Reject the permissionState promise with NotSupported Exception (2/3)

content/shell/browser/layout_test/layout_test_push_messaging_service.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/browser/layout_test/layout_test_push_messaging_service.h"
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "content/public/browser/permission_type.h"
 #include "content/shell/browser/layout_test/layout_test_browser_context.h"
@@ skipping 64 matching lines @@
     const GURL& embedding_origin,
     bool user_visible) {
   return ToWebPushPermissionStatus(LayoutTestContentBrowserClient::Get()
       ->GetLayoutTestBrowserContext()
       ->GetLayoutTestPermissionManager()
       ->GetPermissionStatus(PermissionType::PUSH_MESSAGING,
                             requesting_origin,
                             embedding_origin));
 }
 
+bool LayoutTestPushMessagingService::SupportNonVisibleMessages() {
+  return false;
+}
+
 void LayoutTestPushMessagingService::Unregister(
     const GURL& requesting_origin,
     int64 service_worker_registration_id,
     const std::string& sender_id,
     const UnregisterCallback& callback) {
   callback.Run(PUSH_UNREGISTRATION_STATUS_SUCCESS_UNREGISTERED);
 }
 
 }  // namespace content