Remove code for the old Web Notification permission-path.

content/shell/renderer/test_runner/notification_presenter.cc

Index: content/shell/renderer/test_runner/notification_presenter.cc
diff --git a/content/shell/renderer/test_runner/notification_presenter.cc b/content/shell/renderer/test_runner/notification_presenter.cc
index 4c4960574335d2b881f9b5ffd303f0064a05a0d9..48ddb6890f63d19f5d5027d2bc3b70e077f51afb 100644
--- a/content/shell/renderer/test_runner/notification_presenter.cc
+++ b/content/shell/renderer/test_runner/notification_presenter.cc
@@ -130,10 +130,4 @@ WebNotificationPresenter::Permission NotificationPresenter::checkPermission(
       GURL(security_origin.toString()));
 }
 
-void NotificationPresenter::requestPermission(
-    const WebSecurityOrigin& security_origin,
-    WebNotificationPermissionCallback* callback) {
-  NOTREACHED();
-}
-
 }  // namespace content