/data/webui/settings/fake_bluetooth.js b/chrome/test/data/webui/settings/fake_bluetooth.js
index 81f1fe2296a8d6baa4e87d5e0b6dc0bd009c9787..b547c933cf6421baf4637dbbcfd0fe6fb72a98c7 100644
--- a/chrome/test/data/webui/settings/fake_bluetooth.js
+++ b/chrome/test/data/webui/settings/fake_bluetooth.js
@@ -63,7 +63,9 @@ cr.define('settings', function() {
     },
 
     /** @override */
-    startDiscovery: assertNotReached,
+    startDiscovery: function(callback) {
+      callback();
+    },
 
     /** @override */
     stopDiscovery: assertNotReached,