DO NOT SUBMIT. Implement an XPCService for notifications.

chrome/browser/ui/cocoa/notifications/notification_builder_mac.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 "chrome/browser/ui/cocoa/notifications/notification_builder_mac.h"
 
 #import <AppKit/AppKit.h>
 
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 105 matching lines @@
 
 - (void)setNotificationType:(NSNumber*)notificationType {
   [notificationData_ setObject:notificationType
                         forKey:notification_constants::kNotificationType];
 }
 
 - (NSUserNotification*)buildUserNotification {
   base::scoped_nsobject<NSUserNotification> toast(
       [[NSUserNotification alloc] init]);
   [toast setTitle:[notificationData_ objectForKey:kNotificationTitle]];
-  [toast setSubtitle:[notificationData_ objectForKey:kNotificationSubTitle]];
   [toast setInformativeText:[notificationData_
-                                objectForKey:kNotificationInformativeText]];
+                                objectForKey:kNotificationSubTitle]];
+  [toast setSubtitle:[notificationData_
+                         objectForKey:kNotificationInformativeText]];
 
   // Icon
   if ([notificationData_ objectForKey:kNotificationImage]) {
     if ([toast respondsToSelector:@selector(_identityImage)]) {
       NSImage* image = [notificationData_ objectForKey:kNotificationImage];
       [toast setValue:image forKey:@"_identityImage"];
       [toast setValue:@NO forKey:@"_identityImageHasBorder"];
     }
   }
 
@@ skipping 83 matching lines @@
   };
 
   return toast.autorelease();
 }
 
 - (NSDictionary*)buildDictionary {
   return [[notificationData_ copy] autorelease];
 }
 
 @end