Add support for native extension notifications

chrome/browser/notifications/notification_platform_bridge_mac_unittest.mm

 // Copyright 2016 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.
 
 #import <AppKit/AppKit.h>
 #import <objc/runtime.h>
 
 #include "base/bind.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/run_loop.h"
@@ skipping 36 matching lines @@
     [builder setSubTitle:@"https://www.miguel.com"];
     [builder setOrigin:@"https://www.miguel.com/"];
     [builder setContextMessage:@""];
     [builder setButtons:@"Button1" secondaryButton:@"Button2"];
     [builder setTag:@"tag1"];
     [builder setIcon:[NSImage imageNamed:@"NSApplicationIcon"]];
     [builder setNotificationId:@"notification_id"];
     [builder setProfileId:@"profile_id"];
     [builder setIncognito:false];
     [builder setNotificationType:@(NotificationCommon::PERSISTENT)];
+    [builder setShowSettingsButton:true];
 
     return [builder buildUserNotification];
   }
 
   static void StoreNotificationCount(
       int* out_notification_count,
       std::unique_ptr<std::set<std::string>> notifications,
       bool supports_synchronization) {
     DCHECK(out_notification_count);
     DCHECK(notifications);
@@ skipping 318 matching lines @@
     bridge->Display(NotificationCommon::PERSISTENT, "notification_id2",
                     "profile_id", false, *alert);
     EXPECT_EQ(1u, [[notification_center() deliveredNotifications] count]);
     EXPECT_EQ(1u, [[alert_dispatcher() alerts] count]);
   }
 
   // The destructor of the bridge should close all notifications.
   EXPECT_EQ(0u, [[notification_center() deliveredNotifications] count]);
   EXPECT_EQ(0u, [[alert_dispatcher() alerts] count]);
 }