Remove code for the old Web Notification permission-path.

content/shell/renderer/test_runner/notification_presenter.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/shell/renderer/test_runner/notification_presenter.h"
 
 #include "base/logging.h"
 #include "content/common/desktop_notification_messages.h"
 #include "content/shell/renderer/test_runner/WebTestDelegate.h"
 #include "third_party/WebKit/public/platform/Platform.h"
@@ skipping 112 matching lines @@
   std::string title = notification.title().utf8();
   active_notifications_.erase(title);
 }
 
 WebNotificationPresenter::Permission NotificationPresenter::checkPermission(
     const WebSecurityOrigin& security_origin) {
   return delegate_->checkWebNotificationPermission(
       GURL(security_origin.toString()));
 }
 
-void NotificationPresenter::requestPermission(
-    const WebSecurityOrigin& security_origin,
-    WebNotificationPermissionCallback* callback) {
-  NOTREACHED();
-}
-
 }  // namespace content