PlatformNotificationService layering cleanup.

chrome/browser/notifications/notification_ui_manager_mac.mm

 // Copyright 2015 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 "chrome/browser/notifications/notification_ui_manager_mac.h"
 
 #include <utility>
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
@@ skipping 161 matching lines @@
 
   toast.get().userInfo = @{
     kNotificationOriginKey :
         base::SysUTF8ToNSString(notification.origin_url().spec()),
     kNotificationPersistentIdKey : base::SysUTF8ToNSString(notification_id),
     kNotificationProfilePersistentIdKey : base::SysUTF8ToNSString(profile_id),
     kNotificationIncognitoKey : [NSNumber numberWithBool:incognito]
   };
 
   [notification_center_ deliverNotification:toast];
-  notification.delegate()->Display();
 }
 
 void NotificationUIManagerMac::Close(const std::string& profile_id,
                                      const std::string& notification_id) {
   NSString* candidate_id = base::SysUTF8ToNSString(notification_id);
 
   NSString* current_profile_id = base::SysUTF8ToNSString(profile_id);
   for (NSUserNotification* toast in
        [notification_center_ deliveredNotifications]) {
     NSString* toast_id =
@@ skipping 94 matching lines @@
           persistentNotificationId.longLongValue, buttonIndex);
 }
 
 - (BOOL)userNotificationCenter:(NSUserNotificationCenter*)center
      shouldPresentNotification:(NSUserNotification*)nsNotification {
   // Always display notifications, regardless of whether the app is foreground.
   return YES;
 }
 
 @end